Big-Data-HPC-Platform/common/workunit/workunit.cpp

/*##############################################################################

    Copyright (C) 2011 HPCC Systems.

    All rights reserved. This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
############################################################################## */

#include "jlib.hpp"
#include "workunit.hpp"
#include "jprop.hpp"
#include "jmisc.hpp"
#include "jexcept.hpp"
#include "jiter.ipp"
#include "jptree.hpp"
#include "jtime.ipp"
#include "jencrypt.hpp"
#include "eclrtl.hpp"
#include "deftype.hpp"
#include <time.h>

#include "mpbase.hpp"
#include "daclient.hpp"
#include "dadfs.hpp"
#include "dafdesc.hpp"
#include "dasds.hpp"
#include "danqs.hpp"
#include "dautils.hpp"
#include "dllserver.hpp"
#include "thorhelper.hpp"
#include "workflow.hpp"
#include "nbcd.hpp"
#include "seclib.hpp"

#include "wuerror.hpp"
#include "wujobq.hpp"

#define GLOBAL_WORKUNIT "global"

#define SDS_LOCK_TIMEOUT (5*60*1000) // 5mins, 30s a bit short

static int workUnitTraceLevel = 1;


static StringBuffer &getXPath(StringBuffer &wuRoot, const char *wuid)
{
    // MORE - can fold in the date
    return wuRoot.append("/WorkUnits/").append(wuid);
}

//To be called by eclserver, but esp etc. won't know, so we need to store it.
static StringBuffer & appendLibrarySuffix(StringBuffer & suffix)
{
#ifdef _WIN32
    suffix.append("W");
#else
    suffix.append("L");
#endif
#ifdef __64BIT__
    suffix.append("64");
#else
    suffix.append("32");
 #endif
    return suffix;
}



typedef MapStringTo<bool> UniqueScopes;

static void wuAccessError(const char *username, const char *action, const char *wuscope, const char *wuid, bool excpt, bool log)
{
    StringBuffer err;
    err.append("Workunit Access Denied - action: ").append(action).append(" user:").append(username ? username : "<Unknown>");
    if (wuid)
        err.append(" workunit:").append(wuid);
    if (wuscope)
        err.append(" scope:").append(wuscope);
    //MORE - we would need more information passed in from outside if we want to make the audit message format the same as from higher level ESP calls
    SYSLOG(AUDIT_TYPE_ACCESS_FAILURE, err.str());
    if (log)
        LOG(MCuserError, "%s", err.str());
    if (excpt)
        throw MakeStringException(WUERR_AccessError, "%s", err.str());
}
static bool checkWuScopeSecAccess(const char *wuscope, ISecManager &secmgr, ISecUser *secuser, int required, const char *action, bool excpt, bool log)
{
    bool ret=(!secuser) ? true : (secmgr.authorizeEx(RT_WORKUNIT_SCOPE, *secuser, wuscope)>=required);
    if (!ret && (log || excpt))
        wuAccessError(secuser ? secuser->getName() : NULL, action, wuscope, NULL, excpt, log);
    return ret;
}
static bool checkWuScopeListSecAccess(const char *wuscope, ISecResourceList *scopes, int required, const char *action, bool excpt, bool log)
{
    if (!scopes)
        return true;
    bool ret=true;
    if (wuscope)
    {
        Owned<ISecResource> res=scopes->getResource(wuscope);
        if (!res || res->getAccessFlags()<required)
            ret=false;
    }
    else
    {
        for (int seq=0; ret && seq<scopes->count(); seq++)
        {
            ISecResource *res=scopes->queryResource(seq);
            if (res && res->getAccessFlags()<required)
                return false;
        }
    }
    if (!ret && (log || excpt))
        wuAccessError(NULL, action, wuscope, NULL, excpt, log);
    return ret;
}
static bool checkWuSecAccess(IConstWorkUnit &cw, ISecManager &secmgr, ISecUser *secuser, int required, const char *action, bool excpt, bool log)
{
    SCMStringBuffer wuscope;
    bool ret=(!secuser) ? true : (secmgr.authorizeEx(RT_WORKUNIT_SCOPE, *secuser, cw.getWuScope(wuscope).str())>=required);
    if (!ret && (log || excpt))
    {
        SCMStringBuffer wuid;
        wuAccessError(secuser ? secuser->getName() : NULL, action, wuscope.str(), cw.getWuid(wuid).str(), excpt, log);
    }
    return ret;
}
static bool checkWuSecAccess(const char *wuid, ISecManager &secmgr, ISecUser *secuser, int required, const char *action, bool excpt, bool log)
{
    StringBuffer wuRoot;
    Owned<IRemoteConnection> conn = querySDS().connect(getXPath(wuRoot, wuid).str(), myProcessSession(), 0, SDS_LOCK_TIMEOUT);
    if (conn)
    {
        Owned<IPropertyTree> ptree=conn->getRoot();
        return checkWuScopeSecAccess(ptree->queryProp("@scope"), secmgr, secuser, required, action, excpt, log);
    }
    return false;
}

#define PROGRESS_FORMAT_V 2



class CConstGraphProgress : public CInterface, implements IConstWUGraphProgress
{
    class CGraphProgress : public CInterface, implements IWUGraphProgress
    {
        CConstGraphProgress &parent;
    public:
        IMPLEMENT_IINTERFACE;
        CGraphProgress(CConstGraphProgress &_parent) : parent(_parent)
        {
            parent.lockWrite();
        }
        ~CGraphProgress()
        {
            parent.unlock();
        }
        virtual IPropertyTree * queryProgressTree() { return parent.queryProgressTree(); }
        virtual WUGraphState queryGraphState() { return parent.queryGraphState(); }
        virtual WUGraphState queryNodeState(WUGraphIDType nodeId) { return parent.queryNodeState(nodeId); }
        virtual IWUGraphProgress * update() { return parent.update(); }
        virtual unsigned queryFormatVersion() { return parent.queryFormatVersion(); }
        virtual IPropertyTree & updateEdge(WUGraphIDType nodeId, const char *edgeId)
        {
            return parent.updateEdge(nodeId, edgeId);
        }
        virtual IPropertyTree & updateNode(WUGraphIDType nodeId, WUNodeIDType id)
        {
            return parent.updateNode(nodeId, id);
        }
        virtual void setGraphState(WUGraphState state)
        {
            parent.setGraphState(state);
        }
        virtual void setNodeState(WUGraphIDType nodeId, WUGraphState state)
        {
            parent.setNodeState(nodeId, state);
        }
    };
    IPropertyTree &updateElement(WUGraphIDType nodeId, const char *elemName, const char *id)
    {
        IPropertyTree *elem = NULL;
        if (!connectedWrite) lockWrite();
        StringBuffer path;
        path.append("node[@id=\"").append(nodeId).append("\"]");
        IPropertyTree *node = progress->queryPropTree(path.str());
        if (!node)
        {
            node = progress->addPropTree("node", createPTree());
            node->setPropInt("@id", (int)nodeId);
            elem = node->addPropTree(elemName, createPTree());
            elem->setProp("@id", id);
        }
        else
        {
            path.clear().append(elemName).append("[@id=\"").append(id).append("\"]");
            elem = node->queryPropTree(path.str());
            if (!elem)
            {
                elem = node->addPropTree(elemName, createPTree());
                elem->setProp("@id", id);
            }
        }
        return *elem;
    }
public:
    IMPLEMENT_IINTERFACE;
    static void deleteWuidProgress(const char *wuid)
    {
        StringBuffer path("/GraphProgress/");
        path.append(wuid);
        Owned<IRemoteConnection> conn = querySDS().connect(path.str(), myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
        if (conn)
            conn->close(true);
    }
    CConstGraphProgress(const char *_wuid, const char *_graphName) : wuid(_wuid), graphName(_graphName)
    {
        rootPath.append("/GraphProgress/").append(wuid).append('/').append(graphName).append('/');
        connected = connectedWrite = false;
        formatVersion = 0;
        progress = NULL;
    }
    void connect()
    {
        conn.clear();
        packProgress(wuid,false);
        conn.setown(querySDS().connect(rootPath.str(), myProcessSession(), RTM_LOCK_READ|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT));

        progress = conn->queryRoot();
        formatVersion = progress->getPropInt("@format");
        connected = true;
    }
    void lockWrite()
    {
        if (connectedWrite) return;
        // JCSMORE - look at using changeMode here.
        if (conn)
            conn.clear();
        else
            packProgress(wuid,false);
        conn.setown(querySDS().connect(rootPath.str(), myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT));
        progress = conn->queryRoot();
        if (!progress->hasChildren()) // i.e. blank.
        {
            formatVersion = PROGRESS_FORMAT_V;
            progress->setPropInt("@format", PROGRESS_FORMAT_V);
        }
        else
            formatVersion = progress->getPropInt("@format");
        connected = connectedWrite = true;
    }
    void unlock()
    {
        connected = false;
        connectedWrite = false;
        conn.clear();
    }
    IPropertyTree &updateNode(WUGraphIDType nodeId, WUNodeIDType id)
    {
        StringBuffer s;
        return updateElement(nodeId, "node", s.append(id).str());
    }
    IPropertyTree &updateEdge(WUGraphIDType nodeId, const char *edgeId)
    {
        return updateElement(nodeId, "edge", edgeId);
    }
    static bool getRunningGraph(const char *wuid, IStringVal &graphName, WUGraphIDType &subId)
    {
        StringBuffer path;
        Owned<IRemoteConnection> conn = querySDS().connect(path.append("/GraphProgress/").append(wuid).str(), myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
        if (!conn) return false;

        const char *name = conn->queryRoot()->queryProp("Running/@graph");
        if (name)
        {
            graphName.set(name);
            subId = conn->queryRoot()->getPropInt64("Running/@subId");
            return true;
        }
        else
            return false;
    }
    void setGraphState(WUGraphState state)
    {
        progress->setPropInt("@_state", (unsigned)state);
    }
    void setNodeState(WUGraphIDType nodeId, WUGraphState state)
    {
        if (!connectedWrite) lockWrite();
        StringBuffer path;
        path.append("node[@id=\"").append(nodeId).append("\"]");
        IPropertyTree *node = progress->queryPropTree(path.str());
        if (!node)
        {
            node = progress->addPropTree("node", createPTree());
            node->setPropInt("@id", (int)nodeId);
        }
        node->setPropInt("@_state", (unsigned)state);
        
        switch (state)
        {
            case WUGraphRunning:
            {
                StringBuffer path;
                Owned<IRemoteConnection> conn = querySDS().connect(path.append("/GraphProgress/").append(wuid).str(), myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);
                IPropertyTree *running = conn->queryRoot()->setPropTree("Running", createPTree());
                running->setProp("@graph", graphName);
                running->setPropInt64("@subId", nodeId);
                break;
            }
            case WUGraphComplete:
            {
                StringBuffer path;
                Owned<IRemoteConnection> conn = querySDS().connect(path.append("/GraphProgress/").append(wuid).str(), myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
                conn->queryRoot()->removeProp("Running"); // only one thing running at any given time and one thing with lockWrite access
                break;
            }
        }
    }
    virtual IPropertyTree * queryProgressTree()
    {
        if (!connected) connect();
        return progress;
    }
    virtual WUGraphState queryGraphState()
    {
        return (WUGraphState)queryProgressTree()->getPropInt("@_state", (unsigned)WUGraphUnknown);
    }
    virtual WUGraphState queryNodeState(WUGraphIDType nodeId)
    {
        StringBuffer path;
        path.append("node[@id=\"").append(nodeId).append("\"]/@_state");
        return (WUGraphState)queryProgressTree()->getPropInt(path.str(), (unsigned)WUGraphUnknown);
    }
    virtual IWUGraphProgress * update()
    {
        return new CGraphProgress(*this);
    }
    virtual unsigned queryFormatVersion()
    {
        if (!connected) connect();
        return formatVersion;
    }

    static bool packProgress(const char *wuid,bool pack)
    {
        StringBuffer path;
        path.append("/GraphProgress/").append(wuid);
        Owned<IRemoteConnection> conn(querySDS().connect(path.str(), myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT));
        if (!conn) 
            return false;
        Owned<IPropertyTree> newt;
        MemoryBuffer buf;
        IPropertyTree *root = conn->queryRoot();
        if (root->getPropBin("Packed",buf)) {
            if (pack)
                return true;
            newt.setown(createPTree(buf));
            IPropertyTree *running = root->queryPropTree("Running");
            if (running)
                newt->setPropTree("Running",createPTreeFromIPT(running));
        }
        else {
            if (!pack)
                return true;
            newt.setown(createPTree(wuid));
            IPropertyTree *running = root->queryPropTree("Running");
            if (running) {
                newt->setPropTree("Running",createPTreeFromIPT(running));
                root->removeTree(running);
            }
            root->serialize(buf);
            newt->setPropBin("Packed",buf.length(),buf.bufferBase());
        }
        root->setPropTree(NULL,newt.getClear());
        return true;
    }


private:
    Owned<IRemoteConnection> conn;
    IPropertyTree* progress;
    StringAttr wuid, graphName;
    StringBuffer rootPath;
    bool connected, connectedWrite;
    unsigned formatVersion;
};

class CLocalWUTimeStamp : public CInterface, implements IConstWUTimeStamp
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUTimeStamp(IPropertyTree *p);

    virtual IStringVal & getApplication(IStringVal & str) const;
    virtual IStringVal & getEvent(IStringVal & str) const;
    virtual IStringVal & getDate(IStringVal & dt) const;
};

class CLocalWUAppValue : public CInterface, implements IConstWUAppValue
{
    Owned<IPropertyTree> p;
    StringBuffer prop;
public:
    IMPLEMENT_IINTERFACE;
    CLocalWUAppValue(IPropertyTree *p,unsigned child);

    virtual IStringVal & getApplication(IStringVal & str) const;
    virtual IStringVal & getName(IStringVal & str) const;
    virtual IStringVal & getValue(IStringVal & dt) const;
};


template <typename T, typename IT> struct CachedTags
{
    CachedTags(): cached(false) {}
    void load(IPropertyTree* p,const char* xpath)
    {
        if (!cached)
        {
            assertex(tags.length() == 0);
            Owned<IPropertyTreeIterator> r = p->getElements(xpath);
            for (r->first(); r->isValid(); r->next())
            {
                IPropertyTree *rp = &r->query();
                rp->Link();
                tags.append(*new T(rp));
            }
            cached = true;
        }
    }

    operator IArrayOf<IT>&() { return tags; }

    void kill()
    {
        cached = false;
        tags.kill();
    }

    bool cached;
    IArrayOf<IT> tags;
};

template <>  struct CachedTags<CLocalWUAppValue, IConstWUAppValue>
{
    CachedTags(): cached(false) {}
    void load(IPropertyTree* p,const char* xpath)
    {
        if (!cached)
        {
            assertex(tags.length() == 0);
            Owned<IPropertyTreeIterator> r = p->getElements(xpath);
            for (r->first(); r->isValid(); r->next())
            {
                IPropertyTree *rp = &r->query();
                Owned<IPropertyTreeIterator> v = rp->getElements("*");
                unsigned pos = 1;
                for (v->first(); v->isValid(); v->next())
                {
                    rp->Link();
                    tags.append(*new CLocalWUAppValue(rp,pos++));
                }
            }
            cached = true;
        }
    }

    operator IArrayOf<IConstWUAppValue>&() { return tags; }

    void kill()
    {
        cached = false;
        tags.kill();
    }

    bool cached;
    IArrayOf<IConstWUAppValue> tags;
};


class CLocalWorkUnit : public CInterface, implements IConstWorkUnit , implements ISDSSubscription, implements IExtendedWUInterface
{
    friend StringBuffer &exportWorkUnitToXML(const IConstWorkUnit *wu, StringBuffer &str);
    friend void exportWorkUnitToXMLFile(const IConstWorkUnit *wu, const char * filename, unsigned extraXmlFlags);

    // NOTE - order is important - we need to construct connection before p and (especially) destruct after p
    Owned<IRemoteConnection> connection;
    Owned<IPropertyTree> p;
    bool dirty;
    bool connectAtRoot;
    mutable bool abortDirty;
    mutable bool abortState;
    mutable CriticalSection crit;
    mutable Owned<IWUQuery> query;
    mutable Owned<IWUWebServicesInfo> webServicesInfo;
    mutable Owned<IWURoxieQueryInfo> roxieQueryInfo;
    mutable Owned<IWorkflowItemIterator> workflowIterator;
    mutable bool workflowIteratorCached;
    mutable bool resultsCached;
    mutable bool temporariesCached;
    mutable bool variablesCached;
    mutable bool exceptionsCached;
    mutable bool pluginsCached;
    mutable bool librariesCached;
    mutable bool activitiesCached;
    mutable bool webServicesInfoCached;
    mutable bool roxieQueryInfoCached;
    mutable IArrayOf<IWUActivity> activities;
    mutable IArrayOf<IWUPlugin> plugins;
    mutable IArrayOf<IWULibrary> libraries;
    mutable IArrayOf<IWUException> exceptions;
    mutable IArrayOf<IWUGraph> graphs;
    mutable IArrayOf<IWUResult> results;
    mutable IArrayOf<IWUResult> temporaries;
    mutable IArrayOf<IWUResult> variables;
    mutable CachedTags<CLocalWUTimeStamp,IConstWUTimeStamp> timestamps;
    mutable CachedTags<CLocalWUAppValue,IConstWUAppValue> appvalues;
    mutable Owned<IUserDescriptor> userDesc;
    Mutex locked;
    Owned<ISecManager> secMgr;
    Owned<ISecUser> secUser;
    mutable Owned<IPropertyTree> cachedGraphs;


public:
    IMPLEMENT_IINTERFACE;

    CLocalWorkUnit(IRemoteConnection *_conn, ISecManager *secmgr, ISecUser *secuser, const char *parentWuid = NULL);
    CLocalWorkUnit(IRemoteConnection *_conn, IPropertyTree* root, ISecManager *secmgr, ISecUser *secuser);
    ~CLocalWorkUnit();
    CLocalWorkUnit(const char *dummyWuid, const char *parentWuid, ISecManager *secmgr, ISecUser *secuser);

    ISecManager *querySecMgr(){return secMgr.get();}
    ISecUser *querySecUser(){return secUser.get();}

    void setSecIfcs(ISecManager *mgr, ISecUser*usr){secMgr.set(mgr); secUser.set(usr);}
    
    virtual bool aborting() const;
    virtual void forceReload();
    virtual WUAction getAction() const;
    virtual IStringVal& getActionEx(IStringVal & str) const;
    virtual IStringVal & getApplicationValue(const char * application, const char * propname, IStringVal & str) const;
    virtual int getApplicationValueInt(const char * application, const char * propname, int defVal) const;
    virtual IConstWUAppValueIterator & getApplicationValues() const;
    virtual bool hasWorkflow() const;
    virtual unsigned queryEventScheduledCount() const;
    virtual IPropertyTree * queryWorkflowTree() const;
    virtual IConstWorkflowItemIterator * getWorkflowItems() const;
    virtual IWorkflowItemArray * getWorkflowClone() const;
    virtual IConstLocalFileUploadIterator * getLocalFileUploads() const;
    virtual bool requiresLocalFileUpload() const;
    virtual bool getIsQueryService() const;
    virtual IStringVal & getClusterName(IStringVal & str) const;
    virtual unsigned getCombineQueries() const;
    virtual WUCompareMode getCompareMode() const;
    virtual IStringVal & getCustomerId(IStringVal & str) const;
    virtual bool hasDebugValue(const char * propname) const;
    virtual IStringVal & getDebugValue(const char * propname, IStringVal & str) const;
    virtual IStringIterator & getDebugValues() const;
    virtual IStringIterator & getDebugValues(const char *prop) const;
    virtual int getDebugValueInt(const char * propname, int defVal) const;
    virtual __int64 getDebugValueInt64(const char * propname, __int64 defVal) const;
    virtual bool getDebugValueBool(const char * propname, bool defVal) const;
    virtual unsigned getExceptionCount() const;
    virtual IConstWUExceptionIterator & getExceptions() const;
    virtual IConstWUResult * getGlobalByName(const char * name) const;
    virtual unsigned getGraphCount() const;
    virtual unsigned getSourceFileCount() const;
    virtual unsigned getResultCount() const;
    virtual unsigned getVariableCount() const;
    virtual unsigned getTimerCount() const;
    virtual unsigned getApplicationValueCount() const;
    virtual IConstWUGraphIterator & getGraphs(WUGraphType type) const;
    virtual IConstWUGraph * getGraph(const char *name) const;
    virtual IConstWUGraphProgress * getGraphProgress(const char * name) const;
    virtual IStringVal & getJobName(IStringVal & str) const;
    virtual IStringVal & getParentWuid(IStringVal & str) const;
    virtual IConstWUPlugin * getPluginByName(const char * name) const;
    virtual IConstWUPluginIterator & getPlugins() const;
    virtual IConstWULibraryIterator & getLibraries() const;
    virtual WUPriorityClass getPriority() const;
    virtual int getPriorityLevel() const;
    virtual int getPriorityValue() const;
    virtual IConstWUQuery * getQuery() const;
    virtual bool getRescheduleFlag() const;
    virtual IConstWUResult * getResultByName(const char * name) const;
    virtual IConstWUResult * getResultBySequence(unsigned seq) const;
    virtual unsigned getResultLimit() const;
    virtual IConstWUResultIterator & getResults() const;
    virtual IConstWUActivityIterator& getActivities() const;
    virtual IConstWUActivity*   getActivity(__int64 id) const;
    virtual IStringVal & getScope(IStringVal & str) const;
    virtual IStringVal & getSecurityToken(IStringVal & str) const;
    virtual WUState getState() const;
    virtual IStringVal & getStateEx(IStringVal & str) const;
    virtual __int64 getAgentSession() const;
    virtual unsigned getAgentPID() const;
    virtual IStringVal & getStateDesc(IStringVal & str) const;
    virtual IConstWUResult * getTemporaryByName(const char * name) const;
    virtual IConstWUResultIterator & getTemporaries() const;
    virtual unsigned getTimerCount(const char * timerName, const char * instance) const;
    virtual unsigned getTimerDuration(const char * timerName, const char * instance) const;
    virtual IStringIterator & getTimers() const;
    virtual IConstWUTimeStampIterator & getTimeStamps() const;
    virtual IConstWUWebServicesInfo * getWebServicesInfo() const;
    virtual IConstWURoxieQueryInfo * getRoxieQueryInfo() const;
    virtual IStringVal & getXmlParams(IStringVal & params) const;
    virtual const IPropertyTree *getXmlParams() const;
    virtual unsigned __int64 getHash() const;

    virtual bool getWuDate(unsigned & year, unsigned & month, unsigned& day);
    virtual IStringVal & getSnapshot(IStringVal & str) const;

    virtual IStringVal & getTimeStamp(const char * name, const char * instance, IStringVal & str) const;
    virtual IStringVal & getUser(IStringVal & str) const;
    virtual IStringVal & getWuScope(IStringVal & str) const;
    virtual IConstWUResult * getVariableByName(const char * name) const;
    virtual IConstWUResultIterator & getVariables() const;
    virtual IStringVal & getWuid(IStringVal & str) const;
    virtual bool getRunningGraph(IStringVal &graphName, WUGraphIDType &subId) const;
    virtual bool isProtected() const;
    virtual bool isPausing() const;
    virtual bool isBilled() const;
    virtual IWorkUnit& lock();
    virtual bool reload();
    virtual void requestAbort();
    virtual void subscribe(WUSubscribeOptions options);
    virtual unsigned calculateHash(unsigned prevHash);
    virtual void copyWorkUnit(IConstWorkUnit *cached);
    virtual unsigned queryFileUsage(const char *filename) const;
    virtual bool getCloneable() const;
    virtual IUserDescriptor * queryUserDescriptor() const;
    virtual unsigned getCodeVersion() const;
    virtual void getBuildVersion(IStringVal & buildVersion, IStringVal & eclVersion) const;
    virtual IPropertyTree * getDiskUsageStats();
    virtual IPropertyTreeIterator & getFileIterator() const;
    virtual bool archiveWorkUnit(const char *base,bool del,bool ignoredllerrors,bool deleteOwned);
    virtual void packWorkUnit(bool pack=true);
    virtual IJlibDateTime & getTimeScheduled(IJlibDateTime &val) const;
    virtual IPropertyTreeIterator & getFilesReadIterator() const;
    virtual void protect(bool protectMode);
    virtual IConstWULibrary * getLibraryByName(const char * name) const;
    virtual unsigned getDebugAgentListenerPort() const;
    virtual IStringVal & getDebugAgentListenerIP(IStringVal &ip) const;

    void clearExceptions();
    void commit();
    IWUException *createException();
    void setTimeStamp(const char *name, const char *instance, const char *event);
    void addTimeStamp(const char * name, const char * instance, const char *event);
    void setAction(WUAction action);
    void setApplicationValue(const char * application, const char * propname, const char * value, bool overwrite);
    void setApplicationValueInt(const char * application, const char * propname, int value, bool overwrite);
    void incEventScheduledCount();
    void setIsQueryService(bool value);
    void setCloneable(bool value);
    void setIsClone(bool value);
    void setClusterName(const char * value);
    void setCodeVersion(unsigned version, const char * buildVersion, const char * eclVersion);
    void setCombineQueries(unsigned combine);
    void setCompareMode(WUCompareMode value);
    void setCustomerId(const char * value);
    void setDebugValue(const char * propname, const char * value, bool overwrite);
    void setDebugValueInt(const char * propname, int value, bool overwrite);
    void setJobName(const char * value);
    void setPriority(WUPriorityClass cls);
    void setPriorityLevel(int level);
    void setRescheduleFlag(bool value);
    void setResultLimit(unsigned value);
    void setState(WUState state);
    void setStateEx(const char * text);
    void setAgentSession(__int64 sessionId);
    void setAgentPID(unsigned pid);
    void setSecurityToken(const char *value);
    void setTimerInfo(const char * name, const char * instance, unsigned ms, unsigned count, unsigned max);
    void setTracingValue(const char * propname, const char * value);
    void setTracingValueInt(const char * propname, int value);
    void setUser(const char * value);
    void setWuScope(const char * value);
    void setBilled(bool billed);
    void setSnapshot(const char * value);
    void setTimeStamp(const char *application, const char *instance, const char *event, bool add);
    void setDebugAgentListenerPort(unsigned port);
    void setDebugAgentListenerIP(const char * ip);
    void setXmlParams(const char *params);
    void setXmlParams(IPropertyTree *tree);
    void setHash(unsigned __int64 hash);

    IWorkflowItem* addWorkflowItem(unsigned wfid, WFType type, WFMode mode, unsigned success, unsigned failure, unsigned recovery, unsigned retriesAllowed, unsigned contingencyFor);
    IWorkflowItemIterator * updateWorkflowItems();
    void syncRuntimeWorkflow(IWorkflowItemArray * array);
    void resetWorkflow();
    void schedule();
    void deschedule();
    unsigned addLocalFileUpload(LocalFileUploadType type, char const * source, char const * destination, char const * eventTag);
    IWUResult * updateGlobalByName(const char * name);
    IWUGraph * updateGraph(const char * name);
    IWUQuery * updateQuery();
    IWUWebServicesInfo* updateWebServicesInfo(bool create);
    IWURoxieQueryInfo* updateRoxieQueryInfo(const char *wuid, const char *roxieClusterName);
    IWUActivity* updateActivity(__int64 id);
    IWUPlugin * updatePluginByName(const char * name);
    IWULibrary * updateLibraryByName(const char * name);
    IWUResult * updateResultByName(const char * name);
    IWUResult * updateResultBySequence(unsigned seq);
    IWUResult * updateTemporaryByName(const char * name);
    IWUResult * updateVariableByName(const char * name);
    void addFile(const char *fileName, StringArray *clusters, unsigned usageCount, WUFileKind fileKind, const char *graphOwner);
    void noteFileRead(IDistributedFile *file);
    void releaseFile(const char *fileName);
    void clearGraphProgress();
    void resetBeforeGeneration();
    void deleteTempFiles(const char *graph, bool deleteOwned, bool deleteJobOwned);
    void addDiskUsageStats(__int64 avgNodeUsage, unsigned minNode, __int64 minNodeUsage, unsigned maxNode, __int64 maxNodeUsage, __int64 graphId);
    void setTimeScheduled(const IJlibDateTime &val);

// ILocalWorkUnit - used for debugging etc
    void loadXML(const char *xml);
    void serialize(MemoryBuffer &tgt);
    void deserialize(MemoryBuffer &src);

    IWorkUnit &lockRemote(bool commit);
    void unlockRemote(bool closing);
    void notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen=0, const void *valueData=NULL);
    void abort();
    void cleanupAndDelete(bool deldll,bool deleteOwned);
    bool switchThorQueue(const char *cluster, IQueueSwitcher *qs);
    void setAllowedClusters(const char *value);
    IStringVal & getAllowedClusters(IStringVal & str) const;
    void remoteCheckAccess(IUserDescriptor *user, bool writeaccess) const;
    void setAllowAutoQueueSwitch(bool val);
    bool getAllowAutoQueueSwitch() const;
    void setLibraryInformation(const char * name, unsigned interfaceHash, unsigned definitionHash);

private:
    void init();
    IWUGraph *createGraph();
    IWUResult *createResult();
    void loadGraphs() const;
    void loadResults() const;
    void loadTemporaries() const;
    void loadVariables() const;
    void loadExceptions() const;
    void loadPlugins() const;
    void loadLibraries() const;
    void loadClusters() const;
    void loadActivities() const;
    void unsubscribe();
    void checkAgentRunning(WUState & state);

    // MORE - the two could be a bit more similar...

    class CWorkUnitWatcher : public CInterface, implements ISDSSubscription
    {
        ISDSSubscription *parent; // not linked - it links me
        SubscriptionId change;
        bool sub;
    public:
        IMPLEMENT_IINTERFACE;
        CWorkUnitWatcher(ISDSSubscription *_parent, const char *wuid, bool _sub) : parent(_parent), sub(_sub)
        {
            StringBuffer wuRoot;
            getXPath(wuRoot, wuid);
            change = querySDS().subscribe(wuRoot.str(), *this, sub);
        }
        ~CWorkUnitWatcher()
        {
            assertex(change==0);
        }
        bool watchingChildren()
        {
            return sub;
        }
        void unsubscribe()
        {
            querySDS().unsubscribe(change);
            change = 0;
        }

        void notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen, const void *valueData)
        {
            parent->notify(id, xpath, flags, valueLen, valueData);
        }
    };

    class CWorkUnitAbortWatcher : public CInterface, implements ISDSSubscription
    {
        CLocalWorkUnit *parent; // not linked - it links me
        SubscriptionId abort;
    public:
        IMPLEMENT_IINTERFACE;
        CWorkUnitAbortWatcher(CLocalWorkUnit *_parent, const char *wuid) : parent(_parent)
        {
            StringBuffer wuRoot;
            wuRoot.append("/WorkUnitAborts/").append(wuid);
            abort = querySDS().subscribe(wuRoot.str(), *this);
        }
        ~CWorkUnitAbortWatcher()
        {
            assertex(abort==0);
        }

        void unsubscribe()
        {
            querySDS().unsubscribe(abort);
            abort = 0;
        }

        void notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen, const void *valueData)
        {
            parent->abort();
        }
    };
    Owned<CWorkUnitAbortWatcher> abortWatcher;
    Owned<CWorkUnitWatcher> changeWatcher;

    void ensureGraphsUnpacked ()
    {
        IPropertyTree *t = p->queryPropTree("PackedGraphs");
        MemoryBuffer buf;
        if (t&&t->getPropBin(NULL,buf)) {
            cachedGraphs.clear();
            IPropertyTree *st = createPTree(buf);
            if (st) {
                p->setPropTree("Graphs",st);
                p->removeTree(t);
            }
        }
    }

};

class CLockedWorkUnit : public CInterface, implements ILocalWorkUnit, implements IExtendedWUInterface
{
public:
    Owned<CLocalWorkUnit> c;

