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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.Workflow.Runtime;
using System.Runtime.Diagnostics;
using System.ServiceModel.Diagnostics;
using System.Diagnostics;
class WorkflowDurableInstance : DurableInstance
{
WorkflowOperationAsyncResult currentOperationInvocation;
WorkflowInstanceContextProvider instanceContextProvider;
bool shouldCreateNew = false;
object thisLock = new object();
WorkflowDefinitionContext workflowDefinition;
WorkflowInstance workflowInstance = null;
public WorkflowDurableInstance(WorkflowInstanceContextProvider instanceContextProvider, Guid instanceId, WorkflowDefinitionContext workflowDefinition, bool createNew)
:
base(instanceContextProvider, instanceId)
{
if (workflowDefinition == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("workflowDefinition");
}
this.workflowDefinition = workflowDefinition;
this.shouldCreateNew = createNew;
this.instanceContextProvider = instanceContextProvider;
}
public WorkflowOperationAsyncResult CurrentOperationInvocation
{
get
{
return this.currentOperationInvocation;
}
set
{
this.currentOperationInvocation = value;
}
}
public WorkflowInstance GetWorkflowInstance(bool canCreateInstance)
{
if (this.workflowInstance == null)
{
lock (thisLock)
{
if (shouldCreateNew)
{
if (canCreateInstance)
{
this.workflowInstance = this.workflowDefinition.CreateWorkflow(this.InstanceId);
shouldCreateNew = false;
if (DiagnosticUtility.ShouldTraceInformation)
{
string traceText = SR.GetString(SR.TraceCodeWorkflowDurableInstanceActivated, InstanceId);
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.WorkflowDurableInstanceActivated, traceText,
new StringTraceRecord("DurableInstanceDetail", traceText),
this, null);
}
using (new WorkflowDispatchContext(true, true))
{
this.workflowInstance.Start();
}
}
else
{
//Make sure we clean up this InstanceContext;
DurableErrorHandler.CleanUpInstanceContextAtOperationCompletion();
//Inform InstanceLifeTimeManager to clean up record for InstanceId;
if (this.instanceContextProvider.InstanceLifeTimeManager != null)
{
this.instanceContextProvider.InstanceLifeTimeManager.CleanUp(this.InstanceId);
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FaultException(new DurableDispatcherAddressingFault()));
}
}
else
{
this.workflowInstance = this.workflowDefinition.WorkflowRuntime.GetWorkflow(InstanceId);
if (DiagnosticUtility.ShouldTraceInformation)
{
string traceText = SR.GetString(SR.TraceCodeWorkflowDurableInstanceLoaded, InstanceId);
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.WorkflowDurableInstanceLoaded, traceText,
new StringTraceRecord("DurableInstanceDetail", traceText),
this, null);
}
}
}
}
return workflowInstance;
}
}
}
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