    IMPLEMENT_IINTERFACE;
    CLockedWorkUnit(CLocalWorkUnit *_c) : c(_c) {}
    ~CLockedWorkUnit()
    {
        if (workUnitTraceLevel > 1)
        {
            StringAttr x;
            StringAttrAdaptor strval(x);
            getWuid(strval);
            PrintLog("Releasing locked workunit %s", x.get());
        }
        if (c)
            c->unlockRemote(c->IsShared());
    }

    void setSecIfcs(ISecManager *mgr, ISecUser*usr){c->setSecIfcs(mgr, usr);}

    virtual IConstWorkUnit * unlock()
    {
        c->unlockRemote(c->IsShared());
        return c.getClear();
    }
    virtual bool aborting() const
            { return c->aborting(); }
    virtual void forceReload()
            { UNIMPLEMENTED; }
    virtual WUAction getAction() const
            { return c->getAction(); }
    virtual IStringVal& getActionEx(IStringVal & str) const
            { return c->getActionEx(str); }
    virtual IStringVal & getApplicationValue(const char * application, const char * propname, IStringVal & str) const
            { return c->getApplicationValue(application, propname, str); }
    virtual int getApplicationValueInt(const char * application, const char * propname, int defVal) const
            { return c->getApplicationValueInt(application, propname, defVal); }
    virtual IConstWUAppValueIterator & getApplicationValues() const 
            { return c->getApplicationValues(); }
    virtual bool hasWorkflow() const
            { return c->hasWorkflow(); }
    virtual unsigned queryEventScheduledCount() const
            { return c->queryEventScheduledCount(); }
    virtual IPropertyTree * queryWorkflowTree() const
            { return c->queryWorkflowTree(); }
    virtual IConstWorkflowItemIterator * getWorkflowItems() const
            { return c->getWorkflowItems(); }
    virtual IWorkflowItemArray * getWorkflowClone() const
            { return c->getWorkflowClone(); }
    virtual bool requiresLocalFileUpload() const
            { return c->requiresLocalFileUpload(); }
    virtual IConstLocalFileUploadIterator * getLocalFileUploads() const
            { return c->getLocalFileUploads(); }
    virtual bool getIsQueryService() const
            { return c->getIsQueryService(); }
    virtual bool getCloneable() const
            { return c->getCloneable(); }
    virtual IUserDescriptor * queryUserDescriptor() const
            { return c->queryUserDescriptor(); }
    virtual IStringVal & getClusterName(IStringVal & str) const
            { return c->getClusterName(str); }
    virtual unsigned getCodeVersion() const
            { return c->getCodeVersion(); }
    virtual void getBuildVersion(IStringVal & buildVersion, IStringVal & eclVersion) const
            { c->getBuildVersion(buildVersion, eclVersion); }
    virtual unsigned getCombineQueries() const
            { return c->getCombineQueries(); }
    virtual WUCompareMode getCompareMode() const
            { return c->getCompareMode(); }
    virtual IStringVal & getCustomerId(IStringVal & str) const
            { return c->getCustomerId(str); }
    virtual bool hasDebugValue(const char * propname) const
            { return c->hasDebugValue(propname); }
    virtual IStringVal & getDebugValue(const char * propname, IStringVal & str) const
            { return c->getDebugValue(propname, str); }
    virtual int getDebugValueInt(const char * propname, int defVal) const
            { return c->getDebugValueInt(propname, defVal); }
    virtual __int64 getDebugValueInt64(const char * propname, __int64 defVal) const
            { return c->getDebugValueInt64(propname, defVal); }
    virtual bool getDebugValueBool(const char * propname, bool defVal) const
            { return c->getDebugValueBool(propname, defVal); }
    virtual IStringIterator & getDebugValues() const 
            { return c->getDebugValues(NULL); }
    virtual IStringIterator & getDebugValues(const char *prop) const 
            { return c->getDebugValues(prop); }
    virtual unsigned getExceptionCount() const
            { return c->getExceptionCount(); }
    virtual IConstWUExceptionIterator & getExceptions() const
            { return c->getExceptions(); }
    virtual unsigned getGraphCount() const
            { return c->getGraphCount(); }
    virtual unsigned getSourceFileCount() const
            { return c->getSourceFileCount(); }
    virtual unsigned getResultCount() const
            { return c->getResultCount(); }
    virtual unsigned getVariableCount() const
            { return c->getVariableCount(); }
    virtual unsigned getTimerCount() const
            { return c->getTimerCount(); }
    virtual unsigned getApplicationValueCount() const
            { return c->getApplicationValueCount(); }
    virtual IConstWUGraphIterator & getGraphs(WUGraphType type) const
            { return c->getGraphs(type); }
    virtual IConstWUGraph * getGraph(const char *name) const
            { return c->getGraph(name); }
    virtual IConstWUGraphProgress * getGraphProgress(const char * name) const
            { return c->getGraphProgress(name); }
    virtual IStringVal & getJobName(IStringVal & str) const
            { return c->getJobName(str); }
    virtual IStringVal & getParentWuid(IStringVal & str) const
            { return c->getParentWuid(str); }
    virtual IConstWUPlugin * getPluginByName(const char * name) const
            { return c->getPluginByName(name); }
    virtual IConstWUPluginIterator & getPlugins() const
            { return c->getPlugins(); }
    virtual IConstWULibrary* getLibraryByName(const char *name) const
            { return c->getLibraryByName(name); }
    virtual IConstWULibraryIterator & getLibraries() const
            { return c->getLibraries(); }
    virtual WUPriorityClass getPriority() const
            { return c->getPriority(); }
    virtual int getPriorityLevel() const
            { return c->getPriorityLevel(); }
    virtual int getPriorityValue() const
            { return c->getPriorityValue(); }
    virtual IConstWUQuery * getQuery() const
            { return c->getQuery(); }
    virtual IConstWUWebServicesInfo * getWebServicesInfo() const
            { return c->getWebServicesInfo(); }
    virtual IConstWURoxieQueryInfo* getRoxieQueryInfo() const
        { return c->getRoxieQueryInfo(); }
    virtual bool getRescheduleFlag() const
            { return c->getRescheduleFlag(); }
    virtual IConstWUResult * getResultByName(const char * name) const
            { return c->getResultByName(name); }
    virtual IConstWUResult * getResultBySequence(unsigned seq) const
            { return c->getResultBySequence(seq); }
    virtual unsigned getResultLimit() const
            { return c->getResultLimit(); }
    virtual IConstWUResultIterator & getResults() const
            { return c->getResults(); }
    virtual IConstWUActivityIterator & getActivities() const
            { return c->getActivities(); }
    virtual IConstWUActivity * getActivity(__int64 id) const
            { return c->getActivity(id); }
    virtual IStringVal & getScope(IStringVal & str) const
            { return c->getScope(str); }
    virtual IStringVal & getSecurityToken(IStringVal & str) const
            { return c->getSecurityToken(str); }
    virtual WUState getState() const
            { return c->getState(); }
    virtual IStringVal & getStateEx(IStringVal & str) const
            { return c->getStateEx(str); }
    virtual __int64 getAgentSession() const
            { return c->getAgentSession(); }
    virtual unsigned getAgentPID() const
            { return c->getAgentPID(); }
    virtual IStringVal & getStateDesc(IStringVal & str) const
            { return c->getStateDesc(str); }
    virtual bool getRunningGraph(IStringVal & graphName, WUGraphIDType & subId) const
            { return c->getRunningGraph(graphName, subId); }
    virtual unsigned getTimerCount(const char * timerName, const char * instance) const
            { return c->getTimerCount(timerName, instance); }
    virtual unsigned getTimerDuration(const char * timerName, const char * instance) const
            { return c->getTimerDuration(timerName, instance); }
    virtual IStringVal & getTimeStamp(const char * name, const char * instance, IStringVal & str) const
            { return c->getTimeStamp(name, instance, str); }
    virtual IStringIterator & getTimers() const
            { return c->getTimers(); }
    virtual IConstWUTimeStampIterator & getTimeStamps() const
            { return c->getTimeStamps(); }

    virtual bool getWuDate(unsigned & year, unsigned & month, unsigned& day)
            { return c->getWuDate(year,month,day);}

    virtual IStringVal & getSnapshot(IStringVal & str) const
            { return c->getSnapshot(str); } 
    virtual IStringVal & getUser(IStringVal & str) const
            { return c->getUser(str); }
    virtual IStringVal & getWuScope(IStringVal & str) const
            { return c->getWuScope(str); }
    virtual IStringVal & getWuid(IStringVal & str) const
            { return c->getWuid(str); }
    virtual IConstWUResult * getGlobalByName(const char * name) const
            { return c->getGlobalByName(name); }
    virtual IConstWUResult * getTemporaryByName(const char * name) const
            { return c->getTemporaryByName(name); }
    virtual IConstWUResultIterator & getTemporaries() const
            { return c->getTemporaries(); }
    virtual IConstWUResult * getVariableByName(const char * name) const
            { return c->getVariableByName(name); }
    virtual IConstWUResultIterator & getVariables() const
            { return c->getVariables(); }
    virtual bool isProtected() const
            { return c->isProtected(); }
    virtual bool isPausing() const
            { return c->isPausing(); }
    virtual bool isBilled() const
            { return c->isBilled(); }
    virtual IWorkUnit & lock()
            { ((CInterface *)this)->Link(); return (IWorkUnit &) *this; }
    virtual bool reload()
            { UNIMPLEMENTED; }
    virtual void subscribe(WUSubscribeOptions options)
            { c->subscribe(options); }
    virtual void requestAbort()
            { c->requestAbort(); }
    virtual unsigned calculateHash(unsigned prevHash)
            { return c->calculateHash(prevHash); }
    virtual void copyWorkUnit(IConstWorkUnit *cached)
            { c->copyWorkUnit(cached); }
    virtual bool archiveWorkUnit(const char *base,bool del,bool deldll,bool deleteOwned)
            { return c->archiveWorkUnit(base,del,deldll,deleteOwned); }
    virtual void packWorkUnit(bool pack)
            { c->packWorkUnit(pack); }
    virtual unsigned queryFileUsage(const char *filename) const
            { return c->queryFileUsage(filename); }
    virtual IJlibDateTime & getTimeScheduled(IJlibDateTime &val) const
            { return c->getTimeScheduled(val); }
    virtual unsigned getDebugAgentListenerPort() const
            { return c->getDebugAgentListenerPort(); }
    virtual IStringVal & getDebugAgentListenerIP(IStringVal &ip) const
            { return c->getDebugAgentListenerIP(ip); }
    virtual IStringVal & getXmlParams(IStringVal & params) const
            { return c->getXmlParams(params); }
    virtual const IPropertyTree *getXmlParams() const
            { return c->getXmlParams(); }
    virtual unsigned __int64 getHash() const
            { return c->getHash(); }

    virtual void clearExceptions()
            { c->clearExceptions(); }
    virtual void commit()
            { c->commit(); }
    virtual IWUException * createException()
            { return c->createException(); }
    virtual void setTimeStamp(const char * name, const char * instance, const char *event)
            { c->setTimeStamp(name, instance, event); }
    virtual void addTimeStamp(const char * name, const char * instance, const char *event)
            { c->addTimeStamp(name, instance, event); }
    virtual void protect(bool protectMode)
            { c->protect(protectMode); }
    virtual void setBilled(bool billed)
            { c->setBilled(billed); }
    virtual void setAction(WUAction action)
            { c->setAction(action); }
    virtual void setApplicationValue(const char * application, const char * propname, const char * value, bool overwrite)
            { c->setApplicationValue(application, propname, value, overwrite); }
    virtual void setApplicationValueInt(const char * application, const char * propname, int value, bool overwrite)
            { c->setApplicationValueInt(application, propname, value, overwrite); }
    virtual void incEventScheduledCount()
            { c->incEventScheduledCount(); }
    virtual void setIsQueryService(bool value)
            { c->setIsQueryService(value); }
    virtual void setCloneable(bool value)
            { c->setCloneable(value); }
    virtual void setIsClone(bool value)
            { c->setIsClone(value); }
    virtual void setClusterName(const char * value)
            { c->setClusterName(value); }
    virtual void setCodeVersion(unsigned version, const char * buildVersion, const char * eclVersion)
            { c->setCodeVersion(version, buildVersion, eclVersion); }
    virtual void setCombineQueries(unsigned combine)
            { c->setCombineQueries(combine); }
    virtual void setCompareMode(WUCompareMode value)
            { c->setCompareMode(value); }
    virtual void setCustomerId(const char * value)
            { c->setCustomerId(value); }
    virtual void setDebugValue(const char * propname, const char * value, bool overwrite)
            { c->setDebugValue(propname, value, overwrite); }
    virtual void setDebugValueInt(const char * propname, int value, bool overwrite)
            { c->setDebugValueInt(propname, value, overwrite); }
    virtual void setJobName(const char * value)
            { c->setJobName(value); }
    virtual void setPriority(WUPriorityClass cls)
            { c->setPriority(cls); }
    virtual void setPriorityLevel(int level)
            { c->setPriorityLevel(level); }
    virtual void setRescheduleFlag(bool value)
            { c->setRescheduleFlag(value); }
    virtual void setResultLimit(unsigned value)
            { c->setResultLimit(value); }
    virtual void setSecurityToken(const char *value)
            { c->setSecurityToken(value); }
    virtual void setState(WUState state)
            { c->setState(state); }
    virtual void setStateEx(const char * text)
            { c->setStateEx(text); }
    virtual void setAgentSession(__int64 sessionId)
            { c->setAgentSession(sessionId); }
    virtual void setAgentPID(unsigned pid)
            { c->setAgentPID(pid); }
    virtual void setTimerInfo(const char * name, const char * instance, unsigned ms, unsigned count, unsigned max)
            { c->setTimerInfo(name, instance, ms, count, max); }
    virtual void setTracingValue(const char * propname, const char * value)
            { c->setTracingValue(propname, value); }
    virtual void setTracingValueInt(const char * propname, int value)
            { c->setTracingValueInt(propname, value); }
    virtual void setUser(const char * value)
            { c->setUser(value); }
    virtual void setWuScope(const char * value)
    {
        if (value && *value)
        {
            ISecManager *secmgr=c->querySecMgr();
            ISecUser *secusr=c->querySecUser();
            if (!secmgr || !secusr)
                throw MakeStringException(WUERR_SecurityNotAvailable, "Trying to change workunit scope without security interfaces available");
            if (checkWuScopeSecAccess(value, *secmgr, secusr, SecAccess_Write, "Change Scope", true, true))
                c->setWuScope(value);
        }
    }
    virtual IWorkflowItem* addWorkflowItem(unsigned wfid, WFType type, WFMode mode, unsigned success, unsigned failure, unsigned recovery, unsigned retriesAllowed, unsigned contingencyFor)
            { return c->addWorkflowItem(wfid, type, mode, success, failure, recovery, retriesAllowed, contingencyFor); }
    virtual void syncRuntimeWorkflow(IWorkflowItemArray * array)
            { c->syncRuntimeWorkflow(array); }
    virtual IWorkflowItemIterator * updateWorkflowItems()
            { return c->updateWorkflowItems(); }
    virtual void resetWorkflow()
            { c->resetWorkflow(); }
    virtual void schedule()
            { c->schedule(); }
    virtual void deschedule()
            { c->deschedule(); }
    virtual unsigned addLocalFileUpload(LocalFileUploadType type, char const * source, char const * destination, char const * eventTag)
            { return c->addLocalFileUpload(type, source, destination, eventTag); }
    virtual IWUResult * updateGlobalByName(const char * name)
            { return c->updateGlobalByName(name); }
    virtual IWUGraph * updateGraph(const char * name) 
            { return c->updateGraph(name); }
    virtual IWUQuery * updateQuery()
            { return c->updateQuery(); }
    virtual IWUWebServicesInfo * updateWebServicesInfo(bool create)
        { return c->updateWebServicesInfo(create); }
    virtual IWURoxieQueryInfo * updateRoxieQueryInfo(const char *wuid, const char *roxieClusterName)
        { return c->updateRoxieQueryInfo(wuid, roxieClusterName); }
    virtual IWUActivity * updateActivity(__int64 id) 
            { return c->updateActivity(id); }
    virtual IWUPlugin * updatePluginByName(const char * name)
            { return c->updatePluginByName(name); }
    virtual IWULibrary * updateLibraryByName(const char * name)
            { return c->updateLibraryByName(name); }
    virtual IWUResult * updateResultByName(const char * name)
            { return c->updateResultByName(name); }
    virtual IWUResult * updateResultBySequence(unsigned seq)
            { return c->updateResultBySequence(seq); }
    virtual IWUResult * updateTemporaryByName(const char * name)
            { return c->updateTemporaryByName(name); }
    virtual IWUResult * updateVariableByName(const char * name)
            { return c->updateVariableByName(name); }
    virtual void addFile(const char *fileName, StringArray *clusters, unsigned usageCount, WUFileKind fileKind, const char *graphOwner)
            { c->addFile(fileName, clusters, usageCount, fileKind, graphOwner); }
    virtual void noteFileRead(IDistributedFile *file)
            { c->noteFileRead(file); }
    virtual void releaseFile(const char *fileName)
            { c->releaseFile(fileName); }
    virtual void clearGraphProgress()
            { c->clearGraphProgress(); }
    virtual void resetBeforeGeneration()
            { c->resetBeforeGeneration(); }
    virtual void deleteTempFiles(const char *graph, bool deleteOwned, bool deleteJobOwned)
            { c->deleteTempFiles(graph, deleteOwned, deleteJobOwned); }
    virtual void addDiskUsageStats(__int64 avgNodeUsage, unsigned minNode, __int64 minNodeUsage, unsigned maxNode, __int64 maxNodeUsage, __int64 graphId)
            { c->addDiskUsageStats(avgNodeUsage, minNode, minNodeUsage, maxNode, maxNodeUsage, graphId); }
    virtual IPropertyTree * getDiskUsageStats()
            { return c->getDiskUsageStats(); }
    virtual IPropertyTreeIterator & getFileIterator() const
            { return c->getFileIterator(); }
    virtual IPropertyTreeIterator & getFilesReadIterator() const
            { return c->getFilesReadIterator(); }

    virtual void setSnapshot(const char * value)
            { c->setSnapshot(value); }
    virtual void setTimeScheduled(const IJlibDateTime &val)
            { c->setTimeScheduled(val); }
    virtual void setDebugAgentListenerPort(unsigned port)
            { c->setDebugAgentListenerPort(port); }
    virtual void setDebugAgentListenerIP(const char * ip)
            { c->setDebugAgentListenerIP(ip); }
    virtual void setXmlParams(const char *params)
            { c->setXmlParams(params); }
    virtual void setXmlParams(IPropertyTree *tree)
            { c->setXmlParams(tree); }
    virtual void setHash(unsigned __int64 hash)
            { c->setHash(hash); }

// ILocalWorkUnit - used for debugging etc
    virtual void loadXML(const char *xml)
            { c->loadXML(xml); }
    virtual void serialize(MemoryBuffer &tgt)
            { c->serialize(tgt); }
    virtual void deserialize(MemoryBuffer &src)
            { c->deserialize(src); }

    virtual bool switchThorQueue(const char *cluster, IQueueSwitcher *qs)
            { return c->switchThorQueue(cluster,qs); }
    virtual void setAllowedClusters(const char *value)
            { c->setAllowedClusters(value); }
    virtual IStringVal& getAllowedClusters(IStringVal &str) const
            { return c->getAllowedClusters(str); }
    virtual void remoteCheckAccess(IUserDescriptor *user, bool writeaccess) const
            { c->remoteCheckAccess(user,writeaccess); }
    virtual void setAllowAutoQueueSwitch(bool val)
            { c->setAllowAutoQueueSwitch(val); }
    virtual bool getAllowAutoQueueSwitch() const
            { return c->getAllowAutoQueueSwitch(); }
    virtual void setLibraryInformation(const char * name, unsigned interfaceHash, unsigned definitionHash)
            { c->setLibraryInformation(name, interfaceHash, definitionHash); }

    virtual void setResultInt(const char * name, unsigned sequence, __int64 val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultInt(val);   
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultUInt(const char * name, unsigned sequence, unsigned __int64 val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultUInt(val);  
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultReal(const char *name, unsigned sequence, double val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultReal(val);  
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultVarString(const char * stepname, unsigned sequence, const char *val)
    {
        setResultString(stepname, sequence, strlen(val), val);
    }
    virtual void setResultVarUnicode(const char * stepname, unsigned sequence, UChar const *val)
    {
        setResultUnicode(stepname, sequence, rtlUnicodeStrlen(val), val);
    }
    virtual void setResultString(const char * stepname, unsigned sequence, int len, const char *val)
    {
        doSetResultString(type_string, stepname, sequence, len, val);
    }
    virtual void setResultData(const char * stepname, unsigned sequence, int len, const void *val)
    {
        doSetResultString(type_data, stepname, sequence, len, (const char *)val);
    }
    virtual void setResultRaw(const char * name, unsigned sequence, int len, const void *val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultRaw(len, val, ResultFormatRaw); 
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultSet(const char * name, unsigned sequence, bool isAll, size32_t len, const void *val, ISetToXmlTransformer *)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultIsAll(isAll);
            r->setResultRaw(len, val, ResultFormatRaw); 
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultUnicode(const char * name, unsigned sequence, int len, UChar const * val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultUnicode((char const *)val, len);
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultBool(const char *name, unsigned sequence, bool val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultBool(val);
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultDecimal(const char *name, unsigned sequence, int len, int precision, bool isSigned, const void *val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultDecimal(val, len);
            r->setResultStatus(ResultStatusCalculated);
        }
    }
    virtual void setResultDataset(const char * name, unsigned sequence, size32_t len, const void *val, unsigned numRows, bool extend)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            __int64 totalRows = numRows;
            if (extend)
            {
                totalRows += r->getResultRowCount();
                r->addResultRaw(len, val, ResultFormatRaw);
            }
            else
                r->setResultRaw(len, val, ResultFormatRaw);

            r->setResultStatus(ResultStatusCalculated);
            r->setResultRowCount(totalRows);
            r->setResultTotalRowCount(totalRows);
        }
    }

protected:
    IWUResult *updateResult(const char *name, unsigned sequence)
    {
        Owned <IWUResult> result = updateWorkUnitResult(this, name, sequence);
        if (result)
        {
            SCMStringBuffer rname;
            if (!result->getResultName(rname).length())
                result->setResultName(name);
        }
        return result.getClear();
    }

    void doSetResultString(type_t type, const char *name, unsigned sequence, int len, const char *val)
    {
        Owned<IWUResult> r = updateResult(name, sequence);
        if (r)
        {
            r->setResultString(val, len);   
            r->setResultStatus(ResultStatusCalculated);
        }
    }

};

class CLocalWUAssociated : public CInterface, implements IConstWUAssociatedFile
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUAssociated(IPropertyTree *p);

    virtual WUFileType getType() const;
    virtual IStringVal & getDescription(IStringVal & ret) const;
    virtual IStringVal & getIp(IStringVal & ret) const;
    virtual IStringVal & getName(IStringVal & ret) const;
    virtual IStringVal & getNameTail(IStringVal & ret) const;
    virtual unsigned getCrc() const;
};

class CLocalWUQuery : public CInterface, implements IWUQuery
{
    Owned<IPropertyTree> p;
    mutable IArrayOf<IConstWUAssociatedFile> associated;
    mutable CriticalSection crit;
    mutable bool associatedCached;

private:
    void addSpecialCaseAssociated(WUFileType type, const char * propname, unsigned crc) const;
    void loadAssociated() const;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUQuery(IPropertyTree *p);

    virtual WUQueryType getQueryType() const;
    virtual IStringVal& getQueryText(IStringVal &str) const;
    virtual IStringVal& getQueryShortText(IStringVal &str) const;
    virtual IStringVal& getQueryName(IStringVal &str) const;
    virtual IStringVal & getQueryMainDefinition(IStringVal & str) const;
    virtual IStringVal& getQueryDllName(IStringVal &str) const;
    virtual unsigned getQueryDllCrc() const;
    virtual IStringVal& getQueryCppName(IStringVal &str) const;
    virtual IStringVal& getQueryResTxtName(IStringVal &str) const;
    virtual IConstWUAssociatedFile * getAssociatedFile(WUFileType type, unsigned index) const;
    virtual IConstWUAssociatedFileIterator& getAssociatedFiles() const;

    virtual void        setQueryType(WUQueryType qt);
    virtual void        setQueryText(const char *pstr);
    virtual void        setQueryName(const char *);
    virtual void        setQueryMainDefinition(const char * str);
    virtual void        addAssociatedFile(WUFileType type, const char * name, const char * ip, const char * desc, unsigned crc);
    virtual void        removeAssociatedFiles();
};

class CLocalWUWebServicesInfo : public CInterface, implements IWUWebServicesInfo
{
    Owned<IPropertyTree> p;
    mutable CriticalSection crit;

private:
    
public:
    IMPLEMENT_IINTERFACE;
    CLocalWUWebServicesInfo(IPropertyTree *p);

    virtual IStringVal& getModuleName(IStringVal &str) const;
    virtual IStringVal& getAttributeName(IStringVal &str) const;
    virtual IStringVal& getDefaultName(IStringVal &str) const;
    virtual IStringVal& getInfo(const char *name, IStringVal &str) const;
    virtual unsigned getWebServicesCRC() const;
 
    virtual void        setModuleName(const char *);
    virtual void        setAttributeName(const char *);
    virtual void        setDefaultName(const char *);
    virtual void        setInfo(const char *name, const char *info);
    virtual void        setWebServicesCRC(unsigned);
};

class CLocalWURoxieQueryInfo : public CInterface, implements IWURoxieQueryInfo
{
    Owned<IPropertyTree> p;
    mutable CriticalSection crit;

private:
    
public:
    IMPLEMENT_IINTERFACE;
    CLocalWURoxieQueryInfo(IPropertyTree *p);

    virtual IStringVal& getQueryInfo(IStringVal &str) const;
    virtual IStringVal& getDefaultPackageInfo(IStringVal &str) const;
    virtual IStringVal& getRoxieClusterName(IStringVal &str) const;
    virtual IStringVal& getWuid(IStringVal &str) const;

    virtual void        setQueryInfo(const char *info); 
    virtual void        setDefaultPackageInfo(const char *, int len);
    virtual void        setRoxieClusterName(const char *str);
    virtual void        setWuid(const char *str);

};

class CLocalWUResult : public CInterface, implements IWUResult
{
    friend class CLocalWorkUnit;

    Owned<IPropertyTree> p;
    void getSchema(TypeInfoArray &types, StringAttrArray &names, IStringVal * ecl=NULL) const;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUResult(IPropertyTree *props);
    ~CLocalWUResult() { try { p.clear(); } catch (IException *E) {E->Release();}}

    virtual WUResultStatus getResultStatus() const;
    virtual IStringVal& getResultName(IStringVal &str) const;
    virtual int         getResultSequence() const;
    virtual bool        isResultScalar() const;
    virtual IStringVal& getResultXml(IStringVal &str) const;
    virtual unsigned    getResultFetchSize() const;
    virtual __int64     getResultTotalRowCount() const;
    virtual __int64     getResultRowCount() const;
    virtual void        getResultDataset(IStringVal & ecl, IStringVal & defs) const;
    virtual IStringVal& getResultLogicalName(IStringVal &ecl) const;
    virtual IStringVal& getResultKeyField(IStringVal& ecl) const;
    virtual unsigned    getResultRequestedRows() const;

    virtual __int64     getResultInt() const;
    virtual bool        getResultBool() const;
    virtual double      getResultReal() const;
    virtual IStringVal& getResultString(IStringVal & str) const;
    virtual IDataVal&   getResultRaw(IDataVal & data, IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const;
    virtual IDataVal&   getResultUnicode(IDataVal & data) const;
    virtual void        getResultDecimal(void * val, unsigned length, unsigned precision, bool isSigned) const;
    virtual IStringVal& getResultEclSchema(IStringVal & str) const;
    virtual __int64     getResultRawSize(IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const;
    virtual IDataVal&   getResultRaw(IDataVal & data, __int64 from, __int64 length, IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const;
    virtual IStringVal& getResultRecordSizeEntry(IStringVal & str) const;
    virtual IStringVal& getResultTransformerEntry(IStringVal & str) const;
    virtual __int64     getResultRowLimit() const;
    virtual IStringVal& getResultFilename(IStringVal & str) const;
    virtual WUResultFormat getResultFormat() const;
    virtual unsigned    getResultHash() const;
    virtual bool        getResultIsAll() const;

    // interface IWUResult
    virtual void        setResultStatus(WUResultStatus status);
    virtual void        setResultName(const char *name);
    virtual void        setResultSequence(unsigned seq);
    virtual void        setResultSchemaRaw(unsigned len, const void *schema);
    virtual void        setResultScalar(bool isScalar);
    virtual void        setResultRaw(unsigned len, const void *xml, WUResultFormat format);
    virtual void        setResultFetchSize(unsigned rows);      // 0 means file-loaded
    virtual void        setResultTotalRowCount(__int64 rows);   // -1 means unknown
    virtual void        setResultRowCount(__int64 rows);
    virtual void        setResultDataset(const char *ecl, const char *defs);        
    virtual void        setResultLogicalName(const char *logicalName);
    virtual void        setResultKeyField(const char * name);
    virtual void        setResultRequestedRows(unsigned req);
    virtual void        setResultRecordSizeEntry(const char * val);
    virtual void        setResultTransformerEntry(const char * val);
    virtual void        setResultInt(__int64 val);
    virtual void        setResultReal(double val);
    virtual void        setResultBool(bool val);
    virtual void        setResultString(const char * val, unsigned length);
    virtual void        setResultUnicode(const void * val, unsigned length);
    virtual void        setResultData(const void * val, unsigned length);
    virtual void        setResultDecimal(const void * val, unsigned length);
    virtual void        addResultRaw(unsigned len, const void * data, WUResultFormat format);
    virtual void        setResultRowLimit(__int64 value);
    virtual void        setResultFilename(const char * name);
    virtual void        setResultUInt(unsigned __int64 val);
    virtual void        setResultIsAll(bool value);
    virtual void        setResultFormat(WUResultFormat format);
    virtual void        setResultXML(const char *val);
};

class CLocalWUPlugin : public CInterface, implements IWUPlugin
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUPlugin(IPropertyTree *p);

    virtual IStringVal& getPluginName(IStringVal &str) const;
    virtual IStringVal& getPluginVersion(IStringVal &str) const;
    virtual bool        getPluginThor() const;
    virtual bool        getPluginHole() const;

    virtual void        setPluginName(const char *str);
    virtual void        setPluginVersion(const char *str);
    virtual void        setPluginThor(bool on);
    virtual void        setPluginHole(bool on);
};

class CLocalWULibrary : public CInterface, implements IWULibrary
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWULibrary(IPropertyTree *p);

    virtual IStringVal & getName(IStringVal & str) const;
    virtual IConstWULibraryActivityIterator * getActivities() const;

    virtual void setName(const char * str);
    virtual void addActivity(unsigned id);
};

class CLocalWUGraph : public CInterface, implements IWUGraph
{
    Owned<IPropertyTree> p;
    mutable Linked<IConstWUGraphProgress> progress;
    StringAttr wuid;

    void mergeProgress(IPropertyTree &tree, IPropertyTree &progressTree, const unsigned &progressV) const;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUGraph(IPropertyTree *p, const char *wuid);

    virtual IStringVal & getXGMML(IStringVal & ret, bool mergeProgress) const;
    virtual IStringVal & getDOT(IStringVal & ret) const;
    virtual IStringVal & getName(IStringVal & ret) const;
    virtual IStringVal & getLabel(IStringVal & ret) const;
    virtual IStringVal & getTypeName(IStringVal & ret) const;
    virtual WUGraphType getType() const;
    virtual IPropertyTree * getXGMMLTree(bool mergeProgress) const;
    virtual bool isValid() const;

    virtual void setName(const char *str);
    virtual void setType(WUGraphType type);
    virtual void setXGMML(const char *str);
    virtual void setXGMMLTree(IPropertyTree * tree);
};

class CLocalWUActivity : public CInterface, implements IWUActivity
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUActivity(IPropertyTree *p, __int64 id = 0);

    virtual __int64 getId() const;
    virtual unsigned getKind() const;
    virtual IStringVal & getHelper(IStringVal & ret) const;

    virtual void setKind(unsigned id);
    virtual void setHelper(const char * str);
};

class CLocalWUException : public CInterface, implements IWUException
{
    Owned<IPropertyTree> p;

public:
    IMPLEMENT_IINTERFACE;
    CLocalWUException(IPropertyTree *p);

    virtual IStringVal& getExceptionSource(IStringVal &str) const;
    virtual IStringVal& getExceptionMessage(IStringVal &str) const;
    virtual unsigned    getExceptionCode() const;
    virtual WUExceptionSeverity getSeverity() const;
    virtual IStringVal & getTimeStamp(IStringVal & dt) const;
    virtual IStringVal & getExceptionFileName(IStringVal & str) const;
    virtual unsigned    getExceptionLineNo() const;
    virtual unsigned    getExceptionColumn() const;
    virtual void        setExceptionSource(const char *str);
    virtual void        setExceptionMessage(const char *str);
    virtual void        setExceptionCode(unsigned code);
    virtual void        setSeverity(WUExceptionSeverity level);
    virtual void        setTimeStamp(const char * dt);
    virtual void        setExceptionFileName(const char *str);
    virtual void        setExceptionLineNo(unsigned r);
    virtual void        setExceptionColumn(unsigned c);
};

//==========================================================================================

extern WORKUNIT_API bool isSpecialResultSequence(unsigned sequence)
{
    switch (sequence)
    {
    case ResultSequenceInternal:
    case ResultSequenceOnce:
    case ResultSequencePersist:
    case ResultSequenceStored:
        return true;
    default:
        assertex(sequence <= INT_MAX);
        return false;
    }
}

struct mapEnums { int val; const char *str; };

const char *getEnumText(int value, mapEnums *map) 
{
    const char *defval = map->str;
    while (map->str)
    {
        if (value==map->val)
            return map->str;
        map++;
    }
    assertex(!"Unexpected value in setEnum");
    return defval;
}

void setEnum(IPropertyTree *p, const char *propname, int value, mapEnums *map) 
{
    const char *defval = map->str;
    while (map->str)
    {
        if (value==map->val)
        {
            p->setProp(propname, map->str);
            return;
        }
        map++;
    }
    assertex(!"Unexpected value in setEnum");
    p->setProp(propname, defval);
}

static int getEnum(const char *v, mapEnums *map) 
{
    if (v)
    {
        while (map->str)
        {
            if (stricmp(v, map->str)==0)
                return map->val;
            map++;
        }
        assertex(!"Unexpected value in getEnum");
    }
    return 0;
}

static int getEnum(IPropertyTree *p, const char *propname, mapEnums *map) 
{
    return getEnum(p->queryProp(propname),map);
}

//==========================================================================================

class CConstWUArrayIterator : public CInterface, implements IConstWorkUnitIterator
{
    IArrayOf<IConstWorkUnit> w;
    CArrayIteratorOf<IConstWorkUnit,IConstWorkUnitIterator> it;
public:
    IMPLEMENT_IINTERFACE;
    CConstWUArrayIterator(IRemoteConnection *conn, IArrayOf<IPropertyTree> &trees, ISecManager *secmgr=NULL, ISecUser *secuser=NULL) 
        : it(w)
    {
        ForEachItemIn(i,trees) {
            IPropertyTree &tree = trees.item(i);
            tree.Link();
            w.append(*(IConstWorkUnit *) new CLocalWorkUnit(LINK(conn), &tree, secmgr, secuser));
        }
    }
    bool first() { return it.first(); }
    bool isValid() { return it.isValid(); }
    bool next() { return it.next(); }
    IConstWorkUnit & query() { return it.query();}
};
//==========================================================================================

class CStringArrayIterator : public CInterface, implements IStringIterator
{
    StringArray strings;
    unsigned idx;
public:
    IMPLEMENT_IINTERFACE;
    CStringArrayIterator() { idx = 0; };
    void append(const char *str) { strings.append(str); }
    virtual bool first() { idx = 0; return strings.isItem(idx); }
    virtual bool next() { idx ++; return strings.isItem(idx); }
    virtual bool isValid() { return strings.isItem(idx); }
    virtual IStringVal & str(IStringVal &s) { s.set(strings.item(idx)); return s; }
};

class CCachedJobNameIterator : public CInterface, implements IStringIterator
{
    Owned<IPropertyTreeIterator> it;
public:
    IMPLEMENT_IINTERFACE;
    CCachedJobNameIterator(IPropertyTreeIterator *p) : it(p) {};
    virtual bool first() { return it->first(); }
    virtual bool next() { return it->next(); }
    virtual bool isValid() { return it->isValid(); }
    virtual IStringVal & str(IStringVal &s) { s.set(it->query().queryName()+1); return s; }
};

class CEmptyStringIterator : public CInterface, implements IStringIterator
{
public:
    IMPLEMENT_IINTERFACE;
    virtual bool first() { return false; }
    virtual bool next() { return false; }
    virtual bool isValid() { return false; }
    virtual IStringVal & str(IStringVal &s) { s.clear(); return s; }
};

mapEnums sortFields[] = 
{
   { WUSFuser, "@submitID" },
   { WUSFcluster, "@clusterName" },
   { WUSFjob, "@jobName" },
   { WUSFstate, "@state" },
   { WUSFpriority, "@priorityClass" },
   { WUSFprotected, "@protected" },
   { WUSFwuid, "@" },
   { WUSFfileread, "FilesRead/File/@name" },
   { WUSFroxiecluster, "RoxieQueryInfo/@roxieClusterName" },
   { WUSFbatchloginid, "Application/Dispatcher/FTPUserID" },
   { WUSFbatchcustomername, "Application/Dispatcher/CustomerName" },
   { WUSFbatchpriority, "Application/Dispatcher/JobPriority" },
   { WUSFbatchinputreccount, "Application/Dispatcher/InputRecords" },
   { WUSFbatchtimeuploaded, "Application/Dispatcher/TimeUploaded" },
   { WUSFbatchtimecompleted, "Application/Dispatcher/TimeCompleted" },
   { WUSFbatchmachine, "Application/Dispatcher/Machine" },
   { WUSFbatchinputfile, "Application/Dispatcher/InputFileName" },
   { WUSFbatchoutputfile, "Application/Dispatcher/OutputFileName" },
   { WUSFtotalthortime, "Timings/Timing[@name='Total thor time']/@duration" },
   { WUSFterm, NULL }
};

class asyncRemoveDllWorkItem: public CInterface, implements IWorkQueueItem // class only used in asyncRemoveDll
{
    StringAttr name;
    bool removeDlls;
    bool removeDirectory;
public:
    IMPLEMENT_IINTERFACE;

    asyncRemoveDllWorkItem(const char * _name, bool _removeDlls, bool _removeDirectory)
        : name(_name)
    {
        removeDlls = _removeDlls;
        removeDirectory = _removeDirectory;
    }
    void execute()
    {
        PROGLOG("WU removeDll %s",name.get());
        queryDllServer().removeDll(name,removeDlls,removeDirectory);
    }
};      


class CWorkUnitFactory : public CInterface, implements IWorkUnitFactory, implements IDaliClientShutdown
{
    Owned<IWorkQueueThread> deletedllworkq;
public:
    IMPLEMENT_IINTERFACE;

    CWorkUnitFactory()
    {
        // Assumes dali client configuration has already been done
        sdsManager = &querySDS();
        session = myProcessSession();
        deletedllworkq.setown(createWorkQueueThread());
        addShutdownHook(*this);
    }

    ~CWorkUnitFactory()
    {
        removeShutdownHook(*this);
        // deletepool->joinAll();
    }
    void clientShutdown();
    SessionId startSession()
    {
        // Temporary placeholder until startSession is implemented
#ifdef _WIN32
        return GetTickCount();
#else
        struct timeval tm;
        gettimeofday(&tm,NULL);
        return tm.tv_usec;
#endif
    }
    IWorkUnit* ensureNamedWorkUnit(const char *name)
    {
        if (workUnitTraceLevel > 1)
            PrintLog("ensureNamedWorkUnit created %s", name);
        StringBuffer wuRoot;
        getXPath(wuRoot, name);
        IRemoteConnection* conn = sdsManager->connect(wuRoot.str(), session, RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);
        conn->queryRoot()->setProp("@xmlns:xsi", "http://www.w3.org/1999/XMLSchema-instance");
        Owned<CLocalWorkUnit> cw = new CLocalWorkUnit(conn, (ISecManager *)NULL, NULL, (const char *)NULL);
        return &cw->lockRemote(false);
    }

    virtual IWorkUnit* createNamedWorkUnit(const char *wuid,const char *parentWuid, const char *app, const char *user)
    {
        StringBuffer wuRoot;
        getXPath(wuRoot, wuid);
        IRemoteConnection *conn;
        if (queryDaliServerVersion().compare("2.0") >= 0)
             conn = sdsManager->connect(wuRoot.str(), session, RTM_LOCK_WRITE|RTM_CREATE_UNIQUE, SDS_LOCK_TIMEOUT);
        else
            conn = sdsManager->connect(wuRoot.str(), session, RTM_LOCK_WRITE|RTM_CREATE, SDS_LOCK_TIMEOUT);
        conn->queryRoot()->setProp("@xmlns:xsi", "http://www.w3.org/1999/XMLSchema-instance");
        Owned<CLocalWorkUnit> cw = new CLocalWorkUnit(conn, (ISecManager*)NULL, NULL, parentWuid);
        IWorkUnit* ret = &cw->lockRemote(false);
        ret->setDebugValue("CREATED_BY", app, true);
        ret->setDebugValue("CREATED_FOR", user, true);
        if (user)
            cw->setWuScope(user);
        return ret;
    }
    virtual IWorkUnit* createWorkUnit(const char *parentWuid, const char *app, const char *user)
    {
        StringBuffer wuid("W");
        char result[32];
        time_t ltime;
        time( &ltime );
        tm *today = localtime( &ltime );   // MORE - this is not threadsafe. But I probably don't care that much!
        strftime(result, sizeof(result), "%Y%m%d-%H%M%S", today);
        wuid.append(result);
        if (queryDaliServerVersion().compare("2.0") < 0)
            wuid.append('-').append(startSession());
        if (workUnitTraceLevel > 1)
            PrintLog("createWorkUnit created %s", wuid.str());
        IWorkUnit* ret = createNamedWorkUnit(wuid.str(),parentWuid, app, user);
        if (workUnitTraceLevel > 1)
        {
            SCMStringBuffer wuidName;
            ret->getWuid(wuidName);
            PrintLog("createWorkUnit created %s", wuidName.str());
        }
        ret->addTimeStamp("workunit", NULL, "Created");
        return ret;
    }
    bool secDeleteWorkUnit(const char * wuid, ISecManager *secmgr, ISecUser *secuser, bool raiseexceptions)
    {
        if (workUnitTraceLevel > 1)
            PrintLog("deleteWorkUnit %s", wuid);
        StringBuffer wuRoot;
        getXPath(wuRoot, wuid);
        IRemoteConnection *conn = sdsManager->connect(wuRoot.str(), session, RTM_LOCK_WRITE|RTM_LOCK_SUB, SDS_LOCK_TIMEOUT);
        if (!conn)
        {
            if (workUnitTraceLevel > 0)
                PrintLog("deleteWorkUnit %s not found", wuid);
            return false;
        }
        Owned<CLocalWorkUnit> cw = new CLocalWorkUnit(conn, secmgr, secuser); // takes ownership of conn
        if (secmgr && !checkWuSecAccess(*cw.get(), *secmgr, secuser, SecAccess_Full, "delete", true, true)) {
            if (raiseexceptions) {
                // perhaps raise exception here?
            }
            return false;
        }
        if (raiseexceptions) {
            try
            {
                cw->cleanupAndDelete(true,true);
            }
            catch (IException *E)
            {
                StringBuffer s;
                LOG(MCexception(E, MSGCLS_warning), E, s.append("Exception during deleteWorkUnit: ").append(wuid).str());
                E->Release();
                return false;
            }
        }
        else
            cw->cleanupAndDelete(true,true);
        return true;
    }

    virtual bool deleteWorkUnitEx(const char * wuid)
    {
        return secDeleteWorkUnit(wuid,NULL,NULL,true);
    }
    virtual bool deleteWorkUnit(const char * wuid)
    {
        return secDeleteWorkUnit(wuid,NULL,NULL,false);
    }
    virtual IConstWorkUnitIterator * getWorkUnitsByOwner(const char * owner)
    {
        // Not sure what to do about customerID vs user etc
        StringBuffer path("*");
        if (owner && *owner)
            path.append("[@submitID=\"").append(owner).append("\"]");
        return getWorkUnitsByXPath(path.str());
    }
    virtual IConstWorkUnitIterator * getWorkUnitsByState(WUState state);
    virtual IConstWorkUnitIterator * getWorkUnitsByECL(const char* ecl)
    {
        StringBuffer path("*");
        if (ecl && *ecl)
            path.append("[Query/Text=~\"*").append(ecl).append("*\"]");
        return getWorkUnitsByXPath(path.str());
    }
    virtual IConstWorkUnitIterator * getWorkUnitsByCluster(const char* cluster)
    {
        StringBuffer path("*");
        if (cluster && *cluster)
            path.append("[@clusterName=\"").append(cluster).append("\"]");
        return getWorkUnitsByXPath(path.str());
    }

    virtual IConstWorkUnitIterator * getChildWorkUnits(const char *parent)
    {
        StringBuffer path("*[@parent=\"");
        path.append(parent).append("\"]");
        return getWorkUnitsByXPath(path.str());
    }
    virtual IConstWorkUnit* secOpenWorkUnit(const char *wuid, bool lock, ISecManager *secmgr=NULL, ISecUser *secuser=NULL)
    {
        if (workUnitTraceLevel > 1)
            PrintLog("openWorkUnit %s", wuid);
        StringBuffer wuRoot;
        getXPath(wuRoot, wuid);
        IRemoteConnection* conn = sdsManager->connect(wuRoot.str(), session, lock ? RTM_LOCK_READ|RTM_LOCK_SUB : 0, SDS_LOCK_TIMEOUT);
        if (conn)
        {
            CLocalWorkUnit *wu = new CLocalWorkUnit(conn, secmgr, secuser);
            if (secmgr && wu)
            {
                if (!checkWuSecAccess(*wu, *secmgr, secuser, SecAccess_Read, "opening", true, true))
                {
                    delete wu;
                    return NULL;
                }
            }
            return wu;
        }
        else
        {
            if (workUnitTraceLevel > 0)
                PrintLog("openWorkUnit %s not found", wuid);
            return NULL;
        }
    }
    virtual IConstWorkUnit* openWorkUnit(const char *wuid, bool lock)
    {
        return secOpenWorkUnit(wuid, lock);
    }
    virtual IWorkUnit* secUpdateWorkUnit(const char *wuid, ISecManager *secmgr=NULL, ISecUser *secuser=NULL)
    {
        if (workUnitTraceLevel > 1)
            PrintLog("updateWorkUnit %s", wuid);
        StringBuffer wuRoot;
        getXPath(wuRoot, wuid);
        IRemoteConnection* conn = sdsManager->connect(wuRoot.str(), session, RTM_LOCK_WRITE|RTM_LOCK_SUB, SDS_LOCK_TIMEOUT);
        if (conn)
        {
            Owned<CLocalWorkUnit> cw = new CLocalWorkUnit(conn, secmgr, secuser);
            if (secmgr && cw)
            {
                if (!checkWuSecAccess(*cw.get(), *secmgr, secuser, SecAccess_Write, "updating", true, true))
                    return NULL;
            }
            return &cw->lockRemote(false);
        }
        else
        {
            if (workUnitTraceLevel > 0)
                PrintLog("updateWorkUnit %s not found", wuid);
            return NULL;
        }
    }
    virtual IWorkUnit* updateWorkUnit(const char *wuid)
    {
        return secUpdateWorkUnit(wuid);
    }
    virtual int setTracingLevel(int newLevel)
    {
        if (newLevel)
            PrintLog("Setting workunit trace level to %d", newLevel);
        int level = workUnitTraceLevel;
        workUnitTraceLevel = newLevel;
        return level;
    }
    IConstWorkUnitIterator * getWorkUnitsByXPath(const char *xpath)
    {
        return getWorkUnitsByXPath(xpath,NULL,NULL);
    }

    void descheduleAllWorkUnits()
    {
        Owned<IRemoteConnection> conn = querySDS().connect("/Schedule", myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
        if(!conn) return;
        Owned<IPropertyTree> root(conn->queryRoot()->getBranch("."));
        KeptAtomTable entries;
        Owned<IPropertyTreeIterator> iter(root->getElements("*/*/*/*"));
        StringBuffer wuid;
        for(iter->first(); iter->isValid(); iter->next())
        {
            char const * entry = iter->query().queryName();
            if(!entries.find(entry))
            {
                entries.addAtom(entry);
                ncnameUnescape(entry, wuid.clear());
                Owned<IWorkUnit> wu = updateWorkUnit(wuid);
                if(wu && (wu->getState() == WUStateWait))
                    wu->setState(WUStateCompleted);
            }
        }
        bool more;
        do more = root->removeProp("*"); while(more);
    }

    IConstWorkUnitIterator * getWorkUnitsByXPath(const char *xpath, ISecManager *secmgr, ISecUser *secuser)
    {
        Owned<IRemoteConnection> conn = sdsManager->connect("/WorkUnits", session, 0, SDS_LOCK_TIMEOUT);
        if (conn)
        {
            CDaliVersion serverVersionNeeded("3.2");
            Owned<IPropertyTreeIterator> iter(queryDaliServerVersion().compare(serverVersionNeeded) < 0 ? 
                conn->queryRoot()->getElements(xpath) : 
                conn->getElements(xpath));
            return new CConstWUIterator(conn, NULL, iter, secmgr, secuser);
        }
        else
            return NULL;
    }

    IConstWorkUnitIterator* getWorkUnitsSorted( WUSortField *sortorder, // list of fields to sort by (terminated by WUSFterm)
                                                WUSortField *filters,   // NULL or list of fields to folteron (terminated by WUSFterm)
                                                const void *filterbuf,  // (appended) string values for filters
                                                unsigned startoffset,
                                                unsigned maxnum,
                                                const char *queryowner, 
                                                __int64 *cachehint,
                                                ISecManager *secmgr, 
                                                ISecUser *secuser)
    {
        class cScopeChecker: implements ISortedElementsTreeFilter
        {
            UniqueScopes done;
            ISecManager *secmgr;
            ISecUser *secuser;
        public:
            cScopeChecker(ISecManager *_secmgr,ISecUser *_secuser)
            {
                secmgr = _secmgr;
                secuser = _secuser;
            }
            bool isOK(IPropertyTree &tree)
            {
                const char *scopename = tree.queryProp("@scope");
                if (!scopename||!*scopename)
                    return true;
                const bool *b = done.getValue(scopename);
                if (b)
                    return *b;
                bool ret = checkWuScopeSecAccess(scopename,*secmgr,secuser,SecAccess_Read,"iterating",false,false);
                done.setValue(scopename,ret);
                return ret;
            }
        } sc(secmgr,secuser);
        StringBuffer query("*");
        StringBuffer so;
        StringAttr namefilterlo;
        StringAttr namefilterhi;
        if (filters) {
            const char *fv = (const char *)filterbuf;
            for (unsigned i=0;filters[i]!=WUSFterm;i++) {
                int fmt = filters[i];
                int subfmt = (fmt&0xff);
                if (subfmt==WUSFwuid) 
                    namefilterlo.set(fv);
                else if (subfmt==WUSFwuidhigh) 
                    namefilterhi.set(fv);
                else {
                    query.append('[').append(getEnumText(subfmt,sortFields)).append('=');
                    if (fmt&WUSFnocase)
                        query.append('?');
                    if (fmt&WUSFwild)
                        query.append('~');
                    query.append('"').append(fv).append("\"]");
                }
                fv = fv + strlen(fv)+1;
            }
        }
        if (sortorder) {
            for (unsigned i=0;sortorder[i]!=WUSFterm;i++) {
                if (so.length())
                    so.append(',');
                int fmt = sortorder[i];
                if (fmt&WUSFreverse) 
                    so.append('-');
                if (fmt&WUSFnocase) 
                    so.append('~');
                if (fmt&WUSFnumeric) 
                    so.append('#');
                so.append(getEnumText(fmt&0xff,sortFields));
            }
        }
        IArrayOf<IPropertyTree> results;
        Owned<IRemoteConnection> conn=getElementsPaged( "WorkUnits", query.str(), so.length()?so.str():NULL,startoffset,maxnum,
            secmgr?&sc:NULL,queryowner,cachehint,namefilterlo.get(),namefilterhi.get(),results);
        return new CConstWUArrayIterator(conn, results, secmgr, secuser);
    }

    
    IConstWorkUnitIterator* getWorkUnitsSorted( WUSortField *sortorder, // list of fields to sort by (terminated by WUSFterm)
                                                WUSortField *filters,   // NULL or list of fields to filter on (terminated by WUSFterm)
                                                const void *filterbuf,  // (appended) string values for filters
                                                unsigned startoffset,
                                                unsigned maxnum,
                                                const char *queryowner, 
                                                __int64 *cachehint)
    {
        return getWorkUnitsSorted(sortorder,filters,filterbuf,startoffset,maxnum,queryowner,cachehint, NULL, NULL);
    }

    virtual unsigned numWorkUnits()
    {
        Owned<IRemoteConnection> conn = sdsManager->connect("/WorkUnits", session, 0, SDS_LOCK_TIMEOUT);
        if (!conn) 
            return 0;
        IPropertyTree *root = conn->queryRoot();
        return root->numChildren();
    }

    virtual unsigned numWorkUnitsFiltered(WUSortField *filters,
                                        const void *filterbuf,
                                        ISecManager *secmgr, 
                                        ISecUser *secuser)
    {
        Owned<IConstWorkUnitIterator> iter =  getWorkUnitsSorted( NULL,filters,filterbuf,0,0x7fffffff,NULL,NULL,secmgr,secuser);
        // this is rather slow but necessarily so (for security check)
        unsigned ret = 0;
        ForEach(*iter)
            ret++;
        return ret;
    }

    virtual unsigned numWorkUnitsFiltered(WUSortField *filters,const void *filterbuf)
    {
        if (!filters)
            return numWorkUnits();
        return numWorkUnitsFiltered(filters,filterbuf,NULL,NULL);
    }

    void asyncRemoveDll(const char * name, bool removeDlls, bool removeDirectory)
    {
        deletedllworkq->post(new asyncRemoveDllWorkItem(name,removeDlls,removeDirectory));
    }

    ISDSManager *sdsManager;
    SessionId session;
    ISecManager *secMgr;

private:
    void deleteChildren(IPropertyTree *root, const char *wuid)
    {
        StringBuffer kids("*[@parent=\"");
        kids.append(wuid).append("\"]");
        Owned<IPropertyTreeIterator> it = root->getElements(kids.str());
        ForEach (*it)
        {
            deleteChildren(root, it->query().queryName());
        }
        root->removeProp(wuid);
    }
    class CConstWUIterator : public CInterface, implements IConstWorkUnitIterator
    {
        IArrayOf<IConstWorkUnit> w;
        CArrayIteratorOf<IConstWorkUnit,IConstWorkUnitIterator> it;
    public:
        IMPLEMENT_IINTERFACE;
        CConstWUIterator() : it(w)
        {
        }
        CConstWUIterator(IRemoteConnection *conn, IPropertyTree *, IPropertyTreeIterator *_it, ISecManager *secmgr=NULL, ISecUser *secuser=NULL) : it(w)
        {
            UniqueScopes us;
            Owned<ISecResourceList> scopes;
            if (secmgr /* && secmgr->authTypeRequired(RT_WORKUNIT_SCOPE) tbd */)
            {
                scopes.setown(secmgr->createResourceList("wuscopes"));
                for (_it->first(); _it->isValid(); _it->next())
                {
                    const char *scopename = _it->query().queryProp("@scope");
                    if (scopename && *scopename && !us.getValue(scopename))
                    {
                        scopes->addResource(scopename);
                        us.setValue(scopename, true);
                    }
                }
                if (scopes->count())
                {
                    secmgr->authorizeEx(RT_WORKUNIT_SCOPE, *secuser, scopes);
                    if (checkWuScopeListSecAccess(NULL, scopes, SecAccess_Read, "iterating", false, false))
                        scopes.clear(); //if no scopes restricted, no need to check later
                }
                else
                    scopes.clear();
            }
            for (_it->first(); _it->isValid(); _it->next())
            {
                IPropertyTree *rp = &_it->query();
                const char *scopename=rp->queryProp("@scope");
                if (!scopename || !*scopename || !scopes || checkWuScopeListSecAccess(rp->queryProp("@scope"), scopes, SecAccess_Read, "iterating", false, false))
                    w.append(*(IConstWorkUnit *) new CLocalWorkUnit(LINK(conn), LINK(rp), secmgr, secuser));
            }
        }
        bool first() { return it.first(); }
        bool isValid() { return it.isValid(); }
        bool next() { return it.next(); }
        IConstWorkUnit & query() { return it.query();}
    };
    IRemoteConnection* connect(const char *xpath, unsigned flags)
    {
        return sdsManager->connect(xpath, session, flags, SDS_LOCK_TIMEOUT);
    }

};

static Owned<CWorkUnitFactory> factory;

void CWorkUnitFactory::clientShutdown()
{
    factory.clear();
}

void clientShutdownWorkUnit()
{
    factory.clear();
}

extern WORKUNIT_API IWorkUnitFactory * getWorkUnitFactory()
{
    if (!factory)
        factory.setown(new CWorkUnitFactory());
    return factory.getLink();
}

class CSecureWorkUnitFactory : public CInterface, implements IWorkUnitFactory
{
public:
    IMPLEMENT_IINTERFACE;

    CSecureWorkUnitFactory(ISecManager &secmgr, ISecUser &secuser)
    {
        if (!factory)
            factory.setown(new CWorkUnitFactory());
        secMgr.set(&secmgr);
        secUser.set(&secuser);
    }
    virtual IWorkUnit* createNamedWorkUnit(const char *wuid,const char *parentWuid, const char *app, const char *user)
    {
        checkWuScopeSecAccess(user, *secMgr.get(), secUser.get(), SecAccess_Write, "Create", true, true);
        IWorkUnit *wu=factory->createNamedWorkUnit(wuid, parentWuid, app, user);
        if (wu)
        {
            CLockedWorkUnit* lw = dynamic_cast<CLockedWorkUnit*>(wu);
            if (lw)
                lw->setSecIfcs(secMgr.get(), secUser.get());
        }
        return wu;
    }
    virtual IWorkUnit* createWorkUnit(const char *parentWuid, const char *app, const char *user)
    {
        checkWuScopeSecAccess(user, *secMgr.get(), secUser.get(), SecAccess_Write, "Create", true, true);
        IWorkUnit *wu=factory->createWorkUnit(parentWuid, app, user);
        if (wu)
        {
            CLockedWorkUnit* lw = dynamic_cast<CLockedWorkUnit*>(wu);
            if (lw)
                lw->setSecIfcs(secMgr.get(), secUser.get());
        }
        return wu;
    }
    virtual bool deleteWorkUnitEx(const char * wuid)
    {
        return factory->secDeleteWorkUnit(wuid, secMgr.get(), secUser.get(), true);
    }
    virtual bool deleteWorkUnit(const char * wuid)
    {
        return factory->secDeleteWorkUnit(wuid, secMgr.get(), secUser.get(), false);
    }
    virtual IConstWorkUnit* openWorkUnit(const char *wuid, bool lock)
    {
        return factory->secOpenWorkUnit(wuid, lock, secMgr.get(), secUser.get());
    }
    virtual IWorkUnit* updateWorkUnit(const char *wuid)
    {
        return factory->secUpdateWorkUnit(wuid, secMgr.get(), secUser.get());
    }

    //make cached workunits a non secure pass through for now.
    virtual IConstWorkUnitIterator * getWorkUnitsByOwner(const char * owner)
    {
        // Not sure what to do about customerID vs user etc
        StringBuffer path("*");
        if (owner && *owner)
            path.append("[@submitID=\"").append(owner).append("\"]");
        return factory->getWorkUnitsByXPath(path.str(), secMgr.get(), secUser.get());
    }
    virtual IConstWorkUnitIterator * getWorkUnitsByState(WUState state);
    virtual IConstWorkUnitIterator * getWorkUnitsByECL(const char* ecl)
    {   
        return factory->getWorkUnitsByECL(ecl);
    }

    virtual IConstWorkUnitIterator * getWorkUnitsByCluster(const char* cluster)
    {   
        return factory->getWorkUnitsByCluster(cluster);
    }

    virtual IConstWorkUnitIterator * getWorkUnitsByXPath(const char * xpath)
    {
        return factory->getWorkUnitsByXPath(xpath, secMgr.get(), secUser.get());
    }

    virtual void descheduleAllWorkUnits()
    {
        factory->descheduleAllWorkUnits();
    }

    virtual IConstWorkUnitIterator * getChildWorkUnits(const char *parent)
    {
        StringBuffer path("*[@parent=\"");
        path.append(parent).append("\"]");
        return factory->getWorkUnitsByXPath(path.str(), secMgr.get(), secUser.get());
    }
    virtual int setTracingLevel(int newLevel)
    {
        return factory->setTracingLevel(newLevel);
    }

    virtual IConstWorkUnitIterator* getWorkUnitsSorted( WUSortField *sortorder, // list of fields to sort by (terminated by WUSFterm)
                                                        WUSortField *filters,   // NULL or list of fields to filter on (terminated by WUSFterm)
                                                        const void *filterbuf,  // (appended) string values for filters
                                                        unsigned startoffset,
                                                        unsigned maxnum,
                                                        const char *queryowner, 
                                                        __int64 *cachehint)
    {
        return factory->getWorkUnitsSorted(sortorder,filters,filterbuf,startoffset,maxnum,queryowner,cachehint, secMgr.get(), secUser.get());
    }

    virtual unsigned numWorkUnits()
    {
        return factory->numWorkUnits();
    }

    virtual unsigned numWorkUnitsFiltered(WUSortField *filters,
                                        const void *filterbuf)
    {
        return factory->numWorkUnitsFiltered(filters,filterbuf,secMgr.get(), secUser.get());
    }


private:
    Owned<CWorkUnitFactory> base_factory;
    Owned<ISecManager> secMgr;
    Owned<ISecUser> secUser;
};

extern WORKUNIT_API IWorkUnitFactory * getSecWorkUnitFactory(ISecManager &secmgr, ISecUser &secuser)
{
    return new CSecureWorkUnitFactory(secmgr, secuser);
}

extern WORKUNIT_API IWorkUnitFactory * getWorkUnitFactory(ISecManager *secmgr, ISecUser *secuser)
{
    if (secmgr && secuser)
        return getSecWorkUnitFactory(*secmgr, *secuser);
    else
        return getWorkUnitFactory();
}

//==========================================================================================

class CStringPTreeIterator : public CInterface, implements IStringIterator
{
    Owned<IPropertyTreeIterator> it;
public:
    IMPLEMENT_IINTERFACE;
    CStringPTreeIterator(IPropertyTreeIterator *p) : it(p) {};
    virtual bool first() { return it->first(); }
    virtual bool next() { return it->next(); }
    virtual bool isValid() { return it->isValid(); }
    virtual IStringVal & str(IStringVal &s) { s.set(it->query().queryProp(NULL)); return s; }
};

class CStringPTreeTagIterator : public CInterface, implements IStringIterator
{
    Owned<IPropertyTreeIterator> it;
public:
    IMPLEMENT_IINTERFACE;
    CStringPTreeTagIterator(IPropertyTreeIterator *p) : it(p) {};
    virtual bool first() { return it->first(); }
    virtual bool next() { return it->next(); }
    virtual bool isValid() { return it->isValid(); }
    virtual IStringVal & str(IStringVal &s) { s.set(it->query().queryName()); return s; }
};

class CStringPTreeAttrIterator : public CInterface, implements IStringIterator
{
    Owned<IPropertyTreeIterator> it;
    StringAttr name;
public:
    IMPLEMENT_IINTERFACE;
    CStringPTreeAttrIterator(IPropertyTreeIterator *p, const char *_name) : it(p), name(_name) {};
    virtual bool first() { return it->first(); }
    virtual bool next() { return it->next(); }
    virtual bool isValid() { return it->isValid(); }
    virtual IStringVal & str(IStringVal &s) { s.set(it->query().queryProp(name)); return s; }
};
//==========================================================================================

CLocalWorkUnit::CLocalWorkUnit(IRemoteConnection *_conn, ISecManager *secmgr, ISecUser *secuser, const char *parentWuid) : connection(_conn)
{
    connectAtRoot = true;
    init();
    p.setown(connection->getRoot());
    if (parentWuid)
        p->setProp("@parent", parentWuid);
    secMgr.set(secmgr);
    secUser.set(secuser);
}

CLocalWorkUnit::CLocalWorkUnit(IRemoteConnection *_conn, IPropertyTree* root, ISecManager *secmgr, ISecUser *secuser) : connection(_conn)
{
    connectAtRoot = false;
    init();
    p.setown(root);
    secMgr.set(secmgr);
    secUser.set(secuser);
}

void CLocalWorkUnit::init()
{
    p.clear();
    cachedGraphs.clear();
    workflowIterator.clear();
    query.clear();
    graphs.kill();
    results.kill();
    variables.kill();
    plugins.kill();
    libraries.kill();
    activities.kill();
    exceptions.kill();
    temporaries.kill();
    roxieQueryInfo.clear();
    webServicesInfo.clear();
    workflowIteratorCached = false;
    resultsCached = false;
    temporariesCached = false;
    variablesCached = false;
    exceptionsCached = false;
    pluginsCached = false;
    librariesCached = false;
    activitiesCached = false;
    webServicesInfoCached = false;
    roxieQueryInfoCached = false;
    dirty = false;
    abortDirty = true;
    abortState = false;
}

// Dummy workunit support
CLocalWorkUnit::CLocalWorkUnit(const char *_wuid, const char *parentWuid, ISecManager *secmgr, ISecUser *secuser)
{
    connectAtRoot = true;
    init();
    p.setown(createPTree(_wuid));
    p->setProp("@xmlns:xsi", "http://www.w3.org/1999/XMLSchema-instance");
    if (parentWuid)
        p->setProp("@parentWuid", parentWuid);
    secMgr.set(secmgr);
    secUser.set(secuser);
}

CLocalWorkUnit::~CLocalWorkUnit() 
{
    if (workUnitTraceLevel > 1)
    {
        PrintLog("Releasing workunit %s mode %x", p->queryName(), connection ? connection->queryMode() :0);
    }
    try
    {
        unsubscribe();
        query.clear();
        webServicesInfo.clear();
        roxieQueryInfo.clear();
        workflowIterator.clear();

        activities.kill();
        plugins.kill();
        libraries.kill();
        exceptions.kill();
        graphs.kill();
        results.kill();
        temporaries.kill();
        variables.kill();
        timestamps.kill();
        appvalues.kill();

        userDesc.clear();
        secMgr.clear();
        secUser.clear();
        cachedGraphs.clear();
        p.clear();
        connection.clear();
    }
    catch (IException *E) { LOG(MCexception(E, MSGCLS_warning), E, "Exception during ~CLocalWorkUnit"); E->Release(); }
}

void CLocalWorkUnit::cleanupAndDelete(bool deldll,bool deleteOwned)
{
    TIME_SECTION("WUDELETE cleanupAndDelete total");
    // Delete any related things in SDS etc that might otherwise be forgotten
    assertex(connectAtRoot); // make sure we don't delete entire workunit tree!
    if (p->getPropBool("@protected", false))
        throw MakeStringException(WUERR_WorkunitProtected, "%s: Workunit is protected",p->queryName());
    switch (getState())
    {
    case WUStateAborted:
    case WUStateCompleted:
    case WUStateFailed:
    case WUStateArchived:
        break;
    case WUStateCompiled:
        if (getAction()==WUActionRun || getAction()==WUActionUnknown)
            throw MakeStringException(WUERR_WorkunitActive, "%s: Workunit is active",p->queryName());
        break;
    case WUStateWait:
        throw MakeStringException(WUERR_WorkunitScheduled, "%s: Workunit is scheduled, not deleting",p->queryName());
    default:
        throw MakeStringException(WUERR_WorkunitActive, "%s: Workunit is active",p->queryName());
        break;
    }
    try
    {
        //Move any service aliases
        if (getIsQueryService())
        {
            Owned<IPropertyTree> registry = getQueryRegistry(p->queryProp("@clusterName"), false);
            if (registry)
                removeWuidFromNamedQueries(registry, p->queryName());
        }


        if (deldll && !p->getPropBool("@isClone", false))
        {
            Owned<IConstWUQuery> q = getQuery();
            if (q)
            {
                Owned<IConstWUAssociatedFileIterator> iter = &q->getAssociatedFiles();
                SCMStringBuffer name;
                ForEach(*iter)
                {
                    IConstWUAssociatedFile & cur = iter->query();
                    cur.getName(name);
                    bool removeDir = (cur.getType() == FileTypeDll);        // this is to keep the code the same as before, but I don't know why it only does it for the dll.
                    factory->asyncRemoveDll(name.str(), true, removeDir);
                }
            }
        }
        StringBuffer apath;
//      PROGLOG("wuid dll files removed");
        {
            apath.append("/WorkUnitAborts/").append(p->queryName());
            Owned<IRemoteConnection> acon = factory->sdsManager->connect(apath.str(), factory->session, RTM_LOCK_WRITE | RTM_DELETE_ON_DISCONNECT, SDS_LOCK_TIMEOUT);
            acon.clear();
        }
//      PROGLOG("wuid WorkUnitAborts entry removed");

        deleteTempFiles(NULL, deleteOwned, true); // all, any remaining.
    }
    catch(IException *E)
    {
        StringBuffer s;
        LOG(MCexception(E, MSGCLS_warning), E, s.append("Exception during cleanupAndDelete: ").append(p->queryName()).str());
        E->Release();
    }
    catch (...) 
    { 
        WARNLOG("Unknown exception during cleanupAndDelete: %s", p->queryName()); 
    }
    CConstGraphProgress::deleteWuidProgress(p->queryName());
    connection->close(true);  
    PROGLOG("WUID %s removed",p->queryName());
    connection.clear();
}

void CLocalWorkUnit::setTimeScheduled(const IJlibDateTime &val)
{
    SCMStringBuffer strval;
    val.getGmtString(strval);
    p->setProp("@timescheduled",strval.str());
}

IJlibDateTime & CLocalWorkUnit::getTimeScheduled(IJlibDateTime &val) const
{
    StringBuffer str;
    p->getProp("@timescheduled",str);
    if(str.length())
        val.setGmtString(str.str());
    return val; 
}

bool modifyAndWriteWorkUnitXML(char const * wuid, StringBuffer & buf, StringBuffer & extra, IFileIO * fileio)
{
    // kludge in extra chunks of XML such as GraphProgress and GeneratedDlls
    if(extra.length())
    {
        size32_t l = (size32_t)strlen(wuid);
        size32_t p = buf.length()-l-4; // bit of a kludge
        assertex(memcmp(buf.str()+p+2,wuid,l)==0);
        StringAttr tail(buf.str()+p);
        buf.setLength(p);
        buf.append(extra);
        buf.append(tail);
    }
    return (fileio->write(0,buf.length(),buf.str()) == buf.length());
}

bool CLocalWorkUnit::archiveWorkUnit(const char *base,bool del,bool ignoredllerrors,bool deleteOwned)
{
    CriticalBlock block(crit);
    StringBuffer path(base);
    if (!p)
        return false;
    const char *wuid = p->queryName();
    if (!wuid||!*wuid)
        return false;
    addPathSepChar(path).append(wuid).append(".xml");
    Owned<IFile> file = createIFile(path.str());
    if (!file)
        return false;
    Owned<IFileIO> fileio = file->open(IFOcreate);
    if (!fileio)
        return false;

    StringBuffer buf;
    exportWorkUnitToXML(this, buf);

    StringBuffer extraWorkUnitXML;
    StringBuffer xpath("/GraphProgress/");
    xpath.append(wuid);
    Owned<IRemoteConnection> conn = querySDS().connect(xpath.str(), myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
    if (conn) {
        Owned<IPropertyTree> tmp = createPTree("GraphProgress");
        mergePTree(tmp,conn->queryRoot());
        toXML(tmp,extraWorkUnitXML,1,XML_Format);
        conn->close();
    }

    Owned<IConstWUQuery> q = getQuery();
    if (!q) {
        if(!modifyAndWriteWorkUnitXML(wuid, buf, extraWorkUnitXML, fileio))
           return false;
        if (del) {
            if (getState()==WUStateUnknown)
                setState(WUStateArchived);  // to allow delete
            cleanupAndDelete(false,deleteOwned);    // no query, may as well delete 
        }
        return false;   
    }

    Owned<IConstWUAssociatedFileIterator> iter = &q->getAssociatedFiles();
    SCMStringBuffer name;
    Owned<IException> exception;
    Owned<IDllLocation> loc;
    StringBuffer dst, locpath;
    Owned<IPropertyTree> generatedDlls = createPTree("GeneratedDlls");
    ForEach(*iter) {
        IConstWUAssociatedFile & cur = iter->query();
        cur.getName(name);
        if (name.length()) {
            Owned<IDllEntry> entry = queryDllServer().getEntry(name.str());
            if (entry.get()) {
                Owned<IPropertyTree> generatedDllBranch = createPTree();
                generatedDllBranch->setProp("@name", entry->queryName());
                generatedDllBranch->setProp("@kind", entry->queryKind());
                bool removeDllFiles = true;
                exception.clear();
                try
                {
                    loc.setown(entry->getBestLocation()); //throws exception if no readable locations
                }
                catch(IException * e)
                {
                    exception.setown(e);
                    loc.setown(entry->getBestLocationCandidate()); //this will be closest of the unreadable locations
                }
                RemoteFilename filename;
                loc->getDllFilename(filename);
                if(!exception)
                {
                    Owned<IFile> srcfile = createIFile(filename);
                    addPathSepChar(dst.clear().append(base));
                    filename.getTail(dst);
                    Owned<IFile> dstfile = createIFile(dst.str());
                    try
                    {
                        copyFile(dstfile,srcfile);
                        makeAbsolutePath(dstfile->queryFilename(), locpath.clear());
                    }
                    catch(IException * e)
                    {
                        exception.setown(e);
                    }
                }
                if(exception)
                {
                    if(ignoredllerrors)
                    {
                        EXCLOG(exception.get(), "archiveWorkUnit (copying associated file)");
                        //copy failed, so store original (best) location and don't delete the files
                        filename.getRemotePath(locpath.clear());
                        removeDllFiles = false;
                    }
                    else
                    {
                        throw exception.getLink();
                    }
                }
                generatedDllBranch->setProp("@location", locpath.str());
                generatedDlls->addPropTree("GeneratedDll", generatedDllBranch.getClear());
                if (del) {
                    bool removeDir = (cur.getType() == FileTypeDll); // copied from cleanupAndDelete code, above
                    if (!p->getPropBool("@isClone", false))         // Leak to protect against cloned WUs
                        entry->remove(removeDllFiles, removeDir);
                }
            }
        }
    }
    iter.clear();
    if(generatedDlls->numChildren())
        toXML(generatedDlls, extraWorkUnitXML, 1, XML_Format);

    if(!modifyAndWriteWorkUnitXML(wuid, buf, extraWorkUnitXML, fileio))
       return false;

    if (del) {
        //setState(WUStateArchived);    // this isn't useful as about to delete it!
        q.clear();
        //deldll false as should have deleted all those we successfully copied, and archived and removed SDS entries, above
        cleanupAndDelete(false, deleteOwned);
    }

    return true;
}

void CLocalWorkUnit::packWorkUnit(bool pack)
{
    // only packs Graph info currently
    CriticalBlock block(crit);
    if (!p)
        return;
    const char *wuid = p->queryName();
    if (!wuid||!*wuid)
        return;
    if (pack) {
        if (!p->hasProp("PackedGraphs")) {
            cachedGraphs.clear();
            IPropertyTree *t = p->queryPropTree("Graphs");
            if (t) {
                MemoryBuffer buf;
                t->serialize(buf);
                p->setPropBin("PackedGraphs",buf.length(),buf.bufferBase());
                p->removeTree(t);
            }
        }
    }
    else {
        ensureGraphsUnpacked();
    }
    CConstGraphProgress::packProgress(wuid,pack);
}

IPropertyTree * pruneBranch(IPropertyTree * from, char const * xpath)
{
    Owned<IPropertyTree> ret;
    IPropertyTree * branch = from->queryPropTree(xpath);
    if(branch) {
        ret.setown(createPTreeFromIPT(branch));
        from->removeTree(branch);
    }
    return ret.getClear();
}

bool restoreWorkUnit(const char *base,const char *wuid)
{
    StringBuffer path(base);
    if (!wuid||!*wuid)
        return false;
    addPathSepChar(path).append(wuid).append(".xml");
    Owned<IFile> file = createIFile(path.str());
    if (!file)
        return false;
    Owned<IFileIO> fileio = file->open(IFOread);
    if (!fileio)
        return false;
    Owned<IPropertyTree> pt = createPTree(*fileio);
    if (!pt)
        return false;
    CDateTime dt;
    dt.setNow();
    StringBuffer dts;
    dt.getString(dts);
    pt->setProp("@restoredDate", dts.str());
    Owned<IRemoteConnection> conn = querySDS().connect("/WorkUnits", myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
    if (!conn) {
        ERRLOG("restoreWorkUnit could not connect to /WorkUnits");
        return false;
    }
    IPropertyTree *root = conn->queryRoot();
    if (root->hasProp(wuid)) {
        ERRLOG("restoreWorkUnit WUID %s already exists",wuid);
        return false;
    }
    Owned<IPropertyTree> gprogress = pruneBranch(pt, "GraphProgress[1]");
    Owned<IPropertyTree> generatedDlls = pruneBranch(pt, "GeneratedDlls[1]");
    root->setPropTree(wuid,pt.getClear());
    conn.clear();

    // now kludge back GraphProgress and GeneratedDlls
    if (gprogress) {
        StringBuffer xpath("/GraphProgress/");
        conn.setown(querySDS().connect("/GraphProgress", myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT));
        if (conn) {
            IPropertyTree *groot = conn->queryRoot();
            if (groot->hasProp(wuid)) {
                ERRLOG("restoreWorkUnit WUID %s graphprogress already exists, removing",wuid);
                groot->removeProp(wuid);
            }
            groot->setPropTree(wuid,gprogress.getClear());
        }
    }

    if(generatedDlls)
    {
        Owned<IPropertyTreeIterator> dlls = generatedDlls->getElements("GeneratedDll");
        for(dlls->first(); dlls->isValid(); dlls->next())
        {
            IPropertyTree & dll = dlls->query();
            char const * name = dll.queryProp("@name");
            char const * kind = dll.queryProp("@kind");
            char const * location = dll.queryProp("@location");
            Owned<IDllEntry> got = queryDllServer().getEntry(name);
            if(!got)
                queryDllServer().registerDll(name, kind, location);
        }
    }

    return true;
}

void CLocalWorkUnit::loadXML(const char *xml)
{
    CriticalBlock block(crit);
    init();
    assertex(xml);
    p.setown(createPTreeFromXMLString(xml));
}

void CLocalWorkUnit::serialize(MemoryBuffer &tgt)
{
    CriticalBlock block(crit);
    StringBuffer x;
    tgt.append(exportWorkUnitToXML(this, x).str());
}

void CLocalWorkUnit::deserialize(MemoryBuffer &src)
{
    CriticalBlock block(crit);
    StringAttr value;
    src.read(value);
    loadXML(value);
}

void CLocalWorkUnit::notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen, const void *valueData)
{
    dirty = true;
}

void CLocalWorkUnit::abort()
{
    abortDirty = true;
}

void CLocalWorkUnit::requestAbort()
{
    CriticalBlock block(crit);
    abortWorkUnit(p->queryName());
}

void CLocalWorkUnit::subscribe(WUSubscribeOptions options)
{
    CriticalBlock block(crit);
    bool subscribeAbort = false;
    bool subscribeChange = false;
    bool needChildren = true;
    switch (options)
    {
    case SubscribeOptionAbort:
        subscribeAbort = true;
        break;
    case SubscribeOptionRunningState:
        needChildren = false;
    case SubscribeOptionAnyState:
        subscribeAbort = true;
        subscribeChange = true;
        break;
    case SubscribeOptionProgress:
    case SubscribeOptionAll:
        subscribeChange = true;
        break;
    }
    if (subscribeChange)
    {
        if (changeWatcher && changeWatcher->watchingChildren() != needChildren)
        {
            changeWatcher->unsubscribe();
            changeWatcher.clear();
        }
        if (!changeWatcher)
        {
            changeWatcher.setown(new CWorkUnitWatcher(this, p->queryName(), needChildren));
            dirty = true;
        }
    }
    if (subscribeAbort && !abortWatcher)
    {
        abortWatcher.setown(new CWorkUnitAbortWatcher(this, p->queryName()));
        abortDirty = true;
    }
}

#if 0 // I don't think this is used (I grepped the source), am leaving here just in case I've missed somewhere (PG)
WUState CLocalWorkUnit::waitComplete(int timeout, bool returnOnWaitState)
{
    class WorkUnitWaiter : public CInterface, implements ISDSSubscription, implements IAbortHandler
    {
        Semaphore changed;
        CLocalWorkUnit *parent;
    public:
        IMPLEMENT_IINTERFACE;

        WorkUnitWaiter(CLocalWorkUnit *_parent) : parent(_parent) { aborted = false; };

        void notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen, const void *valueData)
        {
            parent->notify(id, xpath, flags, valueLen, valueData);
            changed.signal();
        }
        bool wait(unsigned timeout)
        {
            return changed.wait(timeout) && !aborted;
        }
        bool onAbort()
        {
            aborted = true;
            changed.signal();
            return false;
        }
        bool aborted;

    } waiter(this);
    Owned<CWorkUnitWatcher> w = new CWorkUnitWatcher(&waiter, p->queryName(), false);
    LocalIAbortHandler abortHandler(waiter);
    forceReload(); // or may miss changes that already happened, between load of wu and now.
    unsigned start = msTick();
    WUState ret;
    loop
    {
        ret = getState();
        switch (ret)
        {
        case WUStateWait:
            if(!returnOnWaitState)
                break;
            //fall thru
        case WUStateCompleted:
        case WUStateFailed:
        case WUStateAborted:
            w->unsubscribe();
            return ret;
        }
        unsigned waited = msTick() - start;
        if (timeout==-1)
        {
            waiter.wait(20000);
            if (waiter.aborted)
            {
                ret = WUStateUnknown;  // MORE - throw an exception?
                break;
            }
        }
        else if (waited > timeout || !waiter.wait(timeout-waited))
        {
            ret = WUStateUnknown;  // MORE - throw an exception?
            break;
        }
        reload();
    }
    w->unsubscribe();
    return ret;
}
#endif

void CLocalWorkUnit::forceReload()
{
    dirty = true;
    reload();
}

bool CLocalWorkUnit::reload()
{
    CriticalBlock block(crit);
    if (dirty)
    {
        if (!connectAtRoot)
        {
            StringBuffer wuRoot;
            getXPath(wuRoot, p->queryName());
            IRemoteConnection *newconn = factory->sdsManager->connect(wuRoot.str(), factory->session, 0, SDS_LOCK_TIMEOUT);
            if (!newconn)
                throw MakeStringException(WUERR_ConnectFailed, "Could not connect to workunit %s (deleted?)",p->queryName());
            connection.setown(newconn);
            connectAtRoot = true;
        }
        else
            connection->reload();
        init();
        p.setown(connection->getRoot());
        return true;
    }
    return false;
}

void CLocalWorkUnit::unsubscribe()
{
    CriticalBlock block(crit);
    if (abortWatcher)
    {
        abortWatcher->unsubscribe();
        abortWatcher.clear();
    }
    if (changeWatcher)
    {
        changeWatcher->unsubscribe();
        changeWatcher.clear();
    }
}

void CLocalWorkUnit::unlockRemote(bool commit)
{
    CriticalBlock block(crit);
    MTIME_SECTION(timer, "WorkUnit_unlockRemote");
    locked.unlock();
    if (commit)  
    {
        try
        {
            assertex(connectAtRoot);
            setTimeStamp("workunit", NULL, "Modified",false);
            try { connection->commit(); }
            catch (IException *e)
            { 
                EXCLOG(e, "Error during workunit commit");
                connection->rollback();
                connection->changeMode(0, SDS_LOCK_TIMEOUT);
                throw;
            }
            connection->changeMode(0, SDS_LOCK_TIMEOUT);
        }
        catch (IException *E)
        {
            StringBuffer s;
            PrintLog("Failed to release write lock on workunit: %s", E->errorMessage(s).str());
            throw;
        }
    }
}

IWorkUnit &CLocalWorkUnit::lockRemote(bool commit)
{
    if (secMgr)
        checkWuSecAccess(*this, *secMgr.get(), secUser.get(), SecAccess_Write, "write lock", true, true);
    locked.lock();
    CriticalBlock block(crit);
    MTIME_SECTION(timer, "WorkUnit_lockRemote");
    if (commit)
    {
        try
        {
            StringBuffer wuRoot;
            getXPath(wuRoot, p->queryName());
            if (connection&&connectAtRoot) 
                connection->changeMode(RTM_LOCK_WRITE,SDS_LOCK_TIMEOUT);
            else 
                connection.setown(factory->sdsManager->connect(wuRoot.str(), factory->session, RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT));
            if (!connection)
                throw MakeStringException(WUERR_LockFailed, "Failed to get connection for xpath %s", wuRoot.str());
            connectAtRoot = true;
            init();
            p.setown(connection->getRoot());
        }
        catch (IException *E)
        {
            StringBuffer s;
            PrintLog("Failed to get write lock on workunit: %s", E->errorMessage(s).str());
            locked.unlock();
            throw;
        }
    }
    return *new CLockedWorkUnit(LINK(this));
}

void CLocalWorkUnit::commit()
{
    CriticalBlock block(crit);
    assertex(connectAtRoot);
    if (connection)
        connection->commit();
}

IWorkUnit& CLocalWorkUnit::lock()
{
    return lockRemote(true);
}

IStringVal& CLocalWorkUnit::getWuid(IStringVal &str) const
{
    CriticalBlock block(crit);
    str.set(p->queryName());
    return str;
}

unsigned CLocalWorkUnit::getDebugAgentListenerPort() const
{
    CriticalBlock block(crit);
    return p->getPropInt("@DebugListenerPort", 0);
}

void CLocalWorkUnit::setDebugAgentListenerPort(unsigned port)
{
    CriticalBlock block(crit);
    p->setPropInt("@DebugListenerPort", port);
}

IStringVal& CLocalWorkUnit::getDebugAgentListenerIP(IStringVal &ip) const
{
    CriticalBlock block(crit);
    ip.set(p->queryProp("@DebugListenerIP"));
    return ip;
}

void CLocalWorkUnit::setDebugAgentListenerIP(const char * ip)
{
    CriticalBlock block(crit);
    p->setProp("@DebugListenerIP", ip);
}

IStringVal& CLocalWorkUnit::getSecurityToken(IStringVal &str) const
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@token"));
    return str;
}

void CLocalWorkUnit::setSecurityToken(const char *value)
{
    CriticalBlock block(crit);
    p->setProp("@token", value);
}

bool CLocalWorkUnit::getRunningGraph(IStringVal &graphName, WUGraphIDType &subId) const
{
    return CConstGraphProgress::getRunningGraph(p->queryName(), graphName, subId);
}

void CLocalWorkUnit::setJobName(const char *value)
{
    CriticalBlock block(crit);
    p->setProp("@jobName", value);
}

IStringVal& CLocalWorkUnit::getJobName(IStringVal &str) const
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@jobName"));
    return str;
}

void CLocalWorkUnit::setClusterName(const char *value)
{
    CriticalBlock block(crit);
    p->setProp("@clusterName", value);
}

IStringVal& CLocalWorkUnit::getClusterName(IStringVal &str) const
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@clusterName"));
    return str;
}

void CLocalWorkUnit::setAllowedClusters(const char *value)
{
    setDebugValue("allowedclusters",value, true);
}

IStringVal& CLocalWorkUnit::getAllowedClusters(IStringVal &str) const
{
    CriticalBlock block(crit);
    getDebugValue("allowedclusters",str);
    if (str.length()!=0)
        return str;
    str.set(p->queryProp("@clusterName"));
    return str;
}

void CLocalWorkUnit::setAllowAutoQueueSwitch(bool val)
{ 
    setDebugValueInt("allowautoqueueswitch",val?1:0,true);
}
    
bool CLocalWorkUnit::getAllowAutoQueueSwitch() const
{ 
    CriticalBlock block(crit);
    return getDebugValueBool("allowautoqueueswitch",false);
}


void CLocalWorkUnit::setLibraryInformation(const char * name, unsigned interfaceHash, unsigned definitionHash)
{
    StringBuffer suffix;

    if (name && *name)
        setApplicationValue("LibraryModule", "name", name, true);
    setApplicationValueInt("LibraryModule", "interfaceHash", interfaceHash, true);
    setApplicationValueInt("LibraryModule", "definitionHash", definitionHash, true);
    setApplicationValue("LibraryModule", "platform", appendLibrarySuffix(suffix).str(), true);
}

void CLocalWorkUnit::remoteCheckAccess(IUserDescriptor *user, bool writeaccess) const
{
    unsigned auditflags = DALI_LDAP_AUDIT_REPORT|DALI_LDAP_READ_WANTED;
    if (writeaccess)
        auditflags |= DALI_LDAP_WRITE_WANTED;
    int perm = 255;
    const char *scopename = p->queryProp("@scope");
    if (scopename&&*scopename) {
        if (!user)
            user = queryUserDescriptor();
        perm = querySessionManager().getPermissionsLDAP("workunit",scopename,user,auditflags);
        if (perm<0) {
            if (perm==-1) 
                perm = 255;
            else 
                perm = 0;
        }
    }
    if (!HASREADPERMISSION(perm)) {
        SCMStringBuffer wuid;
        getWuid(wuid);
        throw MakeStringException(WUERR_WorkunitAccessDenied, "Read access denied for workunit %s",wuid.s.str());
    }
    if (writeaccess&&!HASWRITEPERMISSION(perm)) {
        SCMStringBuffer wuid;
        getWuid(wuid);
        throw MakeStringException(WUERR_WorkunitAccessDenied, "Write access denied for workunit %s",wuid.s.str());
    }
}


IStringVal& CLocalWorkUnit::getParentWuid(IStringVal &str) const 
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@parent"));
    return str;
}

void CLocalWorkUnit::setUser(const char * value) 
{ 
    CriticalBlock block(crit);
    p->setProp("@submitID", value); 
}

IStringVal& CLocalWorkUnit::getUser(IStringVal &str) const 
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@submitID"));
    return str;
}

void CLocalWorkUnit::setWuScope(const char * value) 
{ 
    CriticalBlock block(crit);
    p->setProp("@scope", value); 
}

IStringVal& CLocalWorkUnit::getWuScope(IStringVal &str) const 
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@scope"));
    return str;
}

void CLocalWorkUnit::setCustomerId(const char * value) 
{ 
    CriticalBlock block(crit);
    p->setProp("CustomerID", value); 
}

IStringVal& CLocalWorkUnit::getCustomerId(IStringVal &str) const 
{
    CriticalBlock block(crit);
    str.set(p->queryProp("CustomerID"));
    return str;
}

mapEnums priorityClasses[] = {
   { PriorityClassUnknown, "unknown" },
   { PriorityClassLow, "low" },
   { PriorityClassNormal, "normal" },
   { PriorityClassHigh, "high" },
   { PriorityClassSize, NULL },
};

void CLocalWorkUnit::setPriority(WUPriorityClass cls) 
{
    CriticalBlock block(crit);
    setEnum(p, "@priorityClass", cls, priorityClasses);
}

WUPriorityClass CLocalWorkUnit::getPriority() const 
{
    CriticalBlock block(crit);
    return (WUPriorityClass) getEnum(p, "@priorityClass", priorityClasses);
}

mapEnums states[] = {
   { WUStateUnknown, "unknown" },
   { WUStateCompiled, "compiled" },
   { WUStateRunning, "running" },
   { WUStateCompleted, "completed" },
   { WUStateFailed, "failed" },
   { WUStateArchived, "archived" },
   { WUStateAborting, "aborting" },
   { WUStateAborted, "aborted" },
   { WUStateBlocked, "blocked" },
   { WUStateSubmitted, "submitted" },
   { WUStateScheduled, "scheduled" },
   { WUStateCompiling, "compiling" },
   { WUStateWait, "wait" },
   { WUStateUploadingFiles, "uploading_files" },
   { WUStateDebugPaused, "debugging" },
   { WUStateDebugRunning, "debug_running" },
   { WUStatePaused, "paused" },
   { WUStateSize, NULL }
};

IConstWorkUnitIterator * CWorkUnitFactory::getWorkUnitsByState(WUState state)
{
    StringBuffer path("*");
    path.append("[@state=\"").append(getEnumText(state, states)).append("\"]");
    return getWorkUnitsByXPath(path.str());
}
IConstWorkUnitIterator * CSecureWorkUnitFactory::getWorkUnitsByState(WUState state)
{
    StringBuffer path("*");
    path.append("[@state=\"").append(getEnumText(state, states)).append("\"]");
    return factory->getWorkUnitsByXPath(path.str(), secMgr.get(), secUser.get());
}

void CLocalWorkUnit::setState(WUState value) 
{
    CriticalBlock block(crit);
    if (value==WUStateAborted || value==WUStatePaused || value==WUStateCompleted || value==WUStateFailed || value==WUStateSubmitted || value==WUStateWait)
    {
        if (abortWatcher)
        {
            abortWatcher->unsubscribe();
            abortWatcher.clear();
        }
        StringBuffer apath;
        apath.append("/WorkUnitAborts/").append(p->queryName());
        if(factory)
        {
            Owned<IRemoteConnection> acon = factory->sdsManager->connect(apath.str(), factory->session, RTM_LOCK_WRITE|RTM_LOCK_SUB, SDS_LOCK_TIMEOUT);
            if (acon)
                acon->close(true);
        }
    }
    setEnum(p, "@state", value, states);
    if (getDebugValueBool("monitorWorkunit", false))
    {
        switch(value)
        {
        case WUStateAborted:
            FLLOG(MCoperatorWarning, "Workunit %s aborted", p->queryName());
            break;
        case WUStateCompleted:
            FLLOG(MCoperatorProgress, "Workunit %s completed", p->queryName());
            break;
        case WUStateFailed:
            FLLOG(MCoperatorProgress, "Workunit %s failed", p->queryName());
            break;
        }
    }
    p->removeProp("@stateEx");
}

void CLocalWorkUnit::setStateEx(const char * text)
{
    CriticalBlock block(crit);
    p->setProp("@stateEx", text);
}

void CLocalWorkUnit::setAgentSession(__int64 sessionId)
{
    CriticalBlock block(crit);
    p->setPropInt64("@agentSession", sessionId);
}

void CLocalWorkUnit::setAgentPID(unsigned pid)
{
    CriticalBlock block(crit);
    p->setPropInt("@agentPID", pid);
}

bool CLocalWorkUnit::aborting() const 
{
    CriticalBlock block(crit);
    if (abortDirty)
    {
        if (factory)
        {
            StringBuffer apath;
            apath.append("/WorkUnitAborts/").append(p->queryName());
            Owned<IRemoteConnection> acon = factory->sdsManager->connect(apath.str(), factory->session, 0, SDS_LOCK_TIMEOUT);
            if (acon)
                abortState = acon->queryRoot()->getPropInt(NULL)!=0;
            else
                abortState = false;
        }
        abortDirty = false;
    }
    return abortState;
}

bool CLocalWorkUnit::getIsQueryService() const 
{
    CriticalBlock block(crit);
    return p->getPropBool("@isQueryService", false);
}

void CLocalWorkUnit::setIsQueryService(bool value) 
{
    CriticalBlock block(crit);
    p->setPropBool("@isQueryService", value);
}

void CLocalWorkUnit::checkAgentRunning(WUState & state) 
{
    if (queryDaliServerVersion().compare("2.1")<0)
        return;
    switch(state)
    {
    case WUStateRunning:
    case WUStateDebugPaused:
    case WUStateDebugRunning:
    case WUStateBlocked:
    case WUStateAborting:
    case WUStateCompiling:
    case WUStatePaused:
        {
            SessionId agent = getAgentSession();
            if((agent>0) && querySessionManager().sessionStopped(agent, 0))
            {
                forceReload();
                state = (WUState) getEnum(p, "@state", states);
                bool isecl=state==WUStateCompiling;
                if (aborting())
                    state = WUStateAborted;
                else if (state==WUStateRunning || state==WUStatePaused || state==WUStateDebugPaused || state==WUStateDebugRunning || state==WUStateBlocked || state==WUStateCompiling)
                    state = WUStateFailed;
                else
                    return;
                WARNLOG("checkAgentRunning terminated: %"I64F"d state = %d",(__int64)agent,(int)state);
                Owned<IWorkUnit> w = &lock();
                w->setState(state);
                Owned<IWUException> e = w->createException();
                WUAction action = w->getAction();
                switch (action)
                {
                    case WUActionPause:
                    case WUActionPauseNow:
                    case WUActionResume:
                        w->setAction(WUActionUnknown);
                }
                if(isecl)
                {
                    e->setExceptionCode(1001);
                    e->setExceptionMessage("EclServer terminated unexpectedly");
                }
                else
                {
                    e->setExceptionCode(1000);
                    e->setExceptionMessage("Workunit terminated unexpectedly");
                }
            }
        }
    }
}

WUState CLocalWorkUnit::getState() const 
{
    CriticalBlock block(crit);
    WUState state = (WUState) getEnum(p, "@state", states);
    switch (state)
    {
    case WUStateRunning:
    case WUStateDebugPaused:
    case WUStateDebugRunning:
    case WUStateBlocked:
    case WUStateCompiling:
        if (aborting())
            state = WUStateAborting;
        break;
    case WUStateSubmitted:
        if (aborting())
            state = WUStateAborted;
        break;
    }
    const_cast<CLocalWorkUnit *>(this)->checkAgentRunning(state); //need const_cast as will change state if agent has died
    return state;
}

IStringVal& CLocalWorkUnit::getStateEx(IStringVal & str) const 
{
    CriticalBlock block(crit);
    str.set(p->queryProp("@stateEx"));
    return str;
}

__int64 CLocalWorkUnit::getAgentSession() const
{
    CriticalBlock block(crit);
    return p->getPropInt64("@agentSession", -1);
}

unsigned CLocalWorkUnit::getAgentPID() const
{
    CriticalBlock block(crit);
    return p->getPropInt("@agentPID", -1);
}

IStringVal& CLocalWorkUnit::getStateDesc(IStringVal &str) const 
{
    // MORE - not sure about this - may prefer a separate interface
    CriticalBlock block(crit);
    try
    {
        str.set(getEnumText(getState(), states));
    }
    catch (...)
    {
        str.set("???");
    }
    return str;
}

mapEnums actions[] = {
   { WUActionUnknown, "unknown" },
   { WUActionCompile, "compile" },
   { WUActionCheck, "check" },
   { WUActionRun, "run" },
   { WUActionExecuteExisting, "execute" },
   { WUActionPause, "pause" },
   { WUActionPauseNow, "pausenow" },
   { WUActionResume, "resume" },
   { WUActionSize, NULL },
};

void CLocalWorkUnit::setAction(WUAction value) 
{
    CriticalBlock block(crit);
    setEnum(p, "Action", value, actions);
}

WUAction CLocalWorkUnit::getAction() const 
{
    CriticalBlock block(crit);
    return (WUAction) getEnum(p, "Action", actions);
}

IStringVal& CLocalWorkUnit::getActionEx(IStringVal & str) const
{
    CriticalBlock block(crit);
    str.set(p->queryProp("Action"));
    return str;
}

IStringVal& CLocalWorkUnit::getApplicationValue(const char *app, const char *propname, IStringVal &str) const
{
    CriticalBlock block(crit);
    StringBuffer prop("Application/");
    prop.append(app).append('/').append(propname);
    str.set(p->queryProp(prop.str())); 
    return str;
}

int CLocalWorkUnit::getApplicationValueInt(const char *app, const char *propname, int defVal) const
{
    CriticalBlock block(crit);
    StringBuffer prop("Application/");
    prop.append(app).append('/').append(propname);
    return p->getPropInt(prop.str(), defVal); 
}

IConstWUAppValueIterator& CLocalWorkUnit::getApplicationValues() const
{
    CriticalBlock block(crit);
    appvalues.load(p,"Application/*");
    return *new CArrayIteratorOf<IConstWUAppValue,IConstWUAppValueIterator> (appvalues, 0, (IConstWorkUnit *) this);
}



void CLocalWorkUnit::setApplicationValue(const char *app, const char *propname, const char *value, bool overwrite)
{
    CriticalBlock block(crit);
    StringBuffer prop("Application/");
    prop.append(app).append('/').append(propname);
    if (overwrite || !p->hasProp(prop.str()))
    {
        // MORE - not sure these lines should be needed....
        StringBuffer sp;
        p->setProp(sp.append("Application").str(), ""); 
        p->setProp(sp.append('/').append(app).str(), ""); 
        p->setProp(prop.str(), value); 
    }
}

void CLocalWorkUnit::setApplicationValueInt(const char *app, const char *propname, int value, bool overwrite)
{
    CriticalBlock block(crit);
    StringBuffer prop("Application/");
    prop.append(app).append('/').append(propname);
    if (overwrite || !p->hasProp(prop.str()))
    {
        // MORE - not sure these lines should be needed....
        StringBuffer sp;
        p->setProp(sp.append("Application").str(), ""); 
        p->setProp(sp.append('/').append(app).str(), ""); 
        p->setPropInt(prop.str(), value); 
    }
}

void CLocalWorkUnit::setPriorityLevel(int level) 
{
    CriticalBlock block(crit);
    p->setPropInt("PriorityFlag",  level);
}

int CLocalWorkUnit::getPriorityLevel() const 
{
    CriticalBlock block(crit);
    return p->getPropInt("PriorityFlag"); 
}

int CLocalWorkUnit::getPriorityValue() const 
{
    CriticalBlock block(crit);
    int priority = p->getPropInt("PriorityFlag"); 
    switch((WUPriorityClass) getEnum(p, "@priorityClass", priorityClasses))
    {
    case PriorityClassLow:
        priority -= 100;
        break;
    case PriorityClassHigh:
        priority += 100;
        break;
    }
    return priority;
}

void CLocalWorkUnit::setRescheduleFlag(bool value) 
{
    CriticalBlock block(crit);
    p->setPropInt("RescheduleFlag", (int) value); 
}

bool CLocalWorkUnit::getRescheduleFlag() const 
{
    CriticalBlock block(crit);
    return p->getPropInt("RescheduleFlag") != 0; 
}

class NullIStringIterator : public CInterface, extends IStringIterator
{
public:
    IMPLEMENT_IINTERFACE;
    bool first() { return false; }
    bool next()  { return false; }
    bool isValid()  { return false; }
    IStringVal & str(IStringVal & str) { return str; }

};

class CEnvironmentClusterInfo: public CInterface, implements IConstWUClusterInfo
{
    StringAttr name;
    StringAttr serverQueue;
    StringAttr agentQueue;
    StringAttr roxieProcess;
    StringAttr thorQueue;
    StringArray thorProcesses;
    StringAttr prefix;
    StringAttr platform;
    StringAttr querySetName;
    unsigned clusterWidth;
public:
    IMPLEMENT_IINTERFACE;
    CEnvironmentClusterInfo(const char *_name, const char *_prefix, const char *_querySetName, IPropertyTree *agent, IArrayOf<IPropertyTree> &thors, IPropertyTree *roxie)
        : name(_name), prefix(_prefix), querySetName(_querySetName)
    {
        StringBuffer queue;
        if (thors.ordinality())
        {
            thorQueue.set(queue.clear().append(name).append(".thor"));
            clusterWidth = 0;
            bool lcr = false;
            ForEachItemIn(i,thors) 
            {
                IPropertyTree &thor = thors.item(i);
                thorProcesses.append(thor.queryProp("@name"));
                unsigned ts = thor.getPropInt("@slaves");
                if (clusterWidth && (ts!=clusterWidth)) 
                    throw MakeStringException(WUERR_MismatchClusterSize,"CEnvironmentClusterInfo: mismatched thor sizes in cluster");
                clusterWidth = ts;
                bool islcr = thor.getPropBool("@LCR");
                if (i==0)
                    lcr = islcr;
                else if (lcr!=islcr)
                    throw MakeStringException(WUERR_MismatchThorType,"CEnvironmentClusterInfo: mismatched thor LCR in cluster");
            }
            platform.set(lcr ? "thorlcr" : "thor");
        }
        else if (roxie)
        {
            roxieProcess.set(roxie->queryProp("@name"));
            clusterWidth = roxie->getPropInt("@numChannels", 1);
            platform.set("roxie");
        }
        else 
        {
            clusterWidth = 1;
            platform.set("hthor");
        }

        if (agent)
        {
            assertex(!roxie);
            agentQueue.set(queue.clear().append(name).append(".agent"));
        }
        else if (roxie)
            agentQueue.set(queue.clear().append(name).append(".roxie"));
        // MORE - does this need to be conditional?
        serverQueue.set(queue.clear().append(name).append(".eclserver"));
    }
    IStringVal & getName(IStringVal & str) const
    {
        str.set(name.get());
        return str;
    }
    IStringVal & getScope(IStringVal & str) const
    {
        str.set(prefix.get());
        return str;
    }
    IStringVal & getAgentQueue(IStringVal & str) const
    {
        str.set(agentQueue);
        return str;
    }
    virtual IStringVal & getServerQueue(IStringVal & str) const
    {
        str.set(serverQueue);
        return str;
    }
    IStringVal & getThorQueue(IStringVal & str) const
    {
        str.set(thorQueue);
        return str;
    }
    unsigned getSize() const 
    {
        return clusterWidth;
    }
    virtual IStringVal & getPlatform(IStringVal & str) const
    {
        str.set(platform);
        return str;
    }
    IStringVal & getQuerySetName(IStringVal & str) const
    {
        str.set(querySetName.get());
        return str;
    }
    IStringVal & getRoxieProcess(IStringVal & str) const
    {
        str.set(roxieProcess.get());
        return str;
    }
    const StringArray & getThorProcesses() const
    {
        return thorProcesses;
    }

};

IStringVal &getProcessQueueNames(IStringVal &ret, const char *process, const char *type, const char *suffix)
{
    if (process)
    {
        Owned<IRemoteConnection> conn = querySDS().connect("Environment", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
        if (conn)
        {
            StringBuffer queueNames;
            StringBuffer xpath;
            xpath.appendf("%s[@process=\"%s\"]", type, process);
            Owned<IPropertyTreeIterator> targets = conn->queryRoot()->getElements("Software/Topology/Cluster");
            ForEach(*targets)
            {
                IPropertyTree &target = targets->query();
                if (target.hasProp(xpath))
                {
                    if (queueNames.length())
                        queueNames.append(',');
                    queueNames.append(target.queryProp("@name")).append(suffix);
                }
            }
            ret.set(queueNames);
        }
    }
    return ret;
}

extern WORKUNIT_API IStringVal &getEclCCServerQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "EclCCServerProcess", ".eclserver");
}

extern WORKUNIT_API IStringVal &getEclServerQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "EclServerProcess", ".eclserver"); // shares queue name with EclCCServer
}

extern WORKUNIT_API IStringVal &getEclSchedulerQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "EclCCServerProcess", ".eclscheduler"); // Shares deployment/config with EclCCServer
}

extern WORKUNIT_API IStringVal &getAgentQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "EclAgentProcess", ".agent");
}

extern WORKUNIT_API IStringVal &getRoxieQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "RoxieCluster", ".roxie");
}

extern WORKUNIT_API IStringVal &getThorQueueNames(IStringVal &ret, const char *process)
{
    return getProcessQueueNames(ret, process, "ThorCluster", ".thor");
}

extern WORKUNIT_API IStringIterator *getTargetClusters(const char *processType, const char *processName)
{
    Owned<IRemoteConnection> conn = querySDS().connect("Environment", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
    Owned<CStringArrayIterator> ret = new CStringArrayIterator;
    if (conn)
    {
        StringBuffer xpath;
        xpath.appendf("%s", processType ? processType : "*");
        if (processName)
            xpath.appendf("[@process=\"%s\"]", processName);
        Owned<IPropertyTreeIterator> targets = conn->queryRoot()->getElements("Software/Topology/Cluster");
        ForEach(*targets)
        {
            IPropertyTree &target = targets->query();
            if (target.hasProp(xpath))
            {
                ret->append(target.queryProp("@name"));
            }
        }
    }
    return ret.getClear();
}

IConstWUClusterInfo* getTargetClusterInfo(const char *clustname)
{
    if (!clustname)
        return NULL;
    Owned<IRemoteConnection> conn = querySDS().connect("Environment", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
    if (!conn)
        return NULL;
    StringBuffer xpath;

    // MORE - at the moment configenf specifies eclagent and thor queues by (in effect) placing an 'example' thor or eclagent in the topology 
    // that uses the queue that will be used.
    // We should and I hope will change that, at which point the code below gets simpler

    xpath.appendf("Software/Topology/Cluster[@name=\"%s\"]", clustname);
    Owned<IPropertyTree> cluster = conn->queryRoot()->getPropTree(xpath.str());
    if (!cluster) 
        return NULL;
    StringBuffer prefix(cluster->queryProp("@prefix"));
    prefix.toLowerCase();

    StringBuffer querySetName;
    
    IPropertyTree *agent = NULL;
    const char *agentName = cluster->queryProp("EclAgentProcess/@process");
    if (agentName) 
    {
        xpath.clear().appendf("Software/EclAgentProcess[@name=\"%s\"]", agentName);
        agent = conn->queryRoot()->queryPropTree(xpath.str());
    }
    Owned<IPropertyTreeIterator> ti = cluster->getElements("ThorCluster");
    IArrayOf<IPropertyTree> thors;
    ForEach(*ti) 
    {
        const char *thorName = ti->query().queryProp("@process");
        if (thorName) 
        {
            xpath.clear().appendf("Software/ThorCluster[@name=\"%s\"]", thorName);
            thors.append(*conn->queryRoot()->getPropTree(xpath.str()));
        }
    }
    IPropertyTree *roxie = NULL;
    const char *roxieName = cluster->queryProp("RoxieCluster/@process");
    if (roxieName) 
    {
        xpath.clear().appendf("Software/RoxieCluster[@name=\"%s\"]", roxieName);
        roxie = conn->queryRoot()->queryPropTree(xpath.str());
        querySetName.clear().append(roxieName);
    }

    if (querySetName.length() == 0)
        querySetName.append(clustname);

    return new CEnvironmentClusterInfo(clustname, prefix, querySetName, agent, thors, roxie);
}

const char *getTargetClusterComponentName(const char *clustname, const char *processType, StringBuffer &name)
{
    if (!clustname)
        return NULL;
    Owned<IRemoteConnection> conn = querySDS().connect("Environment", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
    if (!conn)
        return NULL;
    StringBuffer xpath;

    xpath.appendf("Software/Topology/Cluster[@name=\"%s\"]", clustname);
    Owned<IPropertyTree> cluster = conn->queryRoot()->getPropTree(xpath.str());
    if (!cluster) 
        return NULL;

    StringBuffer xpath1;
    xpath1.appendf("%s/@process", processType);
    name.append(cluster->queryProp(xpath1.str()));
    return name.str();
}

unsigned getEnvironmentThorClusterNames(StringArray &thorNames, StringArray &groupNames, StringArray &targetNames)
{
    Owned<IRemoteConnection> conn = querySDS().connect("Environment", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
    if (!conn)
        return 0;
    Owned<IPropertyTreeIterator> allTargets = conn->queryRoot()->getElements("Software/Topology/Cluster");
    ForEach(*allTargets)
    {
        IPropertyTree &target = allTargets->query();
        const char *targetName = target.queryProp("@name");
        if (targetName && *targetName)
        {
            Owned<IPropertyTreeIterator> thorClusters = target.getElements("ThorCluster");
            ForEach(*thorClusters)
            {
                const char *thorName = thorClusters->query().queryProp("@process");
                VStringBuffer query("Software/ThorCluster[@name=\"%s\"]",thorName);
                IPropertyTree *thorCluster = conn->queryRoot()->queryPropTree(query.str());
                if (thorCluster)
                {
                    const char *groupName = thorCluster->queryProp("@nodeGroup");
                    if (!groupName||!*groupName)
                        groupName = thorName;
                    thorNames.append(thorName);
                    groupNames.append(groupName);
                    targetNames.append(targetName);
                }
            }
        }
    }
    return thorNames.ordinality();
}


IStringVal& CLocalWorkUnit::getScope(IStringVal &str) const 
{
    CriticalBlock block(crit);
    if (p->hasProp("Debug/ForceScope"))
    {
        StringBuffer prefix(p->queryProp("Debug/ForceScope"));
        str.set(prefix.toLowerCase().str()); 
    }
    else
    {
        Owned <IConstWUClusterInfo> ci = getTargetClusterInfo(p->queryProp("@clusterName"));
        if (ci)
            ci->getScope(str); 
        else
            str.clear();
    }
    return str;
}

//Queries
void CLocalWorkUnit::setCodeVersion(unsigned codeVersion, const char * buildVersion, const char * eclVersion) 
{
    CriticalBlock block(crit);
    p->setPropInt("@codeVersion", codeVersion);
    p->setProp("@buildVersion", buildVersion);
    p->setProp("@eclVersion", eclVersion);
}

unsigned CLocalWorkUnit::getCodeVersion() const 
{
    CriticalBlock block(crit);
    return p->getPropInt("@codeVersion");
}

void CLocalWorkUnit::getBuildVersion(IStringVal & buildVersion, IStringVal & eclVersion) const 
{
    CriticalBlock block(crit);
    buildVersion.set(p->queryProp("@buildVersion"));
    eclVersion.set(p->queryProp("@eclVersion"));
}

void CLocalWorkUnit::setCloneable(bool value) 
{
    CriticalBlock block(crit);
    p->setPropInt("@cloneable", value);
}

void CLocalWorkUnit::setIsClone(bool value) 
{
    CriticalBlock block(crit);
    p->setPropInt("@isClone", value);
}

bool CLocalWorkUnit::getCloneable() const 
{
    CriticalBlock block(crit);
    return p->getPropBool("@cloneable", false);
}

IUserDescriptor *CLocalWorkUnit::queryUserDescriptor() const
{
    CriticalBlock block(crit);
    if (!userDesc)
    {
        SCMStringBuffer token, user, password;
        getSecurityToken(token);
        SCMStringBuffer wuid;
        getWuid(wuid);
        extractToken(token.str(), wuid.str(), user, password);
        userDesc.setown(createUserDescriptor());
        userDesc->set(user.str(), password.str());
    }
    return userDesc;
}

void CLocalWorkUnit::setCombineQueries(unsigned combine) 
{
    CriticalBlock block(crit);
    p->setPropInt("COMBINE_QUERIES", combine);
}

unsigned CLocalWorkUnit::getCombineQueries() const 
{
    CriticalBlock block(crit);
    return p->getPropInt("COMBINE_QUERIES");
}

bool CLocalWorkUnit::isProtected() const
{
    CriticalBlock block(crit);
    return p->getPropBool("@protected", false);
}

bool CLocalWorkUnit::isPausing() const
{
    CriticalBlock block(crit);
    if (WUActionPause == getAction())
    {
        switch (getState())
        {
            case WUStateRunning:
            case WUStateAborting:
                return true;
        }
    }
    return false;
}

void CLocalWorkUnit::protect(bool protectMode)
{
    CriticalBlock block(crit);
    p->setPropBool("@protected", protectMode);
}

bool CLocalWorkUnit::isBilled() const
{
    CriticalBlock block(crit);
    return p->getPropBool("@billed", false);
}

void CLocalWorkUnit::setBilled(bool value)
{
    CriticalBlock block(crit);
    p->setPropBool("@billed", value);
}

void CLocalWorkUnit::setResultLimit(unsigned value)
{
    CriticalBlock block(crit);
    p->setPropInt("resultLimit", value);
}

unsigned CLocalWorkUnit::getResultLimit() const
{
    CriticalBlock block(crit);
    return p->getPropInt("resultLimit");
}

void CLocalWorkUnit::setCompareMode(WUCompareMode value)
{
    CriticalBlock block(crit);
    p->setPropInt("comparemode", (int)value);
}

WUCompareMode CLocalWorkUnit::getCompareMode() const
{
    CriticalBlock block(crit);
    return (WUCompareMode) p->getPropInt("comparemode");
}

IStringVal & CLocalWorkUnit::getSnapshot(IStringVal & str) const
{
    CriticalBlock block(crit);
    str.set(p->queryProp("SNAPSHOT")); 
    return str;
}

void CLocalWorkUnit::setSnapshot(const char * val)
{
    CriticalBlock block(crit);
    p->setProp("SNAPSHOT", val);
}

static int comparePropTrees(IInterface **ll, IInterface **rr)
{
    IPropertyTree *l = (IPropertyTree *) *ll;
    IPropertyTree *r = (IPropertyTree *) *rr;
    return stricmp(l->queryName(), r->queryName());
};

unsigned CLocalWorkUnit::calculateHash(unsigned crc)
{
    // Any other values in the WU that could affect generated code should be crc'ed here
    IPropertyTree *tree = p->queryBranch("Debug");
    if (tree)
    {
        Owned<IPropertyTreeIterator> sub = tree->getElements("*");
        ICopyArrayOf<IPropertyTree> subs;
        for(sub->first(); sub->isValid(); sub->next())
            subs.append(sub->query());
        subs.sort(comparePropTrees);
        ForEachItemIn(idx, subs)
        {
            const char *name = subs.item(idx).queryName();
            const char *val = subs.item(idx).queryProp(NULL);
            crc = crc32(name, (size32_t)strlen(name), crc);
            if (val)
                crc = crc32(val, (size32_t)strlen(val), crc);
        }
    }
    Owned<IConstWUPluginIterator> plugins = &getPlugins();
    for (plugins->first();plugins->isValid();plugins->next())
    {
        IConstWUPlugin &thisplugin = plugins->query();
        SCMStringBuffer version;
        thisplugin.getPluginVersion(version);
        crc = crc32(version.str(), version.length(), crc);
    }
    return crc;
}

static void updateProp(IPropertyTree * to, const IPropertyTree * from, const char * xpath)
{
    if (!to->hasProp(xpath) && from->hasProp(xpath))
        to->setProp(xpath, from->queryProp(xpath));
}


static void copyTree(IPropertyTree * to, const IPropertyTree * from, const char * xpath)
{
    IPropertyTree * match = from->getBranch(xpath); 
    if (match) 
        to->setPropTree(xpath, match);
}

void CLocalWorkUnit::copyWorkUnit(IConstWorkUnit *cached)
{
    CLocalWorkUnit *from = QUERYINTERFACE(cached, CLocalWorkUnit);
    if (!from)
    {
        CLockedWorkUnit *fl = QUERYINTERFACE(cached, CLockedWorkUnit);
        if (!fl)
            throw MakeStringException(WUERR_InternalUnknownImplementation, "Cached workunit not created using workunit dll");
        from = fl->c;
    }
    // Need to copy the query, the results, and the graphs from the cached query.
    // The cache is made before the query is executed so there is no need to clear them.
    if (!cached->getCloneable())
        throw MakeStringException(WUERR_CannotCloneWorkunit, "Source work unit not marked as clonable");

    const IPropertyTree * fromP = from->p;
    IPropertyTree *pt;

    CriticalBlock block(crit);
    query.clear();
    updateProp(p, fromP, "@jobName");
    copyTree(p, fromP, "Query");
    pt = fromP->getBranch("Application/LibraryModule"); 
    if (pt)
    {
        ensurePTree(p, "Application");
        p->setPropTree("Application/LibraryModule", pt);
    }

    pt = fromP->queryBranch("Debug"); 
    if (pt)
    {
        IPropertyTree *curDebug = p->queryPropTree("Debug");
        if (curDebug)
        {
            Owned<IPropertyTreeIterator> elems = pt->getElements("*");
            ForEach(*elems)
            {
                IPropertyTree *elem = &elems->query();
                if (!curDebug->hasProp(elem->queryName()))
                    curDebug->setPropTree(elem->queryName(),LINK(elem));
            }
        }
        else
            p->setPropTree("Debug", LINK(pt));
    }
    copyTree(p, fromP, "Plugins");
    copyTree(p, fromP, "Libraries");
    copyTree(p, fromP, "Results");
    copyTree(p, fromP, "Graphs");
    copyTree(p, fromP, "Workflow");

    updateProp(p, fromP, "@clusterName");
    updateProp(p, fromP, "allowedclusters");
    updateProp(p, fromP, "@submitID");
    updateProp(p, fromP, "CustomerID");
    updateProp(p, fromP, "SNAPSHOT");

    //Variables may have been set up as parameters to the query - so need to preserve any values that were supplied.
    pt = fromP->getBranch("Variables");
    if (pt)
    {
        IPropertyTree *ptTgtVariables = ensurePTree(p, "Variables");

        Owned<IPropertyTreeIterator> ptiVariable = pt->getElements("Variable");
        for (ptiVariable->first(); ptiVariable->isValid(); ptiVariable->next())
        {
            IPropertyTree *ptSrcVariable = &ptiVariable->query();
            const char *name = ptSrcVariable->queryProp("@name");
            assertex(name);
            StringBuffer xpath;
            xpath.append("Variable[@name='").append(name).append("']");
            IPropertyTree *ptTgtVariable = ptTgtVariables->queryPropTree(xpath.str());
            IPropertyTree *merged = createPTreeFromIPT(ptSrcVariable); // clone entire source info...
            merged->removeProp("Value"); // except value and status
            merged->setProp("@status", "undefined");
            if (!merged->getPropBool("@isScalar"))
                merged->removeProp("totalRowCount");
            merged->removeProp("rowCount");
            // If there are any other fields that get set ONLY by eclagent, strip them out here...

            if (ptTgtVariable)
            {
                // copy status and Value from what is already set in target
                merged->setProp("@status", ptTgtVariable->queryProp("@status"));
                MemoryBuffer value;
                if (ptTgtVariable->getPropBin("Value", value))
                    merged->setPropBin("Value", value.length(), value.toByteArray());
                ptTgtVariable->removeProp(xpath.str());

                // If there are any other fields in a variable that get set by ws_ecl before submitting, copy them across here...
            }
            ptTgtVariables->addPropTree("Variable", merged);
        }
        pt->Release();
    }

    p->setProp("@codeVersion", fromP->queryProp("@codeVersion"));
    p->setPropBool("@cloneable", true);
    p->setPropBool("@isClone", true);
    resetWorkflow();  // the source Workflow section may have had some parts already executed...
    // resetResults(); // probably should be resetting the results as well... rather than waiting for the rerun to overwrite them
}

bool CLocalWorkUnit::hasDebugValue(const char *propname) const
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    return p->hasProp(prop.append(lower));
}

IStringVal& CLocalWorkUnit::getDebugValue(const char *propname, IStringVal &str) const
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    str.set(p->queryProp(prop.append(lower).str())); 
    return str;
}

IStringIterator& CLocalWorkUnit::getDebugValues() const
{
    return getDebugValues(NULL);
}

IStringIterator& CLocalWorkUnit::getDebugValues(const char *prop) const
{
    CriticalBlock block(crit);
    StringBuffer path("Debug/");
    if (prop)
    {
        StringBuffer lower;
        lower.append(prop).toLowerCase();
        path.append(lower);
    }
    else
        path.append("*");
    return *new CStringPTreeTagIterator(p->getElements(path.str()));
}

int CLocalWorkUnit::getDebugValueInt(const char *propname, int defVal) const
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    prop.append(lower);
    return p->getPropInt(prop.str(), defVal); 
}

__int64 CLocalWorkUnit::getDebugValueInt64(const char *propname, __int64 defVal) const
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    prop.append(lower);
    return p->getPropInt64(prop.str(), defVal); 
}

bool CLocalWorkUnit::getDebugValueBool(const char * propname, bool defVal) const
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    prop.append(lower);
    return p->getPropBool(prop.str(), defVal); 
}

void CLocalWorkUnit::setDebugValue(const char *propname, const char *value, bool overwrite)
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    prop.append(lower);
    if (overwrite || !p->hasProp(prop.str()))
    {
        // MORE - not sure this line should be needed....
        p->setProp("Debug", ""); 
        p->setProp(prop.str(), value); 
    }
}

void CLocalWorkUnit::setDebugValueInt(const char *propname, int value, bool overwrite)
{
    StringBuffer lower;
    lower.append(propname).toLowerCase();
    CriticalBlock block(crit);
    StringBuffer prop("Debug/");
    prop.append(lower);
    if (overwrite || !p->hasProp(prop.str()))
    {
        // MORE - not sure this line should be needed....
        p->setProp("Debug", ""); 
        p->setPropInt(prop.str(), value); 
    }
}

void CLocalWorkUnit::setTracingValue(const char *propname, const char *value)
{
    CriticalBlock block(crit);
    // MORE - not sure this line should be needed....
    p->setProp("Tracing", ""); 
    StringBuffer prop("Tracing/");
    p->setProp(prop.append(propname).str(), value); 
}

void CLocalWorkUnit::setTracingValueInt(const char *propname, int value)
{
    CriticalBlock block(crit);
    StringBuffer prop("Tracing/");
    p->setPropInt(prop.append(propname).str(), value); 
}

IConstWUQuery* CLocalWorkUnit::getQuery() const
{
    // For this to be legally called, we must have the read-able interface. So we are already locked for (at least) read.
    CriticalBlock block(crit);
    if (!query)
    {
        IPropertyTree *s = p->getPropTree("Query");
        if (s)
            query.setown(new CLocalWUQuery(s)); 
    }
    return query.getLink();
}

IWUQuery* CLocalWorkUnit::updateQuery()
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    if (!query)
    {
        IPropertyTree *s = p->queryPropTree("Query");
        if (!s)
            s = p->addPropTree("Query", createPTreeFromXMLString("<Query fetchEntire='1'/>"));
        s->Link();
        query.setown(new CLocalWUQuery(s)); 
    }
    return query.getLink();
}

void CLocalWorkUnit::loadPlugins() const
{
    CriticalBlock block(crit);
    if (!pluginsCached)
    {
        assertex(plugins.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Plugins/Plugin");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            plugins.append(*new CLocalWUPlugin(rp));
        }
        pluginsCached = true;
    }
}

IConstWUPluginIterator& CLocalWorkUnit::getPlugins() const
{
    CriticalBlock block(crit);
    loadPlugins();
    return *new CArrayIteratorOf<IConstWUPlugin,IConstWUPluginIterator> (plugins, 0, (IConstWorkUnit *) this);
}

void CLocalWorkUnit::loadLibraries() const
{
    CriticalBlock block(crit);
    if (!librariesCached)
    {
        assertex(libraries.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Libraries/Library");
        ForEach(*r)
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            libraries.append(*new CLocalWULibrary(rp));
        }
        librariesCached = true;
    }
}

IConstWULibraryIterator& CLocalWorkUnit::getLibraries() const
{
    CriticalBlock block(crit);
    loadLibraries();
    return *new CArrayIteratorOf<IConstWULibrary,IConstWULibraryIterator> (libraries, 0, (IConstWorkUnit *) this);
}

IConstWULibrary * CLocalWorkUnit::getLibraryByName(const char * search) const
{
    CriticalBlock block(crit);
    loadLibraries();
    ForEachItemIn(idx, libraries)
    {
        SCMStringBuffer name;
        IConstWULibrary &cur = libraries.item(idx);
        cur.getName(name);
        if (stricmp(name.str(), search)==0)
            return &OLINK(cur);
    }
    return NULL;
}

unsigned CLocalWorkUnit::getTimerDuration(const char *name, const char *_unused) const
{
    CriticalBlock block(crit);
    StringBuffer pname;
    pname.appendf("Timings/Timing[@name=\"%s\"]/@duration", name);
    return p->getPropInt(pname.str(), 0);
}

unsigned CLocalWorkUnit::getTimerCount(const char *name, const char *_unused) const
{
    CriticalBlock block(crit);
    StringBuffer pname;
    pname.appendf("Timings/Timing[@name=\"%s\"]/@count", name);
    return p->getPropInt(pname.str(), 0);
}

IStringIterator& CLocalWorkUnit::getTimers() const
{
    CriticalBlock block(crit);
    return *new CStringPTreeAttrIterator(p->getElements("Timings/Timing"), "@name");
}

StringBuffer &formatGraphTimerLabel(StringBuffer &str, const char *graphName, unsigned subGraphNum, unsigned __int64 subId)
{
    str.append("Graph ").append(graphName);
    if (subGraphNum) str.append(" - ").append(subGraphNum).append(" (").append(subId).append(")");
    else if (subId) str.append(" - id(").append(subId).append(")");
    return str;
}

bool parseGraphTimerLabel(const char *label, StringBuffer &graphName, unsigned &subGraphNum, unsigned __int64 &subId)
{
    // expects format: "Graph <graphname>[ - <subgraphnum> (<subgraphid>)]"
    unsigned len = (size32_t)strlen(label);
    if (len < 6 || (0 != memcmp(label, "Graph ", 6)))
        return false;
    subGraphNum = 0;
    subId = 0;
    const char *finger = label+6;
    const char *finger2 = strchr(finger, '-');
    if (NULL == finger2) // just graphName
        graphName.append(finger);
    else
    {
        graphName.append((size32_t)((finger2-1)-finger), finger);
        finger = finger2+2; // skip '-' and space
        finger2 = strchr(finger, ' ');
        if (finger2)
        {
            subGraphNum = atoi_l(finger, (size32_t)(finger2-finger));
            finger = finger2+2; // skip space and '('
            finger2 = strchr(finger, ')');
            if (finger2)
                subId = atoi64_l(finger, (size32_t)(finger2-finger));
        }
        else if (((len-(finger-label))>3) && 0 == memcmp(finger, "id(", 3)) // subgraph id only, new format.
        {
            finger += 3;
            finger2 = strchr(finger, ')');
            if (finger2)
                subId = atoi64_l(finger, (size32_t)(finger2-finger));
        }
    }
    return true;
}

void CLocalWorkUnit::setTimerInfo(const char *name, const char *subname, unsigned ms, unsigned count, unsigned max)
{
    CriticalBlock block(crit);
    IPropertyTree *timings = p->queryPropTree("Timings");
    if (!timings)
        timings = p->addPropTree("Timings", createPTree("Timings"));
    StringBuffer fullname;
    if (subname)
        fullname.append('.').append(subname);
    fullname.append(name);
    StringBuffer xpath;
    xpath.append("Timing[@name=\"").append(fullname).append("\"]");
    IPropertyTree *timing = timings->queryPropTree(xpath.str());
    if (!timing)
    {
        timing = timings->addPropTree("Timing", createPTree("Timing"));
        timing->setProp("@name", fullname.str());
    }
    timing->setPropInt("@count", count);
    timing->setPropInt("@duration", ms);
    if (!max && 1==count) max = ms;
    if (max)
        timing->setPropInt("@max", max);
}

void CLocalWorkUnit::setTimeStamp(const char *application, const char *instance, const char *event, bool add)
{
    CriticalBlock block(crit);
    char timeStamp[64];
    time_t tNow;
    time(&tNow);
#ifdef _WIN32
    struct tm *gmtNow;
    gmtNow = gmtime(&tNow);
    strftime(timeStamp, 64, "%Y-%m-%dT%H:%M:%SZ", gmtNow);
#else
    struct tm gmtNow;
    gmtime_r(&tNow, &gmtNow);
    strftime(timeStamp, 64, "%Y-%m-%dT%H:%M:%SZ", &gmtNow);
#endif //_WIN32
    IPropertyTree *ts = p->queryPropTree("TimeStamps");
    if (!ts) {
        ts = p->addPropTree("TimeStamps", createPTree("TimeStamps"));
        add = true;
    }
    IPropertyTree *t=NULL;
    if (!add) {
        StringBuffer path;
        path.appendf("TimeStamp[@application=\"%s\"]",application);
        t = ts->queryBranch(path.str());
    }
    if (!t) {
        t = createPTree("TimeStamp");
        t->setProp("@application", application);
        add = true;
    }
    if (instance)
        t->setProp("@instance", instance);
    t->setProp(event, timeStamp);

    IPropertyTree *et = t->queryPropTree(event);
    if(et)
        et->setPropInt("@ts",(int)tNow);
    if (add)
        ts->addPropTree("TimeStamp", t);
}

void CLocalWorkUnit::setTimeStamp(const char *application, const char *instance, const char *event)
{
    setTimeStamp(application,instance,event,false);
}

void CLocalWorkUnit::addTimeStamp(const char *application, const char *instance, const char *event)
{
    setTimeStamp(application,instance,event,true);
}

IStringVal &CLocalWorkUnit::getTimeStamp(const char *name, const char *application, IStringVal &str) const
{
    CriticalBlock block(crit);

    str.clear();

    StringBuffer pname("TimeStamps/TimeStamp");
    if (application)
        pname.appendf("[@application=\"%s\"]", application);
    pname.appendf("/%s", name);

    Owned<IPropertyTreeIterator> stamps = p->getElements(pname.str());
    if (stamps && stamps->first())
        str.set(stamps->query().queryProp(NULL));

    return str;
}

IConstWUTimeStampIterator& CLocalWorkUnit::getTimeStamps() const
{
    CriticalBlock block(crit);
    timestamps.load(p,"TimeStamps/*");
    return *new CArrayIteratorOf<IConstWUTimeStamp,IConstWUTimeStampIterator> (timestamps, 0, (IConstWorkUnit *) this);
}

bool CLocalWorkUnit::getWuDate(unsigned & year, unsigned & month, unsigned& day)
{
    CriticalBlock block(crit);
    SCMStringBuffer wuidstr;
    const char *wuid = getWuid(wuidstr).str();

    if (sscanf(wuid, "W%4u%2u%2u", &year, &month, &day)==3)
    {
    }
    
    return false;
}

IWUPlugin* CLocalWorkUnit::updatePluginByName(const char *qname)
{
    CriticalBlock block(crit);
    IConstWUPlugin *existing = getPluginByName(qname);
    if (existing)
        return (IWUPlugin *) existing;
    if (!plugins.length())
        p->addPropTree("Plugins", createPTree("Plugins"));
    IPropertyTree *pl = p->queryPropTree("Plugins");
    IPropertyTree *s = pl->addPropTree("Plugin", createPTree("Plugin"));
    s->Link();
    IWUPlugin* q = new CLocalWUPlugin(s); 
    q->Link();
    plugins.append(*q);
    q->setPluginName(qname);
    return q;
}

IConstWUPlugin* CLocalWorkUnit::getPluginByName(const char *qname) const
{
    CriticalBlock block(crit);
    loadPlugins();
    ForEachItemIn(idx, plugins)
    {
        SCMStringBuffer name;
        IConstWUPlugin &cur = plugins.item(idx);
        cur.getPluginName(name);
        if (stricmp(name.str(), qname)==0)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IWULibrary* CLocalWorkUnit::updateLibraryByName(const char *qname)
{
    CriticalBlock block(crit);
    IConstWULibrary *existing = getLibraryByName(qname);
    if (existing)
        return (IWULibrary *) existing;
    if (!libraries.length())
        p->addPropTree("Libraries", createPTree("Libraries"));
    IPropertyTree *pl = p->queryPropTree("Libraries");
    IPropertyTree *s = pl->addPropTree("Library", createPTree("Library"));
    s->Link();
    IWULibrary* q = new CLocalWULibrary(s); 
    q->Link();
    libraries.append(*q);
    q->setName(qname);
    return q;
}

void CLocalWorkUnit::loadExceptions() const
{
    CriticalBlock block(crit);
    if (!exceptionsCached)
    {
        
        assertex(exceptions.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Exceptions/Exception");


        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            exceptions.append(*new CLocalWUException(rp));
        }
        exceptionsCached = true;
    }
}

IConstWUExceptionIterator& CLocalWorkUnit::getExceptions() const
{
    CriticalBlock block(crit);
    loadExceptions();
    return *new CArrayIteratorOf<IConstWUException,IConstWUExceptionIterator> (exceptions, 0, (IConstWorkUnit *) this);
}

unsigned CLocalWorkUnit::getExceptionCount() const
{
    CriticalBlock block(crit);
    loadExceptions();
    return exceptions.length();
}

void CLocalWorkUnit::clearExceptions()
{
    CriticalBlock block(crit);
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    exceptions.kill();
    exceptionsCached = true;
    p->removeProp("Exceptions");
}


IWUException* CLocalWorkUnit::createException()
{
    CriticalBlock block(crit);
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    loadExceptions();

    if (!exceptions.length())
        p->addPropTree("Exceptions", createPTree("Exceptions"));
    IPropertyTree *r = p->queryPropTree("Exceptions");
    IPropertyTree *s = r->addPropTree("Exception", createPTree("Exception"));
    IWUException* q = new CLocalWUException(LINK(s)); 
    exceptions.append(*LINK(q));

    Owned<IJlibDateTime> now = createDateTimeNow();
    SCMStringBuffer temp;
    now->getString(temp);
    q->setTimeStamp(temp.str());
    return q;
}


IConstWUWebServicesInfo* CLocalWorkUnit::getWebServicesInfo() const
{
    // For this to be legally called, we must have the read-able interface. So we are already locked for (at least) read.
    CriticalBlock block(crit);
    if (!webServicesInfoCached)
    {
        assertex(!webServicesInfo);
        IPropertyTree *s = p->getPropTree("WebServicesInfo");
        if (s)
            webServicesInfo.setown(new CLocalWUWebServicesInfo(s)); 
        webServicesInfoCached = true;
    }
    return webServicesInfo.getLink();
}

IWUWebServicesInfo* CLocalWorkUnit::updateWebServicesInfo(bool create)
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    if (!webServicesInfoCached)
    {
        IPropertyTree *s = p->queryPropTree("WebServicesInfo");
        if (!s)
        {
            if (create)
                s = p->addPropTree("WebServicesInfo", createPTreeFromXMLString("<WebServicesInfo />"));
            else
                return NULL;
        }
        s->Link();
        webServicesInfo.setown(new CLocalWUWebServicesInfo(s)); 
        webServicesInfoCached = true;
    }
    return webServicesInfo.getLink();
}

IConstWURoxieQueryInfo* CLocalWorkUnit::getRoxieQueryInfo() const
{
    // For this to be legally called, we must have the read-able interface. So we are already locked for (at least) read.
    CriticalBlock block(crit);
    if (!roxieQueryInfoCached)
    {
        assertex(!roxieQueryInfo);
        IPropertyTree *s = p->getPropTree("RoxieQueryInfo");
        if (s)
            roxieQueryInfo.setown(new CLocalWURoxieQueryInfo(s)); 
        roxieQueryInfoCached = true;
    }
    return roxieQueryInfo.getLink();
}

IWURoxieQueryInfo* CLocalWorkUnit::updateRoxieQueryInfo(const char *wuid, const char *roxieClusterName)
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    if (!roxieQueryInfoCached)
    {
        IPropertyTree *s = p->queryPropTree("RoxieQueryInfo");
        if (!s)
            s = p->addPropTree("RoxieQueryInfo", createPTreeFromXMLString("<RoxieQueryInfo />"));
        if (wuid && *wuid)
            s->addProp("@wuid", wuid);

        if (roxieClusterName && *roxieClusterName)
            s->addProp("@roxieClusterName", roxieClusterName);

        s->Link();
        roxieQueryInfo.setown(new CLocalWURoxieQueryInfo(s)); 
        roxieQueryInfoCached = true;
    }
    return roxieQueryInfo.getLink();
}

static int compareResults(IInterface **ll, IInterface **rr)
{
    CLocalWUResult *l = (CLocalWUResult *) *ll;
    CLocalWUResult *r = (CLocalWUResult *) *rr;
    return l->getResultSequence() - r->getResultSequence();
}

void CLocalWorkUnit::loadResults() const
{
    CriticalBlock block(crit);
    if (!resultsCached)
    {
        assertex(results.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Results/Result");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();

            rp->Link();
            results.append(*new CLocalWUResult(rp));
        }
        results.sort(compareResults);
        resultsCached = true;
    }
}

void CLocalWorkUnit::loadVariables() const
{
    CriticalBlock block(crit);
    if (!variablesCached)
    {
        assertex(variables.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Variables/Variable");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            variables.append(*new CLocalWUResult(rp));
        }
        variablesCached = true;
    }
}

void CLocalWorkUnit::loadTemporaries() const
{
    CriticalBlock block(crit);
    if (!temporariesCached)
    {
        assertex(temporaries.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Temporaries/Variable");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            temporaries.append(*new CLocalWUResult(rp));
        }
        temporariesCached = true;
    }
}

IWUResult* CLocalWorkUnit::createResult()
{
    CriticalBlock block(crit);
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    loadResults();
    if (!results.length())
        p->addPropTree("Results", createPTree("Results"));
    IPropertyTree *r = p->queryPropTree("Results");
    IPropertyTree *s = r->addPropTree("Result", createPTreeFromXMLString("<Result fetchEntire='1'/>"));

    s->Link();
    IWUResult* q = new CLocalWUResult(s); 
    q->Link();
    results.append(*q);
    return q;
}

IWUResult* CLocalWorkUnit::updateResultByName(const char *qname)
{
    CriticalBlock block(crit);
    IConstWUResult *existing = getResultByName(qname);
    if (existing)
        return (IWUResult *) existing;
    IWUResult* q = createResult(); 
    q->setResultName(qname);
    return q;
}

IWUResult* CLocalWorkUnit::updateResultBySequence(unsigned seq)
{
    CriticalBlock block(crit);
    IConstWUResult *existing = getResultBySequence(seq);
    if (existing)
        return (IWUResult *) existing;
    IWUResult* q = createResult(); 
    q->setResultSequence(seq);
    return q;
}

IConstWUResultIterator& CLocalWorkUnit::getResults() const
{
    CriticalBlock block(crit);
    loadResults();
    return *new CArrayIteratorOf<IConstWUResult,IConstWUResultIterator> (results, 0, (IConstWorkUnit *) this);
}

IConstWUResult* CLocalWorkUnit::getResultByName(const char *qname) const
{
    CriticalBlock block(crit);
    loadResults();
    ForEachItemIn(idx, results)
    {
        SCMStringBuffer name;
        IConstWUResult &cur = results.item(idx);
        cur.getResultName(name);
        if (stricmp(name.str(), qname)==0)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IConstWUResult* CLocalWorkUnit::getResultBySequence(unsigned seq) const
{
    CriticalBlock block(crit);
    loadResults();
    ForEachItemIn(idx, results)
    {
        IConstWUResult &cur = results.item(idx);
        if (cur.getResultSequence() == seq)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IConstWUResultIterator& CLocalWorkUnit::getVariables() const
{
    CriticalBlock block(crit);
    loadVariables();
    return *new CArrayIteratorOf<IConstWUResult,IConstWUResultIterator> (variables, 0, (IConstWorkUnit *) this);
}

IConstWUResult* CLocalWorkUnit::getGlobalByName(const char *qname) const
{
    CriticalBlock block(crit);
    if (strcmp(p->queryName(), GLOBAL_WORKUNIT)==0)
        return getVariableByName(qname);
    Owned <IConstWorkUnit> global = factory->openWorkUnit(GLOBAL_WORKUNIT, false);
    if (!global)
        global.setown(factory->createWorkUnit(NULL, NULL, NULL));
    return global->getVariableByName(qname);
}

IWUResult* CLocalWorkUnit::updateGlobalByName(const char *qname)
{
    CriticalBlock block(crit);
    if (strcmp(p->queryName(), GLOBAL_WORKUNIT)==0)
        return updateVariableByName(qname);

    Owned <IWorkUnit> global = factory->ensureNamedWorkUnit(GLOBAL_WORKUNIT);
    return global->updateVariableByName(qname);
}

IConstWUResult* CLocalWorkUnit::getVariableByName(const char *qname) const
{
    CriticalBlock block(crit);
    loadVariables();
    ForEachItemIn(idx, variables)
    {
        SCMStringBuffer name;
        IConstWUResult &cur = variables.item(idx);
        cur.getResultName(name);
        if (stricmp(name.str(), qname)==0)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IConstWUResult* CLocalWorkUnit::getTemporaryByName(const char *qname) const
{
    CriticalBlock block(crit);
    loadTemporaries();
    ForEachItemIn(idx, temporaries)
    {
        SCMStringBuffer name;
        IConstWUResult &cur = temporaries.item(idx);
        cur.getResultName(name);
        if (stricmp(name.str(), qname)==0)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IConstWUResultIterator& CLocalWorkUnit::getTemporaries() const
{
    CriticalBlock block(crit);
    loadTemporaries();
    return *new CArrayIteratorOf<IConstWUResult,IConstWUResultIterator> (temporaries, 0, (IConstWorkUnit *) this);
}

IWUResult* CLocalWorkUnit::updateTemporaryByName(const char *qname)
{
    CriticalBlock block(crit);
    IConstWUResult *existing = getTemporaryByName(qname);
    if (existing)
        return (IWUResult *) existing;
    if (!temporaries.length())
        p->addPropTree("Temporaries", createPTree("Temporaries"));
    IPropertyTree *vars = p->queryPropTree("Temporaries");
    IPropertyTree *s = vars->addPropTree("Variable", createPTree("Variable"));
    s->Link();
    IWUResult* q = new CLocalWUResult(s); 
    q->Link();
    temporaries.append(*q);
    q->setResultName(qname);
    return q;
}

IWUResult* CLocalWorkUnit::updateVariableByName(const char *qname)
{
    CriticalBlock block(crit);
    IConstWUResult *existing = getVariableByName(qname);
    if (existing)
        return (IWUResult *) existing;
    if (!variables.length())
        p->addPropTree("Variables", createPTree("Variables"));
    IPropertyTree *vars = p->queryPropTree("Variables");
    IPropertyTree *s = vars->addPropTree("Variable", createPTree("Variable"));
    s->Link();
    IWUResult* q = new CLocalWUResult(s); 
    q->Link();
    variables.append(*q);
    q->setResultName(qname);
    return q;
}

void CLocalWorkUnit::deleteTempFiles(const char *graph, bool deleteOwned, bool deleteJobOwned)
{
    CriticalBlock block(crit);
    IPropertyTree *files = p->queryPropTree("Files");
    if (!files) return;
    Owned<IPropertyTreeIterator> iter = files->getElements("File");
    ICopyArrayOf<IPropertyTree> toRemove;
    ForEach (*iter)
    {
        IPropertyTree &file = iter->query();
        WUFileKind fileKind = (WUFileKind) file.getPropInt("@kind", WUFileStandard);
        if(file.getPropBool("@temporary")) fileKind = WUFileTemporary; // @temporary, legacy check
        bool needDelete;
        switch(fileKind)
        {
        case WUFileTemporary:
            if(graph==NULL)
                needDelete = true;
            else
            {
                const char *graphOwner = file.queryProp("@graph");
                needDelete = ((graphOwner==NULL) || (strcmp(graph, graphOwner)==0));
            }
            break;
        case WUFileJobOwned:
            needDelete = ((graph==NULL) && deleteJobOwned);
            break;
        case WUFileOwned:
            needDelete = ((graph==NULL) && deleteOwned);
            break;
        default:
            needDelete = false;
        }
        if(needDelete)
        {
            const char *name = file.queryProp("@name");
            LOG(MCdebugProgress, unknownJob, "Removing workunit file %s from DFS", name);
            queryDistributedFileDirectory().removePhysical(name, 0, NULL, NULL, queryUserDescriptor());
            toRemove.append(file);
        }
    }
    ForEachItemIn(r, toRemove) files->removeTree(&toRemove.item(r));
}

static void _noteFileRead(IDistributedFile *file, IPropertyTree *filesRead)
{
    IDistributedSuperFile *super = file->querySuperFile();
    StringBuffer fname;
    file->getLogicalName(fname);
    StringBuffer path("File[@name=\"");
    path.append(fname).append("\"]");
    IPropertyTree *fileTree = filesRead->queryPropTree(path.str());
    if (fileTree)
        fileTree->setPropInt("@useCount", fileTree->getPropInt("@useCount")+1);
    else
    {
        StringBuffer cluster;
        file->getClusterName(0,cluster);
        fileTree = createPTree();
        fileTree->setProp("@name", fname.str());
        fileTree->setProp("@cluster", cluster.str());
        fileTree->setPropInt("@useCount", 1);
        fileTree = filesRead->addPropTree("File", fileTree);
    }
    
    if (super)
    {
        Owned<IDistributedFileIterator> iter = super->getSubFileIterator(false);
        ForEach (*iter)
        {
            IDistributedFile &file = iter->query();
            StringBuffer fname;
            file.getLogicalName(fname);
            Owned<IPropertyTree> subfile = createPTree();
            subfile->setProp("@name", fname.str());
            fileTree->addPropTree("Subfile", subfile.getClear());
            _noteFileRead(&file, filesRead);
        }
    }
}

void CLocalWorkUnit::noteFileRead(IDistributedFile *file)
{
    CriticalBlock block(crit);
    IPropertyTree *files = p->queryPropTree("FilesRead");
    if (!files)
        files = p->addPropTree("FilesRead", createPTree());
    _noteFileRead(file, files);
}

static void addFile(IPropertyTree *files, const char *fileName, const char *cluster, unsigned usageCount, WUFileKind fileKind, const char *graphOwner)
{
    StringBuffer path("File[@name=\"");
    path.append(fileName).append("\"]");
    if (cluster)
        path.append("[@cluster=\"").append(cluster).append("\"]");
    IPropertyTree *file = files->queryPropTree(path.str());
    if (file) files->removeTree(file);
    file = createPTree();
    file->setProp("@name", fileName);
    if (cluster)
        file->setProp("@cluster", cluster);
    if (graphOwner)
        file->setProp("@graph", graphOwner);
    file->setPropInt("@kind", (unsigned)fileKind);
    if (WUFileTemporary == fileKind)
        file->setPropInt("@usageCount", usageCount);
    files->addPropTree("File", file);
}

void CLocalWorkUnit::addFile(const char *fileName, StringArray *clusters, unsigned usageCount, WUFileKind fileKind, const char *graphOwner)
{
    CriticalBlock block(crit);
    IPropertyTree *files = p->queryPropTree("Files");
    if (!files)
        files = p->addPropTree("Files", createPTree());
    if (!clusters)
        addFile(fileName, NULL, usageCount, fileKind, graphOwner);
    else
    {
        ForEachItemIn(c, *clusters)
            ::addFile(files, fileName, clusters->item(c), usageCount, fileKind, graphOwner);
    }
}

void CLocalWorkUnit::releaseFile(const char *fileName)
{
    StringBuffer path("File[@name=\"");
    path.append(fileName).append("\"]");
    CriticalBlock block(crit);
    IPropertyTree *files = p->queryPropTree("Files");
    if (!files) return;
    Owned<IPropertyTreeIterator> fiter = files->getElements(path.str());
    ForEach (*fiter)
    {
        IPropertyTree *file = &fiter->query();
        unsigned usageCount = file->getPropInt("@usageCount");
        if (usageCount > 1)
            file->setPropInt("@usageCount", usageCount-1);
        else
        {
            StringAttr name(file->queryProp("@name"));
            files->removeTree(file);
            if (!name.isEmpty()&&(1 == usageCount))
            {
                if (queryDistributedFileDirectory().removePhysical(fileName, 0, NULL, NULL, queryUserDescriptor()))
                    LOG(MCdebugProgress, unknownJob, "Removed (released) file %s from DFS", name.get());
            }
        }
    }
}

void CLocalWorkUnit::clearGraphProgress()
{
    CConstGraphProgress::deleteWuidProgress(p->queryName());
}

void CLocalWorkUnit::resetBeforeGeneration()
{
    CriticalBlock block(crit);
    //Remove all associated files
    Owned<IWUQuery> q = updateQuery();
    q->removeAssociatedFiles();

    //Remove any pre-existing workflow information
    workflowIterator.clear();
    p->removeProp("Workflow");
}

unsigned CLocalWorkUnit::queryFileUsage(const char *fileName) const
{
    StringBuffer path("Files/File[@name=\"");
    path.append(fileName).append("\"]/@usageCount");
    CriticalBlock block(crit);
    return p->getPropInt(path.str());
}

IPropertyTree *CLocalWorkUnit::getDiskUsageStats()
{
    return p->getPropTree("DiskUsageStats");
}

void CLocalWorkUnit::addDiskUsageStats(__int64 _avgNodeUsage, unsigned _minNode, __int64 _minNodeUsage, unsigned _maxNode, __int64 _maxNodeUsage, __int64 _graphId)
{
    IPropertyTree *stats = p->queryPropTree("DiskUsageStats");
    offset_t maxNodeUsage;
    if (stats)
        maxNodeUsage = stats->getPropInt64("@maxNodeUsage");
    else
    {
        stats = p->addPropTree("DiskUsageStats", createPTree());
        maxNodeUsage = 0;
    }

    if ((offset_t)_maxNodeUsage > maxNodeUsage)
    {
        // record all details at time of max node usage.
        stats->setPropInt("@minNode", _minNode);
        stats->setPropInt("@maxNode", _maxNode);
        stats->setPropInt64("@minNodeUsage", _minNodeUsage);
        stats->setPropInt64("@maxNodeUsage", _maxNodeUsage);
        stats->setPropInt64("@graphId", _graphId);
        if (_avgNodeUsage)
        {
            unsigned _skewHi = (unsigned)((100 * (_maxNodeUsage-_avgNodeUsage))/_avgNodeUsage);
            unsigned _skewLo = (unsigned)((100 * (_avgNodeUsage-_minNodeUsage))/_avgNodeUsage);
            stats->setPropInt("@skewHi", _skewHi);
            stats->setPropInt("@skewLo", _skewLo);
        }
    }
}

IPropertyTreeIterator & CLocalWorkUnit::getFileIterator() const
{
    CriticalBlock block(crit);
    return * p->getElements("Files/File");
}

IPropertyTreeIterator & CLocalWorkUnit::getFilesReadIterator() const
{
    CriticalBlock block(crit);
    return * p->getElements("FilesRead/File");
}

//=================================================================================================

IWUActivity * CLocalWorkUnit::updateActivity(__int64 id)
{
    CriticalBlock block(crit);
    IConstWUActivity *existing = getActivity(id);
    if (existing)
        return (IWUActivity *) existing;
    if (!activities.length())
        p->addPropTree("Activities", createPTree("Activities"));
    IPropertyTree *pl = p->queryPropTree("Activities");
    IPropertyTree *s = pl->addPropTree("Activity", createPTree("Activity"));
    IWUActivity * q = new CLocalWUActivity(LINK(s), id); 
    activities.append(*LINK(q));
    return q;
}

IConstWUActivity * CLocalWorkUnit::getActivity(__int64 id) const
{
    CriticalBlock block(crit);
    loadActivities();
    ForEachItemIn(idx, activities)
    {
        IConstWUActivity &cur = activities.item(idx);
        if (cur.getId() == id)
            return &OLINK(cur);
    }
    return NULL;
}

void CLocalWorkUnit::loadActivities() const
{
    CriticalBlock block(crit);
    if (!activitiesCached)
    {
        assertex(activities.length() == 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Activities/Activity");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            activities.append(*new CLocalWUActivity(rp));
        }
        activitiesCached = true;
    }
}

IConstWUActivityIterator& CLocalWorkUnit::getActivities() const
{
    CriticalBlock block(crit);
    loadActivities();
    return *new CArrayIteratorOf<IConstWUActivity,IConstWUActivityIterator> (activities, 0, (IConstWorkUnit *) this);
}

//=================================================================================================


bool CLocalWorkUnit::switchThorQueue(const char *cluster, IQueueSwitcher *qs)
{
    CriticalBlock block(crit);
    if (qs->isAuto()&&!getAllowAutoQueueSwitch())
        return false;
    Owned<IConstWUClusterInfo> newci = getTargetClusterInfo(cluster);
    if (!newci) 
        return false;
    StringBuffer currentcluster;
    if (!p->getProp("@clusterName",currentcluster))
        return false;
    Owned<IConstWUClusterInfo> curci = getTargetClusterInfo(currentcluster.str());
    if (!curci)
        return false;
    SCMStringBuffer curqname;
    curci->getThorQueue(curqname);
    const char *wuid = p->queryName();
    void *qi = qs->getQ(curqname.str(),wuid);
    if (!qi)
        return false;
    setClusterName(cluster);
    SCMStringBuffer newqname;
    newci->getThorQueue(newqname);
    qs->putQ(newqname.str(),wuid,qi);
    return true;
}


//=================================================================================================

void CLocalWorkUnit::loadGraphs() const
{
    CriticalBlock block(crit);
    if (!cachedGraphs.get())
    {
        MemoryBuffer buf;
        IPropertyTree *t = p->queryPropTree("PackedGraphs");
        if (t&&t->getPropBin(NULL,buf)) {
            cachedGraphs.setown(createPTree(buf));
        }
        else
            cachedGraphs.set(p->queryPropTree("Graphs"));
        if (cachedGraphs.get()) {
            Owned<IPropertyTreeIterator> r = cachedGraphs->getElements("Graph");
            for (r->first(); r->isValid(); r->next())
            {
                IPropertyTree *rp = &r->query();
                rp->Link();

                graphs.append(*new CLocalWUGraph(rp, p->queryName()));
            }

        }
        
    }
}

mapEnums graphTypes[] = {
   { GraphTypeAny, "unknown" },
   { GraphTypeProgress, "progress" },
   { GraphTypeEcl, "ECL" },
   { GraphTypeActivities, "activities" },
   { GraphTypeSubProgress, "subgraph" },
   { GraphTypeSize,  NULL },
};

CLocalWUGraph::CLocalWUGraph(IPropertyTree *props, const char *_wuid) : p(props), wuid(_wuid)
{
}

IStringVal& CLocalWUGraph::getName(IStringVal &str) const
{
    str.set(p->queryProp("@name"));
    return str;
}

IStringVal& CLocalWUGraph::getLabel(IStringVal &str) const
{
    Owned<IPropertyTree> xgmml = getXGMMLTree(false);
    str.set(xgmml->queryProp("@label"));
    return str;
}


IStringVal& CLocalWUGraph::getXGMML(IStringVal &str, bool mergeProgress) const
{
    Owned<IPropertyTree> xgmml = getXGMMLTree(mergeProgress);
    if (xgmml)
    {
        StringBuffer x;
        toXML(xgmml, x);
        str.set(x.str());
    }
    return str;
}

unsigned CLocalWorkUnit::getGraphCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("Graphs"))
    {
        return p->queryPropTree("Graphs")->numChildren();
    }
    return 0;
}

unsigned CLocalWorkUnit::getSourceFileCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("FilesRead"))
    {
        return p->queryPropTree("FilesRead")->numChildren();
    }
    return 0;
    
}

unsigned CLocalWorkUnit::getResultCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("Results"))
    {
        return p->queryPropTree("Results")->numChildren();
    }
    return 0;
    
}

unsigned CLocalWorkUnit::getVariableCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("Variables"))
    {
        return p->queryPropTree("Variables")->numChildren();
    }
    return 0;
    
}

unsigned CLocalWorkUnit::getTimerCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("Timings"))
    {
        return p->queryPropTree("Timings")->numChildren();
    }
    return 0;
    
}

unsigned CLocalWorkUnit::getApplicationValueCount() const
{
    CriticalBlock block(crit);
    if (p->hasProp("Application"))
    {
        return p->queryPropTree("Application")->numChildren();
    }
    return 0;
    
}

IStringVal &CLocalWorkUnit::getXmlParams(IStringVal &str) const
{
    CriticalBlock block(crit);
    IPropertyTree *paramTree = p->queryPropTree("Parameters");
    if (paramTree)
    {
        StringBuffer temp;
        toXML(paramTree, temp);
        str.set(temp.str());
    }
    return str;
}

const IPropertyTree *CLocalWorkUnit::getXmlParams() const
{
    CriticalBlock block(crit);
    return p->getPropTree("Parameters");
}

void CLocalWorkUnit::setXmlParams(const char *params)
{
    CriticalBlock block(crit);
    p->setPropTree("Parameters", createPTreeFromXMLString(params));
}

void CLocalWorkUnit::setXmlParams(IPropertyTree *tree)
{
    CriticalBlock block(crit);
    p->setPropTree("Parameters", tree);
}

unsigned __int64 CLocalWorkUnit::getHash() const
{
    CriticalBlock block(crit);
    return p->getPropInt64("@hash");
}

void CLocalWorkUnit::setHash(unsigned __int64 hash)
{
    CriticalBlock block(crit);
    p->setPropInt64("@hash", hash);
}

IConstWUGraphIterator& CLocalWorkUnit::getGraphs(WUGraphType type) const
{
    CriticalBlock block(crit);
    loadGraphs();
    IConstWUGraphIterator *giter = new CArrayIteratorOf<IConstWUGraph,IConstWUGraphIterator> (graphs, 0, (IConstWorkUnit *) this);
    if (type!=GraphTypeAny) {
        class CConstWUGraphIterator: public CInterface, implements IConstWUGraphIterator
        {
            WUGraphType type;
            Owned<IConstWUGraphIterator> base;
            bool match()
            {
                return  base->query().getType()==type;
            }
        public:
            IMPLEMENT_IINTERFACE;
            CConstWUGraphIterator(IConstWUGraphIterator *_base,WUGraphType _type)   
                : base(_base)
            {
                type = _type;
            }
            bool first()
            {
                if (!base->first())
                    return false;
                if (match())
                    return true;
                return next();
            }
            bool next() 
            {
                while (base->next()) 
                    if (match())
                        return true;
                return false;
            }
            virtual bool isValid()
            {
                return base->isValid();
            }
            IConstWUGraph & query()
            {
                return base->query();
            }
        };
        giter = new CConstWUGraphIterator(giter,type);
    }
    return *giter;
}

IConstWUGraph* CLocalWorkUnit::getGraph(const char *qname) const
{
    CriticalBlock block(crit);
    loadGraphs();
    ForEachItemIn(idx, graphs)
    {
        SCMStringBuffer name;
        IConstWUGraph &cur = graphs.item(idx);
        cur.getName(name);
        if (stricmp(name.str(), qname)==0)
        {
            cur.Link();
            return &cur;
        }
    }
    return NULL;
}

IWUGraph* CLocalWorkUnit::createGraph()
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    ensureGraphsUnpacked();
    loadGraphs();
    if (!graphs.length())
        p->addPropTree("Graphs", createPTree("Graphs"));
    IPropertyTree *r = p->queryPropTree("Graphs");
    IPropertyTree *s = r->addPropTree("Graph", createPTreeFromXMLString("<Graph fetchEntire='1'/>"));
    s->Link();
    IWUGraph* q = new CLocalWUGraph(s, p->queryName());
    q->Link();
    graphs.append(*q);
    return q;
}

IWUGraph * CLocalWorkUnit::updateGraph(const char * name)
{
    CriticalBlock block(crit);
    ensureGraphsUnpacked();
    IConstWUGraph *existing = getGraph(name);
    if (existing)
        return (IWUGraph *) existing;
    IWUGraph * q = createGraph(); 
    q->setName(name);
    return q;
}

IConstWUGraphProgress *CLocalWorkUnit::getGraphProgress(const char *name) const
{
    CriticalBlock block(crit);
    return new CConstGraphProgress(p->queryName(), name);
}

IStringVal& CLocalWUGraph::getDOT(IStringVal &str) const
{
    UNIMPLEMENTED;
}

void CLocalWUGraph::setName(const char *str)
{
    p->setProp("@name", str);
    progress.clear();
    progress.setown(new CConstGraphProgress(wuid, str));
}

void CLocalWUGraph::setXGMML(const char *str)
{
    setXGMMLTree(createPTreeFromXMLString(str));
}

void CLocalWUGraph::setXGMMLTree(IPropertyTree *graph)
{
    assertex(strcmp(graph->queryName(), "graph")==0);
    IPropertyTree *xgmml = createPTree("xgmml");
    xgmml->setPropTree("graph", graph);
    p->setPropTree("xgmml", xgmml);
}

void CLocalWUGraph::mergeProgress(IPropertyTree &rootNode, IPropertyTree &progressTree, const unsigned &progressV) const
{
    IPropertyTree *graphNode = rootNode.queryPropTree("att/graph");
    if (!graphNode) return;
    unsigned nodeId = rootNode.getPropInt("@id");
    StringBuffer progressNodePath("node[@id=\"");
    progressNodePath.append(nodeId).append("\"]");
    IPropertyTree *progressNode = progressTree.queryPropTree(progressNodePath.str());
    if (progressNode)
    {
        Owned<IPropertyTreeIterator> edges = progressNode->getElements("edge");
        ForEach (*edges)
        {
            IPropertyTree &edge = edges->query();
            StringBuffer edgePath("edge[@id=\"");
            edgePath.append(edge.queryProp("@id")).append("\"]");
            IPropertyTree *graphEdge = graphNode->queryPropTree(edgePath.str());
            if (graphEdge)
            {
                if (progressV < 1)
                    mergePTree(graphEdge, &edge);
                else
                { // must translate to XGMML format
                    Owned<IAttributeIterator> aIter = edge.getAttributes();
                    ForEach (*aIter)
                    {
                        const char *aName = aIter->queryName()+1;
                        if (0 != stricmp("id", aName)) // "id" reserved.
                        {
                            IPropertyTree *att = graphEdge->addPropTree("att", createPTree());
                            att->setProp("@name", aName);
                            att->setProp("@value", aIter->queryValue());
                        }
                    }
                    // This is really only here, so that our progress format can use non-attribute values, which have different efficiency qualifies (e.g. can be external by dali)
                    Owned<IPropertyTreeIterator> iter = edge.getElements("*");
                    ForEach (*iter)
                    {
                        IPropertyTree &t = iter->query();
                        IPropertyTree *att = graphEdge->addPropTree("att", createPTree());
                        att->setProp("@name", t.queryName());
                        att->setProp("@value", t.queryProp(NULL));
                    }
                }
            }
        }
        Owned<IPropertyTreeIterator> nodes = progressNode->getElements("node");
        ForEach (*nodes)
        {
            IPropertyTree &node = nodes->query();
            StringBuffer nodePath("node[@id=\"");
            nodePath.append(node.queryProp("@id")).append("\"]");
            IPropertyTree *_node = graphNode->queryPropTree(nodePath.str());
            if (_node)
            {
                if (progressV < 1)
                    mergePTree(_node, &node);
                else
                { // must translate to XGMML format
                    Owned<IAttributeIterator> aIter = node.getAttributes();
                    ForEach (*aIter)
                    {
                        const char *aName = aIter->queryName()+1;
                        if (0 != stricmp("id", aName)) // "id" reserved.
                        {
                            IPropertyTree *att = _node->addPropTree("att", createPTree());
                            att->setProp("@name", aName);
                            att->setProp("@value", aIter->queryValue());
                        }
                    }
                }
            }
        }
    }
    Owned<IPropertyTreeIterator> iter = graphNode->getElements("node");
    ForEach (*iter)
        mergeProgress(iter->query(), progressTree, progressV);
}

IPropertyTree * CLocalWUGraph::getXGMMLTree(bool doMergeProgress) const
{
    if (!doMergeProgress)
        return p->getPropTree("xgmml/graph");
    else
    {
        IPropertyTree *src = p->queryPropTree("xgmml/graph");
        if (!src) return NULL;
        Owned<IPropertyTree> copy = createPTreeFromIPT(src);
        Owned<IConstWUGraphProgress> _progress;
        if (progress) _progress.set(progress);
        else
            _progress.setown(new CConstGraphProgress(wuid, p->queryProp("@name")));

        unsigned progressV = _progress->queryFormatVersion();
        IPropertyTree *progressTree = _progress->queryProgressTree();
        Owned<IPropertyTreeIterator> nodeIterator = copy->getElements("node");
        ForEach (*nodeIterator)
            mergeProgress(nodeIterator->query(), *progressTree, progressV);
        return LINK(copy);
    }
}

bool CLocalWUGraph::isValid() const
{
    return p->hasProp("xgmml/graph/node");
}

WUGraphType CLocalWUGraph::getType() const
{
    return (WUGraphType) getEnum(p, "@type", graphTypes);
}

IStringVal & CLocalWUGraph::getTypeName(IStringVal &str) const
{
    str.set(p->queryProp("@type"));
    if (!str.length())
        str.set("unknown");
    return str;
}

void CLocalWUGraph::setType(WUGraphType _type)
{
    setEnum(p, "@type", _type, graphTypes);
}

//=================================================================================================

mapEnums queryFileTypes[] = {
   { FileTypeCpp, "cpp" },
   { FileTypeDll, "dll" },
   { FileTypeResText, "res" },
   { FileTypeHintXml, "hint" },
   { FileTypeSize,  NULL },
};

CLocalWUAssociated::CLocalWUAssociated(IPropertyTree *props) : p(props)
{
}

WUFileType CLocalWUAssociated::getType() const
{
    return (WUFileType)getEnum(p, "@type", queryFileTypes);
}

IStringVal & CLocalWUAssociated::getDescription(IStringVal & str) const
{
    str.set(p->queryProp("@desc"));
    return str;
}

IStringVal & CLocalWUAssociated::getIp(IStringVal & str) const
{
    str.set(p->queryProp("@ip"));
    return str;
}

IStringVal & CLocalWUAssociated::getName(IStringVal & str) const
{
    str.set(p->queryProp("@filename"));
    return str;
}

IStringVal & CLocalWUAssociated::getNameTail(IStringVal & str) const
{
    str.set(pathTail(p->queryProp("@filename")));
    return str;
}

unsigned CLocalWUAssociated::getCrc() const
{
    return p->getPropInt("@crc", 0);
}



//=================================================================================================

CLocalWUQuery::CLocalWUQuery(IPropertyTree *props) : p(props)
{
    associatedCached = false;
}

mapEnums queryTypes[] = {
   { QueryTypeUnknown, "unknown" },
   { QueryTypeEcl, "ECL" },
   { QueryTypeSql, "SQL" },
   { QueryTypeXml, "XML" },
   { QueryTypeAttribute, "Attribute" },
   { QueryTypeSize,  NULL },
};

WUQueryType CLocalWUQuery::getQueryType() const
{
    return (WUQueryType) getEnum(p, "@type", queryTypes);
}

void CLocalWUQuery::setQueryType(WUQueryType qt) 
{
    setEnum(p, "@type", qt, queryTypes);
}

IStringVal& CLocalWUQuery::getQueryText(IStringVal &str) const
{
    str.set(p->queryProp("Text"));
    return str;
}

IStringVal& CLocalWUQuery::getQueryShortText(IStringVal &str) const
{
    const char * text = p->queryProp("Text");
    if (isArchiveQuery(text))
    {
        Owned<IPropertyTree> xml = createPTreeFromXMLString(text, ipt_caseInsensitive);
        const char * path = xml->queryProp("Query/@attributePath");
        if (path)
        {
            IPropertyTree * resolved = resolveDefinitionInArchive(xml, path);
            if (resolved)
                str.set(resolved->queryProp(NULL));
        }
        else
            str.set(xml->queryProp("Query"));
    }
    else
        str.set(text);
    return str;
}

IStringVal& CLocalWUQuery::getQueryName(IStringVal &str) const
{
    str.set(p->queryProp("@name"));
    return str;
}

IStringVal & CLocalWUQuery::getQueryMainDefinition(IStringVal & str) const
{
    str.set(p->queryProp("@main"));
    return str;
}

IStringVal& CLocalWUQuery::getQueryDllName(IStringVal &str) const
{
    Owned<IConstWUAssociatedFile> entry = getAssociatedFile(FileTypeDll, 0);
    if (entry)
        entry->getNameTail(str);
    return str;
}

IStringVal& CLocalWUQuery::getQueryCppName(IStringVal &str) const
{
    Owned<IConstWUAssociatedFile> entry = getAssociatedFile(FileTypeCpp, 0);
    if (entry)
        entry->getName(str);
    return str;
}

IStringVal& CLocalWUQuery::getQueryResTxtName(IStringVal &str) const
{
    Owned<IConstWUAssociatedFile> entry = getAssociatedFile(FileTypeResText, 0);
    if (entry)
        entry->getName(str);
    return str;
}

unsigned CLocalWUQuery::getQueryDllCrc() const
{
    Owned<IConstWUAssociatedFile> entry = getAssociatedFile(FileTypeDll, 0);
    if (entry)
        return entry->getCrc();
    return 0;
}

void CLocalWUQuery::setQueryText(const char *text)
{
    p->setProp("Text", text);
}

void CLocalWUQuery::setQueryName(const char *qname)
{
    p->setProp("@name", qname);
}

void CLocalWUQuery::setQueryMainDefinition(const char * str)
{
    p->setProp("@main", str);
}

void CLocalWUQuery::addAssociatedFile(WUFileType type, const char * name, const char * ip, const char * desc, unsigned crc)
{
    CriticalBlock block(crit);
    loadAssociated();
    if (!associated.length())
        p->addPropTree("Associated", createPTree("Associated"));
    IPropertyTree *pl = p->queryPropTree("Associated");
    IPropertyTree *s = pl->addPropTree("File", createPTree("File"));
    setEnum(s, "@type", type, queryFileTypes);
    s->setProp("@filename", name);
    s->setProp("@ip", ip);
    s->setProp("@desc", desc);

    if (crc)
        s->setPropInt("@crc", crc);
    IConstWUAssociatedFile * q = new CLocalWUAssociated(LINK(s)); 
    associated.append(*q);
}

void CLocalWUQuery::removeAssociatedFiles()
{
    associatedCached = false;
    associated.kill();
    p->removeProp("Associated");
}


IConstWUAssociatedFile * CLocalWUQuery::getAssociatedFile(WUFileType type, unsigned index) const
{
    CriticalBlock block(crit);
    loadAssociated();
    ForEachItemIn(idx, associated)
    {
        CLocalWUAssociated &cur = static_cast<CLocalWUAssociated &>(associated.item(idx));
        if (cur.getType() == type)
        {
            if (index-- == 0)
                return &OLINK(cur);
        }
    }
    return NULL;
}

void CLocalWUQuery::addSpecialCaseAssociated(WUFileType type, const char * propname, unsigned crc) const
{
    const char * name = p->queryProp(propname);
    if (name)
    {
        IPropertyTree *s = createPTree("File");
        setEnum(s, "@type", type, queryFileTypes);
        s->setProp("@filename", name);
        if (crc)
            s->setPropInt("@crc", crc);
        associated.append(*new CLocalWUAssociated(s));
    }
}

void CLocalWUQuery::loadAssociated() const
{
    CriticalBlock block(crit);
    if (!associatedCached)
    {
        assertex(associated.length() == 0);
        addSpecialCaseAssociated(FileTypeDll, "DllName", p->getPropInt("DllCrc", 0));
        addSpecialCaseAssociated(FileTypeCpp, "CppName", 0);
        addSpecialCaseAssociated(FileTypeResText, "ResTxtName", 0);
        Owned<IPropertyTreeIterator> r = p->getElements("Associated/File");
        for (r->first(); r->isValid(); r->next())
        {
            IPropertyTree *rp = &r->query();
            rp->Link();
            associated.append(*new CLocalWUAssociated(rp));
        }
        associatedCached = true;
    }
}

IConstWUAssociatedFileIterator& CLocalWUQuery::getAssociatedFiles() const
{
    CriticalBlock block(crit);
    loadAssociated();
    return *new CArrayIteratorOf<IConstWUAssociatedFile,IConstWUAssociatedFileIterator> (associated, 0, (IConstWUQuery *) this);
}

//========================================================================================

CLocalWUWebServicesInfo::CLocalWUWebServicesInfo(IPropertyTree *props) : p(props)
{
}

IStringVal& CLocalWUWebServicesInfo::getModuleName(IStringVal &str) const
{
    str.set(p->queryProp("@module"));
    return str;
}

IStringVal& CLocalWUWebServicesInfo::getAttributeName(IStringVal &str) const
{
    str.set(p->queryProp("@attribute"));
    return str;
}

IStringVal& CLocalWUWebServicesInfo::getDefaultName(IStringVal &str) const
{
    str.set(p->queryProp("@defaultName"));
    return str;
}

unsigned CLocalWUWebServicesInfo::getWebServicesCRC() const
{
    return (unsigned) p->getPropInt("@crc");
}

IStringVal& CLocalWUWebServicesInfo::getInfo(const char *name, IStringVal &str) const
{
    if (!name)
    {
        StringBuffer ws_info;
        ws_info.appendf("<%s ", p->queryName());
        Owned<IAttributeIterator> attrs = p->getAttributes();
        for(attrs->first(); attrs->isValid(); attrs->next())
        {
            const char *name = attrs->queryName()+1;
            const char *value = attrs->queryValue();
            ws_info.appendf("%s='%s' ", name, value);
        }
        ws_info.append("> \n");

        Owned<IPropertyTreeIterator> info = p->getElements("*");
        ForEach(*info)
        {
            IPropertyTree &item = info->query();
            const char *name = item.queryName();
            if (name)
            {
                MemoryBuffer mb;
                bool isbin = p->isBinary(name);
                if (isbin)
                {
                    p->getPropBin(name,mb);

                    if (mb.length())
                    {
                        unsigned len = 0;
                        mb.read(len);
                        StringBuffer encodedString;
                        StringBuffer val(len, (const char *) mb.readDirect(len));
                        encodeXML(val, encodedString);
                        ws_info.appendf("<%s>%s</%s>", name, encodedString.str(), name);
                    }
                }
                else
                {
                    StringBuffer tmp;
                    toXML(&item, tmp);
                    ws_info.append(tmp.str());
                }
            }
        }
        ws_info.appendf("</%s>", p->queryName());
        str.setLen(ws_info.str(), ws_info.length());
    }
    else
    {
        MemoryBuffer mb;
        p->getPropBin(name,mb);

        if (mb.length())
        {
            unsigned len;
            mb.read(len);
            str.setLen((const char *) mb.readDirect(len), len);
        }
    }

    return str;

}


void CLocalWUWebServicesInfo::setModuleName(const char *mname)
{
    p->setProp("@module", mname);
}

void CLocalWUWebServicesInfo::setAttributeName(const char *aname)
{
    p->setProp("@attribute", aname);
}

void CLocalWUWebServicesInfo::setDefaultName(const char *dname)
{
    p->setProp("@defaultName", dname);
}

void CLocalWUWebServicesInfo::setWebServicesCRC(unsigned crc)
{
    p->setPropInt("@crc", crc);
}

void CLocalWUWebServicesInfo::setInfo(const char *name, const char *info)
{
    MemoryBuffer m;
    unsigned len = (size32_t)strlen(info);
    serializeLPString(len, info, m);
    p->setPropBin(name, m.length(), m.toByteArray());
}


//========================================================================================

CLocalWURoxieQueryInfo::CLocalWURoxieQueryInfo(IPropertyTree *props) : p(props)
{
}

IStringVal& CLocalWURoxieQueryInfo::getQueryInfo(IStringVal &str) const
{
    IPropertyTree *queryTree = p->queryPropTree("query");
    if (queryTree)
    {
        StringBuffer temp;
        toXML(queryTree, temp);
        str.set(temp.str());
    }

    return str;
}

IStringVal& CLocalWURoxieQueryInfo::getDefaultPackageInfo(IStringVal &str) const
{
    MemoryBuffer mb;
    p->getPropBin("RoxiePackages",mb);

    if (mb.length())
    {
        unsigned len;
        mb.read(len);
        str.setLen((const char *) mb.readDirect(len), len);
    }

    return str;
}

IStringVal& CLocalWURoxieQueryInfo::getRoxieClusterName(IStringVal &str) const
{
    const char *val = p->queryProp("@roxieClusterName");
    if (val)
        str.set(val);
    
    return str;
}

IStringVal& CLocalWURoxieQueryInfo::getWuid(IStringVal &str) const
{
    const char *val = p->queryProp("@wuid");
    if (val)
        str.set(val);

    return str;
}


void CLocalWURoxieQueryInfo::setQueryInfo(const char *info)
{
    IPropertyTree *queryTree = p->queryPropTree("query");
    if (queryTree)
        p->removeTree(queryTree);

    IPropertyTree * tempTree = p->addPropTree("query", createPTreeFromXMLString(info));

    if (!p->hasProp("@roxieClusterName"))
    {
        const char *roxieClusterName = tempTree->queryProp("@roxieName");
        if (roxieClusterName && *roxieClusterName)
            p->addProp("@roxieClusterName", roxieClusterName);
    }

    if (!p->hasProp("@wuid"))
    {
        const char *wuid = tempTree->queryProp("Query/@wuid");
        if (wuid && *wuid)
            p->addProp("@wuid", wuid);
    }

}

void CLocalWURoxieQueryInfo::setDefaultPackageInfo(const char *info, int len)
{
    MemoryBuffer m;
    serializeLPString(len, info, m);
    p->setPropBin("RoxiePackages", m.length(), m.toByteArray());
}

void CLocalWURoxieQueryInfo::setRoxieClusterName(const char *info)
{
    p->setProp("@roxieClusterName", info);
}

void CLocalWURoxieQueryInfo::setWuid(const char *info)
{
    p->setProp("@wuid", info);
}


//========================================================================================

CLocalWUResult::CLocalWUResult(IPropertyTree *props) : p(props)
{
}

mapEnums resultStatuses[] = {
   { ResultStatusUndefined, "undefined" },
   { ResultStatusCalculated, "calculated" },
   { ResultStatusSupplied, "supplied" },
   { ResultStatusFailed, "failed" },
   { ResultStatusPartial, "partial" },
   { ResultStatusSize, NULL }
};

WUResultStatus CLocalWUResult::getResultStatus() const
{
    return (WUResultStatus ) getEnum(p, "@status", resultStatuses);
}

IStringVal& CLocalWUResult::getResultName(IStringVal &str) const
{
    str.set(p->queryProp("@name"));
    return str;
}

int CLocalWUResult::getResultSequence() const
{
    return p->getPropInt("@sequence", -1);
}

bool CLocalWUResult::isResultScalar() const
{
    return p->getPropInt("@isScalar", 1) != 0;
}

bool findSize(int size, IntArray &sizes)
{
    ForEachItemIn(idx, sizes)
    {
        if (sizes.item(idx)==size)
            return true;
    }
    return false;
}

void CLocalWUResult::getSchema(TypeInfoArray &types, StringAttrArray &names, IStringVal * eclText) const
{
    MemoryBuffer schema;
    p->getPropBin("SchemaRaw", schema);
    if (schema.length())
    {
        for (;;)
        {
            StringAttr name;
            schema.read(name);
            if (*schema.readDirect(0)==type_void)
                break;
            names.append(*new StringAttrItem(name));
            types.append(*deserializeType(schema));  // MORE - nested records!
        }
        schema.skip(1);

        if (schema.length() != schema.getPos())
        {
            unsigned eclLen;
            schema.read(eclLen);
            const char * schemaData = (const char *)schema.readDirect(eclLen);
            if (eclText)
            {
                eclText->setLen(schemaData, eclLen);
                if ((eclLen == 0) && names.ordinality())
                {
                    const char * firstName = names.item(0).text;

                    StringBuffer temp;
                    temp.append("RECORD ");
                    types.item(0).getECLType(temp);
                    temp.append(" value{NAMED('").append(firstName).append("')}").append("; END;");
                    eclText->set(temp.str());
                }
            }
        }
    }
}

void readRow(StringBuffer &out, MemoryBuffer &in, TypeInfoArray &types, StringAttrArray &names)
{
    ForEachItemIn(idx, types)
    {
        StringAttrItem &name = names.item(idx);
        ITypeInfo &type = types.item(idx);
        unsigned size = type.getSize();
        switch(type.getTypeCode())
        {
        case type_data:
            if (size==UNKNOWN_LENGTH)
            {
                if (in.remaining() < sizeof(int))
                    throw MakeStringException(WUERR_CorruptResult, "corrupt workunit information");
                in.read(size);
            }
            outputXmlData(size, in.readDirect(size), name.text, out);
            break;
        case type_string:
            if (size==UNKNOWN_LENGTH)
            {
                if (in.remaining() < sizeof(int))
                    throw MakeStringException(WUERR_CorruptResult, "corrupt workunit information");
                in.read(size);
            }
            outputXmlString(size, (const char *) in.readDirect(size), name.text, out);
            break;
        case type_varstring:
            {
                if (size == UNKNOWN_LENGTH)
                    size = (size32_t)strlen((const char *) in.readDirect(0))+1;
                const char * text = (const char *) in.readDirect(size);
                outputXmlString((size32_t)strlen(text), text, name.text, out);
                break;
            }
        case type_unicode:
            {
                unsigned len = type.getStringLen();
                if (size==UNKNOWN_LENGTH)
                    in.read(len);
                outputXmlUnicode(len, (UChar const *) in.readDirect(len*2), name.text, out);
            }
            break;
        case type_utf8:
            {
                unsigned len = type.getStringLen();
                if (size==UNKNOWN_LENGTH)
                {
                    in.read(len);
                    size = rtlUtf8Size(len, in.readDirect(0));
                }
                outputXmlUtf8(len, (const char *) in.readDirect(size), name.text, out);
            }
            break;
        case type_qstring:
            {
                unsigned len = type.getStringLen();
                if (size==UNKNOWN_LENGTH)
                    in.read(len);
                unsigned outlen;
                char *outstr;
                rtlQStrToStrX(outlen, outstr, len, (const char *) in.readDirect(rtlQStrSize(len)));
                outputXmlString(outlen, outstr, name.text, out);
                free(outstr);
                break;
            }
        case type_int: 
        case type_swapint: 
            if (type.isSigned())
            {
                const unsigned char *raw = (const unsigned char *) in.readDirect(size);
                unsigned __int64 cval8 = 0;
                //MORE: I think this is wrong - swapped doesn't mean little/big/
                if (type.isSwappedEndian())
                {
                    unsigned idx = 0;
                    if (raw[idx] & 0x80)
                        cval8 = (__int64)-1;
                    while (size--)
                        cval8 = (cval8 << 8) | raw[idx++];
                }
                else
                {
                    if (raw[size-1] & 0x80)
                        cval8 = (__int64)-1;
                    while (size--)
                        cval8 = (cval8 << 8) | raw[size];
                }
                outputXmlInt((__int64) cval8, name.text, out);
            }
            else
            {
                const unsigned char *raw = (const unsigned char *) in.readDirect(size);
                unsigned __int64 cval8 = 0;
                if (type.isSwappedEndian())
                {
                    unsigned idx = 0;
                    while (size--)
                        cval8 = (cval8 << 8) | raw[idx++];
                }
                else
                {
                    while (size--)
                        cval8 = (cval8 << 8) | raw[size];
                }
                outputXmlUInt(cval8, name.text, out);
            }
            break;
        case type_boolean:
            bool cvalb;
            in.read(cvalb);
            outputXmlBool(cvalb, name.text, out);
            break;
        case type_decimal:
            if (type.isSigned())
                outputXmlDecimal(in.readDirect(size), size, type.getPrecision(), name.text, out);
            else
                outputXmlUDecimal(in.readDirect(size), size, type.getPrecision(), name.text, out);
            break;
        case type_real:
            double cvald;
            switch(size)
            {
            case 4:
                float cvalf;
                in.read(cvalf);
                cvald = cvalf;
                break;
            case 8:
                in.read(cvald);
                break;
            }
            outputXmlReal(cvald, name.text, out);
            break;
        default:
            assertex(!"unexpected type in raw record");
            break;
        }
    }
}

IStringVal& CLocalWUResult::getResultXml(IStringVal &str) const
{
    TypeInfoArray types;
    StringAttrArray names;
    getSchema(types, names);

    StringBuffer xml;
    MemoryBuffer raw;
    p->getPropBin("Value", raw);
    const char * name = p->queryProp("@name");
    if (name)
        xml.appendf("<Dataset name=\'%s\'>\n", name);
    else
        xml.append("<Dataset>\n");

    unsigned __int64 numrows = getResultRowCount();
    while (numrows--)
    {
        xml.append(" <Row>");
        readRow(xml, raw, types, names);
        xml.append("</Row>\n");
    }
    xml.append("</Dataset>\n");
    str.set(xml.str());
    return str;
}

unsigned CLocalWUResult::getResultFetchSize() const
{
    return p->getPropInt("fetchSize", 100);
}

__int64 CLocalWUResult::getResultTotalRowCount() const
{
    return p->getPropInt64("totalRowCount", -1);
}

__int64 CLocalWUResult::getResultRowCount() const
{
    return p->getPropInt64("rowCount", 0);
}

void CLocalWUResult::getResultDataset(IStringVal & ecl, IStringVal & defs) const
{
    ecl.set(p->queryProp("datasetEcl"));
    defs.set(p->queryProp("datasetEclDefs"));
}

IStringVal& CLocalWUResult::getResultLogicalName(IStringVal & val) const
{
    val.set(p->queryProp("logicalName"));
    return val;
}

IStringVal& CLocalWUResult::getResultKeyField(IStringVal & ecl) const
{
    ecl.set(p->queryProp("keyField"));
    return ecl;
}

unsigned CLocalWUResult::getResultRequestedRows() const
{
    return p->getPropInt("requestedRows", 1);
}

IStringVal& CLocalWUResult::getResultEclSchema(IStringVal & str) const
{
    TypeInfoArray types;
    StringAttrArray names;
    getSchema(types, names, &str);
    return str;
}

IStringVal& CLocalWUResult::getResultRecordSizeEntry(IStringVal & str) const
{
    str.set(p->queryProp("@recordSizeEntry"));
    return str;
}

IStringVal& CLocalWUResult::getResultTransformerEntry(IStringVal & str) const
{
    str.set(p->queryProp("@transformerEntry"));
    return str;
}

__int64 CLocalWUResult::getResultRowLimit() const
{
    return p->getPropInt64("@rowLimit");
}

IStringVal& CLocalWUResult::getResultFilename(IStringVal & str) const
{
    str.set(p->queryProp("@tempFilename"));
    return str;
}

void CLocalWUResult::setResultStatus(WUResultStatus status)
{
    setEnum(p, "@status", status, resultStatuses);
    if (status==ResultStatusUndefined)
        p->removeProp("Value");
}

void CLocalWUResult::setResultName(const char *s)
{
    p->setProp("@name", s);
}
void CLocalWUResult::setResultSequence(unsigned seq)
{
    p->setPropInt("@sequence", seq);
}
void CLocalWUResult::setResultSchemaRaw(unsigned size, const void *schema)
{
    p->setPropBin("SchemaRaw", size, schema);
}
void CLocalWUResult::setResultScalar(bool isScalar)
{
    p->setPropInt("@isScalar", (int) isScalar);
    if (isScalar)
        setResultTotalRowCount(1);
}
void CLocalWUResult::setResultRaw(unsigned len, const void *data, WUResultFormat format)
{
    p->setPropBin("Value", len, data);
    setResultStatus(ResultStatusSupplied);
    setResultFormat(format);
}

void CLocalWUResult::setResultFormat(WUResultFormat format)
{
    switch (format)
    {
    case ResultFormatXml: 
        p->setProp("@format","xml"); 
        break;
    case ResultFormatXmlSet: 
        p->setProp("@format","xmlSet"); 
        break;
    case ResultFormatCsv: 
        p->setProp("@format","csv"); 
        break;
    default:
        p->removeProp("@format");
        break;
    }
}

void CLocalWUResult::setResultXML(const char *val)
{
    p->setProp("xmlValue", val);
}

void CLocalWUResult::addResultRaw(unsigned len, const void *data, WUResultFormat format)
{
    p->appendPropBin("Value", len, data);
    setResultStatus(ResultStatusPartial);
    const char *existingFormat = p->queryProp("@format");
    const char *formatStr = NULL;
    switch (format)
    {
    case ResultFormatXml: 
        formatStr = "xml"; 
        break;
    case ResultFormatXmlSet: 
        formatStr = "xmlSet";
        break;
    case ResultFormatCsv: 
        formatStr = "csv";
        break;
    default:
        p->removeProp("@format");
        break;
    }
    if (format)
    {
        if (existingFormat)
        {
            if (0 != stricmp(formatStr, existingFormat))
                throw MakeStringException(WUERR_ResultFormatMismatch, "addResult format %s, does not match existing format %s", formatStr, existingFormat);
        }
        else
            p->setProp("@format", formatStr);

    }
}

void CLocalWUResult::setResultFetchSize(unsigned rows)
{
    p->setPropInt("fetchSize", rows);
}

void CLocalWUResult::setResultTotalRowCount(__int64 rows)
{
    p->setPropInt64("totalRowCount", rows);
}

void CLocalWUResult::setResultRowCount(__int64 rows)
{
    p->setPropInt64("rowCount", rows);
}

void CLocalWUResult::setResultDataset(const char *ecl, const char *defs)
{
    p->setProp("datasetEcl", ecl);
    p->setProp("datasetEclDefs", defs);
}

void CLocalWUResult::setResultLogicalName(const char *logicalName)
{
    p->setProp("logicalName", logicalName);
}

void CLocalWUResult::setResultKeyField(const char *ecl)
{
    p->setProp("keyField", ecl);
}

void CLocalWUResult::setResultRequestedRows(unsigned rows)
{
    p->setPropInt("requestedRows", rows);
}

void CLocalWUResult::setResultRecordSizeEntry(const char * entry)
{
    p->setProp("@recordSizeEntry", entry);
}

void CLocalWUResult::setResultTransformerEntry(const char * entry)
{
    p->setProp("@transformerEntry", entry);
}


void CLocalWUResult::setResultRowLimit(__int64 value)
{
    p->setPropInt64("@rowLimit", value);
}

void CLocalWUResult::setResultFilename(const char * name)
{
    p->setProp("@tempFilename", name);
}

// MORE - it's an undetected error if we call getResult... of a type that does not match schema

__int64 CLocalWUResult::getResultInt() const
{
    __int64 result = 0;
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
        s.read(result);
    else
        result = p->getPropInt64("xmlValue");
    return result;
}

bool CLocalWUResult::getResultBool() const
{
    bool result = false;
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
        s.read(result);
    else
        result = p->getPropBool("xmlValue");
    return result;
}

double CLocalWUResult::getResultReal() const
{
    double result = 0;
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
        s.read(result);
    else
    {
        const char *xmlVal = p->queryProp("xmlValue");
        if (xmlVal)
            result = atof(xmlVal);
    }
    return result;
}

void CLocalWUResult::getResultDecimal(void * val, unsigned len, unsigned precision, bool isSigned) const
{
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
    {
        assertex(s.length() == len);
        s.read(len, val);
    }
    else
    {
        const char *xmlVal = p->queryProp("xmlValue");
        if (xmlVal)
        {
            TempDecimal d;
            d.setString(strlen(xmlVal), xmlVal);
            if (isSigned)
                d.getDecimal(len, precision, val);
            else
                d.getUDecimal(len, precision, val);
        }
        else
            memset(val, 0, len);
    }
}

IStringVal& CLocalWUResult::getResultString(IStringVal & str) const
{
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
    {
        unsigned len;
        s.read(len);
        str.setLen((const char *) s.readDirect(len), len);
    }
    else
    {
        p->getPropBin("xmlValue", s);
        if (p->isBinary("xmlValue"))
            str.setLen(s.toByteArray(), s.length());
        else
        {
            char *ascii = rtlUtf8ToVStr(rtlUtf8Length(s.length(), s.toByteArray()), s.toByteArray());
            str.set(ascii);
            rtlFree(ascii);
        }
    }
    return str;
}


WUResultFormat CLocalWUResult::getResultFormat() const
{
    const char * format = p->queryProp("@format");
    if (!format)
        return ResultFormatRaw;
    else if (strcmp(format, "xml") == 0)
        return ResultFormatXml;
    else if (strcmp(format, "xmlSet") == 0)
        return ResultFormatXmlSet;
    else if (strcmp(format, "csv") == 0)
        return ResultFormatCsv;
    else
        throw MakeStringException(WUERR_InvalidResultFormat, "Unrecognised result format %s", format);
}

IDataVal& CLocalWUResult::getResultRaw(IDataVal & data, IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const
{
    MemoryBuffer s;
    p->getPropBin("Value", s);
    unsigned len = s.length();
    if (len)
    {
        WUResultFormat format = getResultFormat();
        if (format == ResultFormatXml || format == ResultFormatXmlSet)
        {
            if (!xmlTransformer)
                throw MakeStringException(WUERR_MissingFormatTranslator, "No transformer supplied to translate XML format result");
            xmlTransformer->transform(data, len, s.readDirect(len), format == ResultFormatXml);
        }
        else if (format == ResultFormatCsv)
        {
            if (!csvTransformer)
                throw MakeStringException(WUERR_MissingFormatTranslator, "No transformer supplied to translate Csv format result");
            csvTransformer->transform(data, len, s.readDirect(len), true);
        }
        else
            data.setLen(s.readDirect(len), len);
    }
    else
        data.clear();
    return data;
}

unsigned CLocalWUResult::getResultHash() const
{
    MemoryBuffer s;
    p->getPropBin("Value", s);
    unsigned len = s.length();
    const byte * data = (const byte *)s.toByteArray();
    return ~hashc(data, len, ~0);
}


IDataVal& CLocalWUResult::getResultUnicode(IDataVal & data) const
{
    MemoryBuffer s;
    p->getPropBin("Value", s);
    if (s.length())
    {
        unsigned len;
        s.read(len);
        data.setLen(s.readDirect(len*2), len*2);
    }
    else
    {
        StringBuffer utf8;
        if (p->getProp("xmlValue", utf8))
        {
            unsigned outlen;
            UChar *out;
            rtlUtf8ToUnicodeX(outlen, out, utf8.length(), utf8.str());
            data.setLen(out, outlen*2);
            rtlFree(out);
        }
        else
            data.clear();
    }
    return data;
}

__int64 CLocalWUResult::getResultRawSize(IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const
{
    WUResultFormat format = getResultFormat();
    if (format == ResultFormatRaw)
    {
        //MORE: This should not load the whole property...
        MemoryBuffer s;
        p->getPropBin("Value", s);
        return s.length();
    }
    else
    {
        MemoryBuffer temp;
        MemoryBuffer2IDataVal adaptor(temp);
        getResultRaw(adaptor, xmlTransformer, csvTransformer);
        return temp.length();
    }
}

IDataVal& CLocalWUResult::getResultRaw(IDataVal & data, __int64 from, __int64 length, IXmlToRawTransformer * xmlTransformer, ICsvToRawTransformer * csvTransformer) const
{
    WUResultFormat format = getResultFormat();
    if (format != ResultFormatRaw)
    {
        MemoryBuffer temp;
        MemoryBuffer2IDataVal adaptor(temp);
        getResultRaw(adaptor, xmlTransformer, csvTransformer);

        unsigned len = temp.length();
        if (from > len) from = len;
        if (from + length > len) length = len - from;
        data.setLen(temp.readDirect(len) + from, (size32_t)length);
        return data;
    }
    else
    {
        //MORE: This should not load the whole property, and should be different from the code above...
        MemoryBuffer s;
        p->getPropBin("Value", s);
        unsigned len = s.length();
        if (from > len) from = len;
        if (from + length > len) length = len - from;
        data.setLen(s.readDirect(len) + from, (size32_t)length);
        return data;
    }
}

bool CLocalWUResult::getResultIsAll() const
{
    return p->getPropBool("@isAll", false);
}

// MORE - it's an undetected error if we call setResult... of a type that does not match schema

void CLocalWUResult::setResultInt(__int64 val)
{
    // Note: we always serialize scalar integer results as int8, and schema must reflect this
    MemoryBuffer m;
    serializeInt8(val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultUInt(unsigned __int64 val)
{
    setResultInt((__int64) val);
}

void CLocalWUResult::setResultReal(double val)
{
    // Note: we always serialize scalar real results as real8, and schema must reflect this
    MemoryBuffer m;
    serializeReal8(val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultBool(bool val)
{
    MemoryBuffer m;
    serializeBool(val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultString(const char *val, unsigned len)
{
    // Note: we always serialize scalar strings with length prefix, and schema must reflect this
    MemoryBuffer m;
    serializeLPString(len, val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultUnicode(const void *val, unsigned len)
{
    // Note: we always serialize scalar strings with length prefix, and schema must reflect this
    MemoryBuffer m;
    m.append(len).append(len*2, val);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultData(const void *val, unsigned len)
{
    // Note: we always serialize scalar data with length prefix, and schema must reflect this
    MemoryBuffer m;
    serializeLPString(len, (const char *)val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultDecimal(const void *val, unsigned len)
{
    // Note: serialized as data but with length known from schema
    MemoryBuffer m;
    serializeFixedData(len, val, m);
    p->setPropBin("Value", m.length(), m.toByteArray());
    setResultRowCount(1);
    setResultTotalRowCount(1);
}

void CLocalWUResult::setResultIsAll(bool value)
{
    p->setPropBool("@isAll", value);
}

//==========================================================================================

CLocalWUPlugin::CLocalWUPlugin(IPropertyTree *props) : p(props)
{
}

IStringVal& CLocalWUPlugin::getPluginName(IStringVal &str) const
{
    str.set(p->queryProp("@dllname"));
    return str;
}

IStringVal& CLocalWUPlugin::getPluginVersion(IStringVal &str) const
{
    str.set(p->queryProp("@version"));
    return str;
}

bool CLocalWUPlugin::getPluginThor() const
{
    return p->getPropInt("@thor") != 0;
}

bool CLocalWUPlugin::getPluginHole() const
{
    return p->getPropInt("@hole") != 0;
}

void CLocalWUPlugin::setPluginName(const char *str)
{
    p->setProp("@dllname", str);
}

void CLocalWUPlugin::setPluginVersion(const char *str)
{
    p->setProp("@version", str);
}

void CLocalWUPlugin::setPluginThor(bool on)
{
    p->setPropInt("@thor", (int) on);
}

void CLocalWUPlugin::setPluginHole(bool on)
{
    p->setPropInt("@hole", (int) on);
}

//==========================================================================================

class WULibraryActivityIterator : public CInterface, implements IConstWULibraryActivityIterator
{
public:
    WULibraryActivityIterator(IPropertyTree * tree) { iter.setown(tree->getElements("activity")); }
    IMPLEMENT_IINTERFACE;
    bool                first() { return iter->first(); }
    bool                isValid() { return iter->isValid(); }
    bool                next() { return iter->next(); }
    unsigned            query() const { return iter->query().getPropInt("@id"); }
private:
    Owned<IPropertyTreeIterator> iter;
};

CLocalWULibrary::CLocalWULibrary(IPropertyTree *props) : p(props)
{
}

IStringVal& CLocalWULibrary::getName(IStringVal &str) const
{
    str.set(p->queryProp("@name"));
    return str;
}

IConstWULibraryActivityIterator * CLocalWULibrary::getActivities() const 
{ 
    return new WULibraryActivityIterator(p); 
}

void CLocalWULibrary::setName(const char *str)
{
    p->setProp("@name", str);
}

void CLocalWULibrary::addActivity(unsigned id)
{
    StringBuffer s;
    s.append("activity[@id=\"").append(id).append("\"]");
    if (!p->hasProp(s.str()))
        p->addPropTree("activity", createPTree())->setPropInt("@id", id);
}

//==========================================================================================

CLocalWUActivity::CLocalWUActivity(IPropertyTree *props, __int64 id) : p(props)
{
    if (id)
        p->setPropInt64("@id", id);
}

__int64 CLocalWUActivity::getId() const
{
    return p->getPropInt64("@id");
}

unsigned CLocalWUActivity::getKind() const
{
    return (unsigned)p->getPropInt("@kind");
}

IStringVal & CLocalWUActivity::getHelper(IStringVal & str) const
{
    str.set(p->queryProp("@helper"));
    return str;
}


void CLocalWUActivity::setKind(unsigned kind)
{
    p->setPropInt64("@kind", kind);
}

void CLocalWUActivity::setHelper(const char * str)
{
    p->setProp("@helper", str);
}

//==========================================================================================

CLocalWUException::CLocalWUException(IPropertyTree *props) : p(props)
{
}

IStringVal& CLocalWUException::getExceptionSource(IStringVal &str) const
{
    str.set(p->queryProp("@source"));
    return str;
}

IStringVal& CLocalWUException::getExceptionMessage(IStringVal &str) const
{
    str.set(p->queryProp(NULL));
    return str;
}

unsigned  CLocalWUException::getExceptionCode() const
{
    return p->getPropInt("@code", 0);
}

WUExceptionSeverity CLocalWUException::getSeverity() const
{
    return (WUExceptionSeverity)p->getPropInt("@severity", ExceptionSeverityError);
}

IStringVal & CLocalWUException::getTimeStamp(IStringVal & dt) const
{
    dt.set(p->queryProp("@time"));
    return dt;
}

IStringVal & CLocalWUException::getExceptionFileName(IStringVal & str) const
{
    str.set(p->queryProp("@filename"));
    return str;
}

unsigned CLocalWUException::getExceptionLineNo() const
{
    return p->getPropInt("@row", 0);
}

unsigned CLocalWUException::getExceptionColumn() const
{
    return p->getPropInt("@col", 0);
}

void CLocalWUException::setExceptionSource(const char *str)
{
    p->setProp("@source", str);
}

void CLocalWUException::setExceptionMessage(const char *str)
{
    p->setProp(NULL, str);
}

void CLocalWUException::setExceptionCode(unsigned code)
{
    p->setPropInt("@code", code);
}

void CLocalWUException::setSeverity(WUExceptionSeverity level)
{
    p->setPropInt("@severity", level);
}

void CLocalWUException::setTimeStamp(const char *str)
{
    p->setProp("@time", str);
}

void CLocalWUException::setExceptionFileName(const char *str)
{
    p->setProp("@filename", str);
}

void CLocalWUException::setExceptionLineNo(unsigned r)
{
    p->setPropInt("@row", r);
}

void CLocalWUException::setExceptionColumn(unsigned c)
{
    p->setPropInt("@col", c);
}

CLocalWUTimeStamp::CLocalWUTimeStamp(IPropertyTree *props) : p(props)
{
}

IStringVal & CLocalWUTimeStamp::getApplication(IStringVal & str) const
{
    str.set(p->queryProp("@application"));
    return str;
}

IStringVal & CLocalWUTimeStamp::getEvent(IStringVal & str) const
{
    IPropertyTree* evt=p->queryPropTree("*[1]");
    if(evt)
        str.set(evt->queryName());
    return str;
}

IStringVal & CLocalWUTimeStamp::getDate(IStringVal & str) const
{
    str.set(p->queryProp("*[1]"));
    return str;
}

CLocalWUAppValue::CLocalWUAppValue(IPropertyTree *props,unsigned child): p(props)
{
    prop.append("*[").append(child).append("]");
}

IStringVal & CLocalWUAppValue::getApplication(IStringVal & str) const
{
    str.set(p->queryName());
    return str;
}

IStringVal & CLocalWUAppValue::getName(IStringVal & str) const
{
    IPropertyTree* val=p->queryPropTree(prop.str());
    if(val)
        str.set(val->queryName());
    return str;
}

IStringVal & CLocalWUAppValue::getValue(IStringVal & str) const
{
    str.set(p->queryProp(prop.str()));
    return str;
}

extern WORKUNIT_API ILocalWorkUnit * createLocalWorkUnit()
{
    Owned<CLocalWorkUnit> cw = new CLocalWorkUnit("W_LOCAL", NULL, (ISecManager*)NULL, NULL);
    ILocalWorkUnit* ret = QUERYINTERFACE(&cw->lockRemote(false), ILocalWorkUnit);
    return ret;
}

extern WORKUNIT_API StringBuffer &exportWorkUnitToXML(const IConstWorkUnit *wu, StringBuffer &str)
{
    const CLocalWorkUnit *w = QUERYINTERFACE(wu, const CLocalWorkUnit);
    if (!w)
    {
        const CLockedWorkUnit *wl = QUERYINTERFACE(wu, const CLockedWorkUnit);
        if (wl)
            w = wl->c;
    }
    if (w)
        toXML(w->p, str, 0, XML_Format|XML_SortTags);
    else
        str.append("Unrecognized workunit format");
    return str;
}

extern WORKUNIT_API IStringVal& exportWorkUnitToXML(const IConstWorkUnit *wu, IStringVal &str)
{
    StringBuffer x;
    str.set(exportWorkUnitToXML(wu,x).str());
    return str;
}

extern WORKUNIT_API void exportWorkUnitToXMLFile(const IConstWorkUnit *wu, const char * filename, unsigned extraXmlFlags)
{
    const CLocalWorkUnit *w = QUERYINTERFACE(wu, const CLocalWorkUnit);
    if (!w)
    {
        const CLockedWorkUnit *wl = QUERYINTERFACE(wu, const CLockedWorkUnit);
        if (wl)
            w = wl->c;
    }
    if (w)
        saveXML(filename, w->p, 0, XML_Format|XML_SortTags|extraXmlFlags);
}


extern WORKUNIT_API void submitWorkUnit(const char *wuid, const char *username, const char *password)
{
    MemoryBuffer buffer;
    Owned<INamedQueueConnection> conn = createNamedQueueConnection(0); // MORE - security token?
    Owned<IWorkUnitFactory> factory = getWorkUnitFactory();
    Owned<IWorkUnit> workunit = factory->updateWorkUnit(wuid);
    assertex(workunit);

    SCMStringBuffer token;
    createToken(wuid, username, password, token);
    workunit->setSecurityToken(token.str());
    SCMStringBuffer clusterName;
    workunit->getClusterName(clusterName);
    if (!clusterName.length()) 
        throw MakeStringException(WUERR_InvalidCluster, "No target cluster specified");
    workunit->commit();
    workunit.clear();
    Owned<IConstWUClusterInfo> clusterInfo = getTargetClusterInfo(clusterName.str());
    if (!clusterInfo) 
        throw MakeStringException(WUERR_InvalidCluster, "Unknown cluster %s", clusterName.str());
    SCMStringBuffer serverQueue;
    clusterInfo->getServerQueue(serverQueue);
    assertex(serverQueue.length());
    Owned<IJobQueue> queue = createJobQueue(serverQueue.str());
    if (!queue.get()) 
        throw MakeStringException(WUERR_InvalidQueue, "Could not create workunit queue");

    IJobQueueItem *item = createJobQueueItem(wuid);
    queue->enqueue(item);
}
extern WORKUNIT_API void abortWorkUnit(const char *wuid)
{
    StringBuffer xpath("/WorkUnitAborts/");
    xpath.append(wuid);
    Owned<IRemoteConnection> acon = querySDS().connect(xpath.str(), myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE, SDS_LOCK_TIMEOUT);
    acon->queryRoot()->setPropInt(NULL, 1);
}
extern WORKUNIT_API void secSubmitWorkUnit(const char *wuid, ISecManager &secmgr, ISecUser &secuser)
{
    if (checkWuSecAccess(wuid, secmgr, &secuser, SecAccess_Write, "Submit", true, true))
        submitWorkUnit(wuid, secuser.getName(), secuser.credentials().getPassword());
}

extern WORKUNIT_API void secAbortWorkUnit(const char *wuid, ISecManager &secmgr, ISecUser &secuser)
{
    if (checkWuSecAccess(wuid, secmgr, &secuser, SecAccess_Write, "Submit", true, true))
        abortWorkUnit(wuid);
}

bool CLocalWorkUnit::hasWorkflow() const
{
    return p->hasProp("Workflow");
}

unsigned CLocalWorkUnit::queryEventScheduledCount() const
{
    CriticalBlock block(crit);
    return p->getPropInt("Workflow/@eventScheduledCount", 0);
}

void CLocalWorkUnit::incEventScheduledCount()
{
    CriticalBlock block(crit);
    p->setPropInt("Workflow/@eventScheduledCount", p->getPropInt("Workflow/@eventScheduledCount", 0)+1);
}

IPropertyTree * CLocalWorkUnit::queryWorkflowTree() const
{
    CriticalBlock block(crit);
    return p->queryPropTree("Workflow");
}

IConstWorkflowItemIterator* CLocalWorkUnit::getWorkflowItems() const
{
    // For this to be legally called, we must have the read-able interface. So we are already locked for (at least) read.
    CriticalBlock block(crit);
    if(!workflowIteratorCached)
    {
        assertex(!workflowIterator);
        Owned<IPropertyTree> s = p->getPropTree("Workflow");
        if(s)
            workflowIterator.setown(createWorkflowItemIterator(s)); 
        workflowIteratorCached = true;
    }
    return workflowIterator.getLink();
}

IWorkflowItemArray * CLocalWorkUnit::getWorkflowClone() const
{
    unsigned count = 0;
    Owned<IConstWorkflowItemIterator> iter = getWorkflowItems();
    for(iter->first(); iter->isValid(); iter->next())
        count++;
    Owned<IWorkflowItemArray> array = createWorkflowItemArray(count);
    for(iter->first(); iter->isValid(); iter->next())
        array->addClone(iter->query());
    return array.getLink();
}

IWorkflowItem * CLocalWorkUnit::addWorkflowItem(unsigned wfid, WFType type, WFMode mode, unsigned success, unsigned failure, unsigned recovery, unsigned retriesAllowed, unsigned contingencyFor)
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    workflowIterator.clear();
    workflowIteratorCached = false;
    IPropertyTree * s = p->queryPropTree("Workflow");
    if(!s)
        s = p->addPropTree("Workflow", createPTree("Workflow"));
    return createWorkflowItem(s, wfid, type, mode, success, failure, recovery, retriesAllowed, contingencyFor);
}

IWorkflowItemIterator * CLocalWorkUnit::updateWorkflowItems()
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    if(!workflowIterator)
    {
        IPropertyTree * s = p->queryPropTree("Workflow");
        if(!s)
            s = p->addPropTree("Workflow", createPTree("Workflow"));
        workflowIterator.setown(createWorkflowItemIterator(s)); 
        workflowIteratorCached = true;
    }
    return workflowIterator.getLink();
}

void CLocalWorkUnit::syncRuntimeWorkflow(IWorkflowItemArray * array)
{
    Owned<IWorkflowItemIterator> iter = updateWorkflowItems();
    Owned<IWorkflowItem> item;
    for(iter->first(); iter->isValid(); iter->next())
    {
        item.setown(iter->get());
        item->syncRuntimeData(array->queryWfid(item->queryWfid()));
    }
    workflowIterator.clear();
    workflowIteratorCached = false;
}

void CLocalWorkUnit::resetWorkflow()
{
    if (hasWorkflow())
    {
        Owned<IWorkflowItemIterator> iter = updateWorkflowItems();
        Owned<IWorkflowItem> wf;
        for(iter->first(); iter->isValid(); iter->next())
        {
            wf.setown(iter->get());
            wf->reset();
        }
        workflowIterator.clear();
        workflowIteratorCached = false;
    }
}

void CLocalWorkUnit::schedule()
{
    CriticalBlock block(crit);
    if(queryEventScheduledCount() == 0) return;

    switch(getState())
    {
    case WUStateCompleted:
        setState(WUStateWait);
        break;
    case WUStateFailed:
    case WUStateArchived:
    case WUStateAborting:
    case WUStateAborted:
    case WUStateScheduled:
        throw MakeStringException(WUERR_CannotSchedule, "Cannot schedule workunit in this state");
    }

    StringBuffer rootPath;
    SCMStringBuffer clusterName;
    getClusterName(clusterName);
    rootPath.append("/Schedule/").append(clusterName.str());
    Owned<IRemoteConnection> conn = querySDS().connect(rootPath.str(), myProcessSession(), RTM_LOCK_WRITE | RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);
    Owned<IPropertyTree> root = conn->getRoot();
    if(!root->hasChildren())
    {
        StringBuffer addPath;
        addPath.append("/Schedulers/").append(clusterName.str());
        Owned<IRemoteConnection> addConn = querySDS().connect(addPath.str(), myProcessSession(), RTM_LOCK_WRITE | RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);
    }

    char const * wuid = p->queryName();
    StringBuffer xpath("*/*/");
    ncnameEscape(wuid, xpath);
    bool more;
    do more = root->removeProp(xpath.str()); while(more);
        
    Owned<IConstWorkflowItemIterator> iter = getWorkflowItems();
    Owned<IWorkflowEvent> event;
    Owned<IPropertyTree> branch1, branch2;
    for(iter->first(); iter->isValid(); iter->next())
    {
        event.setown(iter->query()->getScheduleEvent());
        if(!event) continue;
        ncnameEscape(event->queryName(), xpath.clear());
        ensurePTree(root, xpath.str());
        branch1.setown(root->getPropTree(xpath.str()));
        ncnameEscape(event->queryText(), xpath.clear());
        ensurePTree(branch1, xpath.str());
        branch2.setown(branch1->getPropTree(xpath.str()));
        ncnameEscape(wuid, xpath.clear());
        ensurePTree(branch2, xpath.str());
    }
}

void CLocalWorkUnit::deschedule()
{
    if(queryEventScheduledCount() == 0) return;
    if(getState() == WUStateWait)
        setState(WUStateCompleted);
    char const * wuid = p->queryName();
    StringBuffer xpath;
    xpath.append("*/*/*/");
    ncnameEscape(wuid, xpath);
    Owned<IRemoteConnection> conn = querySDS().connect("/Schedule", myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
    if(!conn) return;
    Owned<IPropertyTree> root = conn->getRoot();
    bool more;
    do more = root->removeProp(xpath.str()); while(more);
}

mapEnums localFileUploadTypes[] = {
    { UploadTypeFileSpray, "FileSpray" },
    { UploadTypeWUResult, "WUResult" },
    { UploadTypeWUResultCsv, "WUResultCsv" },
    { UploadTypeWUResultXml, "WUResultXml" },
    { UploadTypeSize, NULL }
};

class CLocalFileUpload : public CInterface, implements IConstLocalFileUpload
{
public:
    CLocalFileUpload(IPropertyTree * _tree) : tree(_tree) {}
    CLocalFileUpload(unsigned id, LocalFileUploadType type, char const * source, char const * destination, char const * eventTag)
    {
        tree.setown(createPTree());
        tree->setPropInt("@id", id);
        setEnum(tree, "@type", type, localFileUploadTypes);
        tree->setProp("@source", source);
        tree->setProp("@destination", destination);
        if (eventTag)
            tree->setProp("@eventTag", eventTag);
    }
    IMPLEMENT_IINTERFACE;
    IPropertyTree * getTree() { return tree.getLink(); }

    virtual unsigned queryID() const { return tree->getPropInt("@id"); }
    virtual LocalFileUploadType queryType() const { return (LocalFileUploadType)getEnum(tree, "@type", localFileUploadTypes); }
    virtual IStringVal & getSource(IStringVal & ret) const { ret.set(tree->queryProp("@source")); return ret; }
    virtual IStringVal & getDestination(IStringVal & ret) const { ret.set(tree->queryProp("@destination")); return ret; }
    virtual IStringVal & getEventTag(IStringVal & ret) const { if(tree->hasProp("@eventTag")) ret.set(tree->queryProp("@eventTag")); else ret.clear(); return ret; }

private:
    Owned<IPropertyTree> tree;
};

class CLocalFileUploadIterator : public CInterface, implements IConstLocalFileUploadIterator
{
public:
    CLocalFileUploadIterator(IPropertyTree * _tree) : tree(_tree), iter(tree->getElements("LocalFileUpload")) {}
    IMPLEMENT_IINTERFACE;
    bool first() { return iter->first(); }
    bool isValid() { return iter->isValid(); }
    bool next() { return iter->next(); }
    IConstLocalFileUpload * get() { return new CLocalFileUpload(&iter->get()); }

private:
    Owned<IPropertyTree> tree;
    Owned<IPropertyTreeIterator> iter;
};

IConstLocalFileUploadIterator * CLocalWorkUnit::getLocalFileUploads() const
{
    // For this to be legally called, we must have the read-able interface. So we are already locked for (at least) read.
    CriticalBlock block(crit);
    Owned<IPropertyTree> s = p->getPropTree("LocalFileUploads");
    if(s)
        return new CLocalFileUploadIterator(s.getClear());
    else
        return NULL;
}

bool CLocalWorkUnit::requiresLocalFileUpload() const
{
    SCMStringBuffer dest;
    Owned<IConstWUResult> result;
    Owned<IConstLocalFileUploadIterator> iter(getLocalFileUploads());
    if(!iter)
        return false;
    for(iter->first(); iter->isValid(); iter->next())
    {
        Owned<IConstLocalFileUpload> upload(iter->get());
        switch(upload->queryType())
        {
        case UploadTypeWUResult:
        case UploadTypeWUResultCsv:
        case UploadTypeWUResultXml:
            upload->getDestination(dest);
            result.setown(getResultByName(dest.str()));
            if(!result)
                return true;
            break;
        default:
            throw MakeStringException(WUERR_InvalidUploadFormat, "Unsupported local file upload type %s", getEnumText(upload->queryType(), localFileUploadTypes));
        }
    }
    return false;
}

unsigned CLocalWorkUnit::addLocalFileUpload(LocalFileUploadType type, char const * source, char const * destination, char const * eventTag)
{
    // For this to be legally called, we must have the write-able interface. So we are already locked for write.
    CriticalBlock block(crit);
    IPropertyTree * s = p->queryPropTree("LocalFileUploads");
    if(!s)
        s = p->addPropTree("LocalFileUploads", createPTree());
    unsigned id = s->numChildren();
    Owned<CLocalFileUpload> upload = new CLocalFileUpload(id, type, source, destination, eventTag);
    s->addPropTree("LocalFileUpload", upload->getTree());
    return id;
}

#if 0
void testConstWorkflow(IConstWorkflowItem * cwf, bool * okay, bool * dep)
{
    DBGLOG("Test workflow const iface %u", cwf->queryWfid());
    unsigned deps = 0;
    Owned<IWorkflowDependencyIterator> diter;
    switch(cwf->queryWfid())
    {
    case 1:
        assertex(!cwf->isScheduled());
        assertex(cwf->queryType() == WFTypeNormal);
        assertex(cwf->queryState() == WFStateNull);
        diter.setown(cwf->getDependencies());
        for(diter->first(); diter->isValid(); diter->next())
            deps++;
        assertex(deps==0);
        okay[0] = true;
        break;
    case 2:
        assertex(!cwf->isScheduled());
        assertex(cwf->queryType() == WFTypeRecovery);
        assertex(cwf->queryState() == WFStateSkip);
        okay[1] = true;
        break;
    case 3:
        assertex(cwf->queryContingencyFor() == 4);
        okay[2] = true;
        break;
    case 4:
        assertex(cwf->isScheduled());
        assertex(cwf->queryType() == WFTypeNormal);
        assertex(cwf->queryState() == WFStateReqd);
        assertex(cwf->querySuccess() == 0);
        assertex(cwf->queryFailure() == 3);
        assertex(cwf->queryRecovery() == 2);
        assertex(cwf->queryRetriesAllowed() == 10);
        assertex(cwf->queryRetriesRemaining() == 10);
        diter.setown(cwf->getDependencies());
        for(diter->first(); diter->isValid(); diter->next())
        {
            dep[diter->query()-1] = true;
            deps++;
        }
        assertex(deps==2);
        assertex(dep[0]);
        assertex(dep[1]);
        okay[3] = true;
        break;
    case 5:
        assertex(cwf->isScheduled());
        assertex(!cwf->isScheduledNow());
        assertex(cwf->querySchedulePriority() == 75);
        assertex(cwf->queryScheduleCount() == 5);
        assertex(cwf->queryScheduleCountRemaining() == 5);
        okay[4] = true;
        break;
    case 6:
        assertex(cwf->isScheduled());
        assertex(!cwf->isScheduledNow());
        assertex(cwf->querySchedulePriority() == 25);
        assertex(!cwf->hasScheduleCount());
        okay[5] = true;
        break;
    default:
        assertex(!"unknown wfid in test");
    }
}

void testRuntimeWorkflow(IRuntimeWorkflowItem * rwf, bool * okay)
{
    DBGLOG("Test workflow runtime iface %u", rwf->queryWfid());
    switch(rwf->queryWfid())
    {
    case 1:
    case 2:
    case 3:
        okay[rwf->queryWfid()-1] = true;
        break;
    case 4:
        {
            unsigned tries = 0;
            while(rwf->testAndDecRetries())
                tries++;
            assertex(tries == 10);
            assertex(rwf->queryRetriesRemaining() == 0);
            rwf->setState(WFStateFail);
            assertex(rwf->queryState() == WFStateFail);
            rwf->reset();
            assertex(rwf->queryRetriesRemaining() == 10);
            assertex(rwf->queryState() == WFStateReqd);
        }
        okay[3] = true;
        break;
    case 5:
        {
            assertex(rwf->queryScheduleCountRemaining() == 5);
            unsigned count = 0;
            do count++; while(rwf->decAndTestScheduleCountRemaining());
            assertex(count == 5);
            assertex(rwf->queryScheduleCountRemaining() == 0);
            rwf->reset();
            assertex(rwf->queryScheduleCountRemaining() == 5);
        }
        okay[4] = true;
        break;
    case 6:
        {
            assertex(!rwf->hasScheduleCount());
            unsigned count;
            for(count=0; count<20; count++)
                assertex(rwf->decAndTestScheduleCountRemaining());
        }
        okay[5] = true;
        break;
    default:
        assertex(!"unknown wfid in test");
    }
}

void testWorkflow()
{
    DBGLOG("workunit.cpp : testWorkflow");
    CLocalWorkUnit wu("W-WF-TEST", 0, 0, 0);
    Owned<IWorkflowItem> wf;
    wf.setown(wu.addWorkflowItem(1, WFTypeNormal, 0, 0, 0, 0, 0));
    wf.setown(wu.addWorkflowItem(2, WFTypeRecovery, 0, 0, 0, 0, 0));
    wf.setown(wu.addWorkflowItem(3, WFTypeFailure, 0, 0, 0, 0, 4));
    wf.setown(wu.addWorkflowItem(4, WFTypeNormal, 0, 3, 2, 10, 0));
    wf->setScheduledNow();
    wf->addDependency(1);
    wf.setown(wu.addWorkflowItem(5, WFTypeNormal, 0, 0, 0, 0, 0));
    wf->setScheduledOn("test", "foo*");
    wf->setSchedulePriority(75);
    wf->setScheduleCount(5);
    wf.setown(wu.addWorkflowItem(6, WFTypeNormal, 0, 0, 0, 0, 0));
    wf->setScheduledOn("test", "bar*");
    wf->setSchedulePriority(25);

    unsigned const n = 6;
    bool okay[n];
    bool dep[n];
    unsigned i;
    for(i=0; i<n; i++)
        okay[i] = dep[i] = 0;

    Owned<IConstWorkflowItemIterator> citer(wu.getWorkflowItems());
    for(citer->first(); citer->isValid(); citer->next())
        testConstWorkflow(citer->query(), okay, dep);

    for(i=0; i<n; i++)
    {
        assertex(okay[i]);
        okay[i] = false;
    }

    Owned<IWorkflowItemIterator> miter(wu.updateWorkflowItems());
    for(miter->first(); miter->isValid(); miter->next())
    {
        Owned<IRuntimeWorkflowItem> rwf(miter->get());
        testRuntimeWorkflow(rwf, okay);
    }

    for(i=0; i<n; i++)
    {
        assertex(okay[i]);
        okay[i] = dep[i] = false;
    }

    Owned<IWorkflowItemArray> array(wu.getWorkflowClone());
    unsigned wfid;
    for(wfid = 1; array->isValid(wfid); wfid++)
        testConstWorkflow(&array->queryWfid(wfid), okay, dep);

    for(i=0; i<n; i++)
    {
        assertex(okay[i]);
        okay[i] = false;
    }

    for(wfid = 1; array->isValid(wfid); wfid++)
        testRuntimeWorkflow(&array->queryWfid(wfid), okay);

    for(i=0; i<n; i++)
    {
        assertex(okay[i]);
        okay[i] = false;
    }
}
#endif

//------------------------------------------------------------------------------------------

class WorkUnitWaiter : public CInterface, implements ISDSSubscription, implements IAbortHandler
{
    Semaphore changed;
    SubscriptionId change;
public:
    IMPLEMENT_IINTERFACE;

    WorkUnitWaiter(const char *xpath) 
    {
        change = querySDS().subscribe(xpath, *this, false);
        aborted = false; 
    }
    ~WorkUnitWaiter()
    {
        assertex(change==0);
    }

    void notify(SubscriptionId id, const char *xpath, SDSNotifyFlags flags, unsigned valueLen, const void *valueData)
    {
        changed.signal();
    }
    bool wait(unsigned timeout)
    {
        return changed.wait(timeout) && !aborted;
    }
    bool onAbort()
    {
        aborted = true;
        changed.signal();
        return false;
    }
    void unsubscribe()
    {
        querySDS().unsubscribe(change);
        change = 0;
    }
    bool aborted;
};

static WUState _waitForWorkUnit(const char * wuid, unsigned timeout, bool compiled, bool returnOnWaitState)
{
    StringBuffer wuRoot;
    getXPath(wuRoot, wuid);
    WorkUnitWaiter waiter(wuRoot.str());
    LocalIAbortHandler abortHandler(waiter);
    WUState ret = WUStateUnknown;
    Owned<IRemoteConnection> conn = querySDS().connect(wuRoot.str(), myProcessSession(), 0, SDS_LOCK_TIMEOUT);
    if (conn)
    {
        unsigned start = msTick();
        loop
        {
            ret = (WUState) getEnum(conn->queryRoot(), "@state", states);
            switch (ret)
            {
            case WUStateCompiled:
            case WUStateUploadingFiles:
                if (!compiled)
                    break;
                // fall into
            case WUStateCompleted:
            case WUStateFailed:
            case WUStateAborted:
                waiter.unsubscribe();
                return ret;
            case WUStateWait:
                if(returnOnWaitState)
                {
                    waiter.unsubscribe();
                    return ret;
                }
                break;
            case WUStateCompiling:
            case WUStateRunning:
            case WUStateDebugPaused:
            case WUStateDebugRunning:
            case WUStateBlocked:
            case WUStateAborting:
                if (queryDaliServerVersion().compare("2.1")>=0)
                {
                    SessionId agent = conn->queryRoot()->getPropInt64("@agentSession", -1);
                    if((agent>0) && querySessionManager().sessionStopped(agent, 0))
                    {
                        waiter.unsubscribe();
                        conn->reload();
                        ret = (WUState) getEnum(conn->queryRoot(), "@state", states);
                        bool isEcl = false;
                        switch (ret)
                        {
                            case WUStateCompiling:
                                isEcl = true;
                                // drop into
                            case WUStateRunning:
                            case WUStateBlocked:
                                ret = WUStateFailed;
                                break;
                            case WUStateAborting:
                                ret = WUStateAborted;
                                break;
                            default:
                                return ret;
                        }
                        WARNLOG("_waitForWorkUnit terminated: %"I64F"d state = %d",(__int64)agent,(int)ret);
                        Owned<IWorkUnitFactory> factory = getWorkUnitFactory();
                        Owned<IWorkUnit> wu = factory->updateWorkUnit(wuid);
                        wu->setState(ret);
                        Owned<IWUException> e = wu->createException();
                        e->setExceptionCode(isEcl ? 1001 : 1000);
                        e->setExceptionMessage(isEcl ? "EclServer terminated unexpectedly" : "Workunit terminated unexpectedly");
                        return ret;
                    }
                }
                break;
            }
            unsigned waited = msTick() - start;
            if (timeout==-1)
            {
                waiter.wait(20000);  // recheck state every 20 seconds even if no timeout, in case eclagent has crashed.
                if (waiter.aborted)
                {
                    ret = WUStateUnknown;  // MORE - throw an exception?
                    break;
                }
            }
            else if (waited > timeout || !waiter.wait(timeout-waited))
            {
                ret = WUStateUnknown;  // MORE - throw an exception?
                break;
            }
            conn->reload();
        }
    }
    waiter.unsubscribe();
    return ret;
}

extern WUState waitForWorkUnitToComplete(const char * wuid, int timeout, bool returnOnWaitState)
{
    return _waitForWorkUnit(wuid, (unsigned)timeout, false, returnOnWaitState);
}

extern WORKUNIT_API WUState secWaitForWorkUnitToComplete(const char * wuid, ISecManager &secmgr, ISecUser &secuser, int timeout, bool returnOnWaitState)
{
    if (checkWuSecAccess(wuid, secmgr, &secuser, SecAccess_Read, "Wait for Complete", false, true))
        return waitForWorkUnitToComplete(wuid, timeout, returnOnWaitState);
    return WUStateUnknown;
}

extern bool waitForWorkUnitToCompile(const char * wuid, int timeout)
{
    switch(_waitForWorkUnit(wuid, (unsigned)timeout, true, true))
    {
    case WUStateCompiled:
    case WUStateCompleted:
    case WUStateWait:
    case WUStateUploadingFiles:
        return true;
    default:
        return false;
    }
}

extern WORKUNIT_API bool secWaitForWorkUnitToCompile(const char * wuid, ISecManager &secmgr, ISecUser &secuser, int timeout)
{
    if (checkWuSecAccess(wuid, secmgr, &secuser, SecAccess_Read, "Wait for Compile", false, true))
        return waitForWorkUnitToCompile(wuid, timeout);
    return false;
}

extern WORKUNIT_API bool secDebugWorkunit(const char * wuid, ISecManager &secmgr, ISecUser &secuser, const char *command, StringBuffer &response)
{
    if (strnicmp(command, "<debug:", 7) == 0 && checkWuSecAccess(wuid, secmgr, &secuser, SecAccess_Read, "Debug", false, true))
    {
        Owned<IConstWorkUnit> wu = factory->secOpenWorkUnit(wuid, false, &secmgr, &secuser);
        SCMStringBuffer ip;
        unsigned port;
        port = wu->getDebugAgentListenerPort();
        wu->getDebugAgentListenerIP(ip);
        SocketEndpoint debugEP(ip.str(), port);
        Owned<ISocket> socket = ISocket::connect_timeout(debugEP, 1000);
        unsigned len = (size32_t)strlen(command);
        unsigned revlen = len;
        _WINREV(revlen);
        socket->write(&revlen, sizeof(revlen));
        socket->write(command, len);
        for (;;)
        {
            socket->read(&len, sizeof(len));
            _WINREV(len);                    
            if (len == 0)
                break;
            if (len & 0x80000000)
            {
                throwUnexpected();
            }
            char * mem = (char*) response.reserve(len);
            socket->read(mem, len);
        }
        return true;
    }
    return false;
}

IWUResult * updateWorkUnitResult(IWorkUnit * w, const char *name, unsigned sequence)
{
    switch ((int)sequence)
    {
    case ResultSequenceStored:
        return w->updateVariableByName(name);
    case ResultSequencePersist:
        return w->updateGlobalByName(name);
    case ResultSequenceInternal:
    case ResultSequenceOnce:
        return w->updateTemporaryByName(name);
    default:
        return w->updateResultBySequence(sequence);
    }
}

IConstWUResult * getWorkUnitResult(IConstWorkUnit * w, const char *name, unsigned sequence)
{
    switch ((int)sequence)
    {
    case ResultSequenceStored:
        return w->getVariableByName(name);

    case ResultSequencePersist:
        return w->getGlobalByName(name);

    case ResultSequenceInternal:
    case ResultSequenceOnce:
        return w->getTemporaryByName(name);

    default:
        if (name && name[0])
            return w->getResultByName(name);//name takes precedence over sequence
        else
            return w->getResultBySequence(sequence);
    }
}

extern WORKUNIT_API bool getWorkUnitCreateTime(const char *wuid,CDateTime &time)
{
    if (wuid) {
        char prefchar;
        unsigned year,month,day,hour,min,sec;
        if (sscanf(wuid, "%c%4u%2u%2u-%2u%2u%2u", &prefchar, &year, &month, &day, &hour, &min, &sec)==7) {
            time.set(year, month, day, hour, min, sec, 0, true);
//          time.setDate(year, month, day);
//          time.setTime(hour, min, sec, 0, true);  // for some reason time is local
            return true;
        }
    }
    return false;
}

extern WORKUNIT_API IStringVal& createToken(const char *wuid, const char *user, const char *password, IStringVal &str)
{
    StringBuffer wu, token("X");
    wu.append(wuid).append(';').append(user).append(';').append(password);
    encrypt(token,wu.str());
    str.set(token.str());
    return str;
}

// This will be replaced by something more secure!
extern WORKUNIT_API void extractToken(const char *token, const char *wuid, IStringVal &user, IStringVal &password)
{
    if (token && *token)
    {
        StringBuffer wu;
        decrypt(wu, token+1);
        const char *finger = strchr(wu.str(),';');
        if (finger && strnicmp(wuid, wu.str(), finger-wu.str())==0)
        {
            const char *finger1 = strchr(++finger,';');
            if(finger1)
            {
                user.setLen(finger, (size32_t)(finger1-finger));
                password.setLen(++finger1, (size32_t)(wu.str() + wu.length() - finger1));
                return;
            }
        }
        throw MakeStringException(WUERR_InvalidSecurityToken, "Invalid call to extractToken");
    }
}

extern WORKUNIT_API WUState getWorkUnitState(const char* state)
{
    return (WUState) getEnum(state, states);
}

const LogMsgCategory MCschedconn = MCprogress(1000);    // Category used to inform about schedule synchronization

class CWorkflowScheduleConnection : public CInterface, implements IWorkflowScheduleConnection
{
public:
    CWorkflowScheduleConnection(char const * wuid)
    {
        basexpath.append("/WorkflowSchedule/").append(wuid);
        flagxpath.append(basexpath.str()).append("/Active");
    }

    IMPLEMENT_IINTERFACE;

    virtual void lock()
    {
        LOG(MCschedconn, "Locking base schedule connection");
        baseconn.setown(querySDS().connect(basexpath.str(), myProcessSession(), RTM_CREATE_QUERY | RTM_LOCK_WRITE, INFINITE));
        if(!baseconn)
            throw MakeStringException(WUERR_ScheduleLockFailed, "Could not get base workflow schedule lock");
    }

    virtual void unlock()
    {
        LOG(MCschedconn, "Unlocking base schedule connection");
        baseconn.clear();
    }

    virtual void setActive()
    {
        LOG(MCschedconn, "Setting active flag in schedule connection");
        flagconn.setown(querySDS().connect(flagxpath.str(), myProcessSession(), RTM_CREATE | RTM_LOCK_WRITE | RTM_DELETE_ON_DISCONNECT, INFINITE));
        if(!flagconn)
            throw MakeStringException(WUERR_ScheduleLockFailed, "Could not get active workflow schedule lock");
    }

    virtual void resetActive()
    {
        LOG(MCschedconn, "Resetting active flag in schedule connection");
        flagconn.clear();
    }

    virtual bool queryActive()
    {
        return baseconn->queryRoot()->hasProp("Active");
    }

    virtual bool pull(IWorkflowItemArray * workflow)
    {
        assertex(baseconn);
        Owned<IPropertyTree> root = baseconn->getRoot();
        Owned<IPropertyTree> eventQueue = root->getPropTree("EventQueue");
        if(!eventQueue) return false;
        if(!eventQueue->hasProp("Item")) return false;
        {
            Owned<IPropertyTreeIterator> eventItems = eventQueue->getElements("Item");
            Owned<IPropertyTree> eventItem;
            Owned<IRuntimeWorkflowItemIterator> wfItems = workflow->getSequenceIterator();
            Owned<IRuntimeWorkflowItem> wfItem;
            for(eventItems->first(); eventItems->isValid(); eventItems->next())
            {
                eventItem.setown(&eventItems->get());
                const char * eventName = eventItem->queryProp("@name");
                const char * eventText = eventItem->queryProp("@text");
                for(wfItems->first(); wfItems->isValid(); wfItems->next())
                {
                    wfItem.setown(wfItems->get());
                    if(wfItem->queryState() != WFStateWait)
                        continue;
                    Owned<IWorkflowEvent> targetEvent = wfItem->getScheduleEvent();
                    if(!targetEvent || !targetEvent->matches(eventName, eventText))
                        continue;
                    wfItem->setEvent(eventName, eventText);
                    wfItem->setState(WFStateReqd);
                    resetDepState(workflow, *wfItem);
                }
            }
        }
        bool more;
        do
            more = eventQueue->removeProp("Item");
        while(more);
        return true;
    }

    virtual void push(char const * name, char const * text)
    {
        assertex(baseconn);
        Owned<IPropertyTree> root = baseconn->getRoot();
        ensurePTree(root, "EventQueue");
        Owned<IPropertyTree> eventQueue = root->getPropTree("EventQueue");
        Owned<IPropertyTree> eventItem = createPTree();
        eventItem->setProp("@name", name);
        eventItem->setProp("@text", text);
        eventQueue->addPropTree("Item", eventItem.getLink());
    }

private:
    void resetDepState(IWorkflowItemArray * workflow, IRuntimeWorkflowItem & item) const
    {
        Owned<IWorkflowDependencyIterator> iter(item.getDependencies());
        for(iter->first(); iter->isValid(); iter->next())
        {
            IRuntimeWorkflowItem & dep = workflow->queryWfid(iter->query());
            switch(dep.queryState())
            {
            case WFStateDone:
            case WFStateFail:
                dep.setState(WFStateNull);
                resetDepState(workflow, dep);
                break;
            }
        }
    }

private:
    StringBuffer basexpath;
    StringBuffer flagxpath;
    Owned<IRemoteConnection> baseconn;
    Owned<IRemoteConnection> flagconn;
};

extern WORKUNIT_API IWorkflowScheduleConnection * getWorkflowScheduleConnection(char const * wuid)
{
    return new CWorkflowScheduleConnection(wuid);
}

extern WORKUNIT_API IExtendedWUInterface * queryExtendedWU(IWorkUnit * wu)
{
    return QUERYINTERFACE(wu, IExtendedWUInterface);
}


extern WORKUNIT_API void addExceptionToWorkunit(IWorkUnit * wu, WUExceptionSeverity severity, const char * source, unsigned code, const char * text, const char * filename, unsigned lineno, unsigned column)
{
    Owned<IWUException> we = wu->createException();
    we->setSeverity(severity);
    we->setExceptionMessage(text);
    if (source)
        we->setExceptionSource(source);
    if (code)
        we->setExceptionCode(code);
    if (filename)
        we->setExceptionFileName(filename);
    if (lineno)
    {
        we->setExceptionLineNo(lineno);
        if (column)
            we->setExceptionColumn(lineno);
    }
}

#define UTF8_BOM    "\357\273\277"

extern WORKUNIT_API bool isArchiveQuery(const char * text)
{
    if (!text)
        return false;

    //skip utf8 BOM, probably excessive
    if (memcmp(text, UTF8_BOM, 3) == 0)
        text += 3;

    loop
    {
        if (isspace(*text))
            text++;
        else if (text[0] == '<' && text[1] == '!' && text[2] == '-' && text[3] == '-')
        {
            text += 4;
            loop
            {
                if (!*text) break;
                if (text[0] == '-' && text[1] == '-' && text[2] == '>')
                {
                    text += 3;
                    break;
                }
                text++;
            }
        }
        else
            break;
    }

    const char * archivePrefix = "<Archive";
    return memicmp(text, archivePrefix, strlen(archivePrefix)) == 0;
}

//------------------------------------------------------------------------------
// Named Alias helper function

static IPropertyTree * resolveQueryByDll(IPropertyTree * queryRegistry, const char * dll)
{
    StringBuffer xpath;
    xpath.append("Query[@dll=\"").append(dll).append("\"]");
    return queryRegistry->getPropTree(xpath);
}


static IPropertyTree * resolveQueryByWuid(IPropertyTree * queryRegistry, const char * wuid)
{
    StringBuffer xpath;
    xpath.append("Query[@wuid=\"").append(wuid).append("\"]");
    return queryRegistry->getPropTree(xpath);
}


static void clearAliases(IPropertyTree * queryRegistry, const char * id)
{
    StringBuffer lcId(id);
    lcId.toLowerCase();

    StringBuffer xpath;
    xpath.append("Alias[@id=\"").append(lcId).append("\"]");

    Owned<IPropertyTreeIterator> iter = queryRegistry->getElements(xpath);
    ForEach(*iter)
    {
        queryRegistry->removeProp(xpath.str());
    }
}

IPropertyTree * addNamedQuery(IPropertyTree * queryRegistry, const char * name, const char * wuid, const char * dll)
{
    StringBuffer xpath;
    xpath.append("Query[@wuid=\"").append(wuid).append("\"]");
    IPropertyTree *q = queryRegistry->queryPropTree(xpath.str());
    if (q)
        return q;

    StringBuffer lcName(name);
    lcName.toLowerCase();
    xpath.clear();
    xpath.append("Query[@name=\"").append(lcName.str()).append("\"]");

    Owned<IPropertyTreeIterator> iter = queryRegistry->getElements(xpath);
    unsigned seq = 1;
    ForEach(*iter)
    {
        unsigned thisSeq = iter->query().getPropInt("@seq");
        if (thisSeq >= seq)
            seq = thisSeq + 1;
    }

    StringBuffer id;
    id.append(lcName).append(".").append(seq);
    IPropertyTree * newEntry = createPTree("Query", ipt_caseInsensitive);
    newEntry->setProp("@name", lcName);
    newEntry->setProp("@wuid", wuid);
    newEntry->setProp("@dll", dll);
    newEntry->setProp("@id", id);
    newEntry->setPropInt("@seq", seq);
    return queryRegistry->addPropTree("Query", newEntry);
}

void removeNamedQuery(IPropertyTree * queryRegistry, const char * id)
{
    StringBuffer lcId(id);
    lcId.toLowerCase();

    clearAliases(queryRegistry, lcId);
    StringBuffer xpath;
    xpath.append("Query[@id=\"").append(lcId).append("\"]");
    queryRegistry->removeProp(xpath);
}


void removeDllFromNamedQueries(IPropertyTree * queryRegistry, const char * dll)
{
    Owned<IPropertyTree> match = resolveQueryByDll(queryRegistry, dll);
    if (!match)
        return;
    clearAliases(queryRegistry, match->queryProp("@id"));
    queryRegistry->removeTree(match);
}

void removeWuidFromNamedQueries(IPropertyTree * queryRegistry, const char * wuid)
{
    Owned<IPropertyTree> match = resolveQueryByWuid(queryRegistry, wuid);
    if (!match)
        return;
    clearAliases(queryRegistry, match->queryProp("@id"));
    queryRegistry->removeTree(match);
}

void removeAliasesFromNamedQuery(IPropertyTree * queryRegistry, const char * id)
{
    clearAliases(queryRegistry, id);
}

void setQueryAlias(IPropertyTree * queryRegistry, const char * name, const char * value)
{
    StringBuffer lcName(name);
    lcName.toLowerCase();

    StringBuffer xpath;
    xpath.append("Alias[@name=\"").append(lcName).append("\"]");
    IPropertyTree * match = queryRegistry->queryPropTree(xpath);
    if (!match)
    {
        IPropertyTree * newEntry = createPTree("Alias");
        newEntry->setProp("@name", lcName);
        match = queryRegistry->addPropTree("Alias", newEntry);
    }
    match->setProp("@id", value);
}

IPropertyTree * resolveQueryAlias(IPropertyTree * queryRegistry, const char * alias)
{
    StringBuffer xpath;
    unsigned cnt = 0;

    const char * search = alias;
    loop
    {
        xpath.clear().append("Alias[@name=\"").append(search).append("\"]/@id");
        const char * queryId = queryRegistry->queryProp(xpath);
        if (!queryId)
            break;
        //Check for too many alias indirections.
        if (cnt++ > 10)
            return NULL;
        search = queryId;
    }

    xpath.clear().append("Query[@id=\"").append(search).append("\"]");
    return queryRegistry->getPropTree(xpath);
}

void setQuerySuspendedState(IPropertyTree * queryRegistry, const char *id, bool suspend)
{
    StringBuffer lcId(id);
    lcId.toLowerCase();

    StringBuffer xpath;
    xpath.append("Query[@id=\"").append(lcId).append("\"]");
    IPropertyTree *tree = queryRegistry->queryPropTree(xpath);
    if (tree)
    {
        if (suspend)
            tree->addPropBool("@suspended", true);
        else
            tree->removeProp("@suspended");
    }
    else
        throw MakeStringException((suspend)? QUERRREG_SUSPEND : QUERRREG_UNSUSPEND, "Modifying query suspended state failed.  Could not find query %s", id);
}

void setQueryCommentForNamedQuery(IPropertyTree * queryRegistry, const char *id, const char *queryComment)
{
    if (queryComment)
    {
        StringBuffer lcId(id);
        lcId.toLowerCase();

        StringBuffer xpath;
        xpath.append("Query[@id=\"").append(lcId).append("\"]");
        IPropertyTree *tree = queryRegistry->queryPropTree(xpath);
        if (tree)
            tree->setProp("@queryComment", queryComment);
        else
            throw MakeStringException(QUERRREG_COMMENT,  "Could not find query %s", id);
    }
}
extern WORKUNIT_API IPropertyTree * getQueryRegistryRoot()

{
      Owned<IRemoteConnection> globalLock = querySDS().connect("/QuerySets/", myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);

      if (!globalLock)

            return NULL;

      //Only lock the branch for the target we're interested in.

      StringBuffer xpath;

      xpath.append("/QuerySets");

      Owned<IRemoteConnection> conn = querySDS().connect(xpath.str(), myProcessSession(), RTM_LOCK_READ, SDS_LOCK_TIMEOUT);
      if (conn)
            return conn->getRoot();
      else
            return NULL;
}



extern WORKUNIT_API IPropertyTree * getQueryRegistry(const char * wsEclId, bool readonly)
{
    Owned<IRemoteConnection> globalLock = querySDS().connect("/QuerySets/", myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);

    //Only lock the branch for the target we're interested in.
    StringBuffer xpath;
    xpath.append("/QuerySets/QuerySet[@id=\"").append(wsEclId).append("\"]");
    Owned<IRemoteConnection> conn = querySDS().connect(xpath.str(), myProcessSession(), readonly ? RTM_LOCK_READ : RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
    if (!conn)
    {
        if (readonly)
            return NULL;
        Owned<IPropertyTree> querySet = createPTree();
        querySet->setProp("@id", wsEclId);
        globalLock->queryRoot()->addPropTree("QuerySet", querySet.getClear());
        globalLock->commit();

        conn.setown(querySDS().connect(xpath.str(), myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT));
        if (!conn)
            throwUnexpected();
    }

    return conn->getRoot();
}


IPropertyTree * addNamedPackageSet(IPropertyTree * packageRegistry, const char * name, IPropertyTree *packageInfo, bool overWrite)
{
    StringBuffer xpath;
    StringBuffer lcName(name);
    lcName.toLowerCase();
    // see if "name" already exists
    xpath.append("Package[@id='").append(name).append("']");
    IPropertyTree *pkgTree = packageRegistry->queryPropTree(xpath.str());
    if (pkgTree)
    {
        if (overWrite)
            packageRegistry->removeTree(pkgTree);
        else
            throw MakeStringException(WUERR_PackageAlreadyExists, "Package name %s already exists, either delete it or specify overwrite",name);
    }
    
    IPropertyTree *tree = packageRegistry->addPropTree("Package", packageInfo);
    tree->setProp("@id", lcName);
    return tree;
}

void removeNamedPackage(IPropertyTree * packageRegistry, const char * id)
{
    StringBuffer lcId(id);
    lcId.toLowerCase();

    StringBuffer xpath;
    xpath.append("Package[@id=\"").append(lcId).append("\"]");
    packageRegistry->removeProp(xpath);
}

extern WORKUNIT_API IPropertyTree * getPackageSetRegistry(const char * wsEclId, bool readonly)
{
    Owned<IRemoteConnection> globalLock = querySDS().connect("/PackageSets/", myProcessSession(), RTM_LOCK_WRITE|RTM_CREATE_QUERY, SDS_LOCK_TIMEOUT);

    //Only lock the branch for the target we're interested in.
    StringBuffer xpath;
    xpath.append("/PackageSets/PackageSet[@id=\"").append(wsEclId).append("\"]");
    Owned<IRemoteConnection> conn = querySDS().connect(xpath.str(), myProcessSession(), readonly ? RTM_LOCK_READ : RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT);
    if (!conn)
    { 
        if (readonly)
            return NULL;
        Owned<IPropertyTree> querySet = createPTree();
        querySet->setProp("@id", wsEclId);
        globalLock->queryRoot()->addPropTree("PackageSet", querySet.getClear());
        globalLock->commit();

        conn.setown(querySDS().connect(xpath.str(), myProcessSession(), RTM_LOCK_WRITE, SDS_LOCK_TIMEOUT));
        if (!conn)
            throwUnexpected();
    }

    return conn->getRoot();
}

void addQueryToQuerySet(IWorkUnit *workunit, const char *querySetName, const char *queryName, IPropertyTree *packageInfo, WUQueryActivationOptions activateOption, StringBuffer &newQueryId)
{
    StringBuffer cleanQueryName(queryName);
    cleanQueryName.replace(' ', '_');

    SCMStringBuffer dllName;
    Owned<IConstWUQuery> q = workunit->getQuery();
    q->getQueryDllName(dllName);
    if (!dllName.length())
        throw MakeStringException(WUERR_InvalidDll, "Cannot deploy query - no associated dll.");

    SCMStringBuffer wuid;
    workunit->getWuid(wuid);

    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, false);

    StringBuffer currentTargetClusterType;
    queryRegistry->getProp("@targetclustertype", currentTargetClusterType); 

    SCMStringBuffer targetClusterType;
    workunit->getDebugValue("targetclustertype", targetClusterType);

    if (currentTargetClusterType.length() < 1) 
    {
        queryRegistry->setProp("@targetclustertype", targetClusterType.str());
    }
    else
    {
        if (strcmp(currentTargetClusterType.str(), "roxie") == 0 && strcmp(currentTargetClusterType.str(), targetClusterType.str())!=0)
        {
            throw MakeStringException(WUERR_MismatchClusterType, "TargetClusterTypes of workunit and queryset do not match.");
        }
    }


    IPropertyTree *newEntry = addNamedQuery(queryRegistry, cleanQueryName, wuid.str(), dllName.str());
    newQueryId.append(newEntry->queryProp("@id"));

    workunit->setDebugValue("queryId", newQueryId.str(), true);

    if (activateOption == ACTIVATE_SUSPEND_PREVIOUS|| activateOption == ACTIVATE_DELETE_PREVIOUS)
    {
        Owned<IPropertyTree> aliasTree = resolveQueryAlias(queryRegistry, cleanQueryName);
        setQueryAlias(queryRegistry, cleanQueryName, newQueryId);

        if (aliasTree)
        {
            if (activateOption == ACTIVATE_SUSPEND_PREVIOUS)
                setQuerySuspendedState(queryRegistry, cleanQueryName, true);
            else 
                removeNamedQuery(queryRegistry, aliasTree->queryProp("@id"));
        }
    }
    else if (activateOption == MAKE_ACTIVATE || activateOption == MAKE_ACTIVATE_LOAD_DATA_ONLY)
        setQueryAlias(queryRegistry, cleanQueryName, newQueryId.str());
}

bool removeQuerySetAlias(const char *querySetName, const char *alias)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, true);
    StringBuffer xpath;
    xpath.appendf("Alias[@name='%s']", alias);
    IPropertyTree *t = queryRegistry->queryPropTree(xpath);
    return queryRegistry->removeTree(t);
}

void addQuerySetAlias(const char *querySetName, const char *alias, const char *id)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, false);
    setQueryAlias(queryRegistry, alias, id);
}

void setSuspendQuerySetQuery(const char *querySetName, const char *id, bool suspend)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, true);
    setQuerySuspendedState(queryRegistry, id, suspend);
}

void deleteQuerySetQuery(const char *querySetName, const char *id)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, true);
    removeNamedQuery(queryRegistry, id);
}

void removeQuerySetAliasesFromNamedQuery(const char *querySetName, const char * id)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, true);
    clearAliases(queryRegistry, id);
}

void setQueryCommentForNamedQuery(const char *querySetName, const char *id, const char *queryComment)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, true);
    setQueryCommentForNamedQuery(queryRegistry, id, queryComment);
}

const char *queryIdFromQuerySetWuid(const char *querySetName, const char *wuid, IStringVal &id)
{
    Owned<IPropertyTree> queryRegistry = getQueryRegistry(querySetName, false);
    StringBuffer xpath;
    xpath.appendf("Query[@wuid='%s']", wuid);
    IPropertyTree *q = queryRegistry->queryPropTree(xpath.str());
    if (q)
    {
        id.set(q->queryProp("@id"));
    }
    return id.str();
}

bool looksLikeAWuid(const char * wuid)
{
    if (!wuid)
        return false;
    if (wuid[0] != 'W')
        return false;
    if (!isdigit(wuid[1]) || !isdigit(wuid[2]) || !isdigit(wuid[3]) || !isdigit(wuid[4]))
        return false;
    if (!isdigit(wuid[5]) || !isdigit(wuid[6]) || !isdigit(wuid[7]) || !isdigit(wuid[8]))
        return false;
    return (wuid[9]=='-');
}

IPropertyTree * resolveDefinitionInArchive(IPropertyTree * archive, const char * path)
{
    IPropertyTree * module = archive;
    const char * dot = strrchr(path, '.');

    StringBuffer xpath;
    if (dot)
    {
        xpath.clear().append("Module[@key='").appendLower(dot-path, path).append("']");
        module = archive->queryPropTree(xpath);

        path = dot+1;
    }
    else
        module = archive->queryPropTree("Module[@key='']");

    if (!module)
        return NULL;

    xpath.clear().append("Attribute[@key='").appendLower(strlen(path), path).append("']");
    return module->queryPropTree(xpath);
}

extern WORKUNIT_API void associateLocalFile(IWUQuery * query, WUFileType type, const char * name, const char * description, unsigned crc)
{
    StringBuffer hostname;
    queryHostIP().getIpText(hostname);

    StringBuffer fullPathname;
    makeAbsolutePath(name, fullPathname);
    query->addAssociatedFile(type, fullPathname, hostname, description, crc);
}