Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / ServiceModel / Dispatcher / WorkflowInstanceContextProvider.cs / 1305376 / WorkflowInstanceContextProvider.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.ServiceModel.Dispatcher { using System.Runtime; using System.Runtime.Diagnostics; using System.ServiceModel.Channels; using System.ServiceModel.Diagnostics; using System.Threading; using System.Workflow.Runtime; using System.Diagnostics.CodeAnalysis; using System.Diagnostics; class WorkflowInstanceContextProvider : DurableInstanceContextProvider { bool hasCheckedForExtension; WorkflowInstanceLifetimeManagerExtension instanceLifeTimeManager; ServiceHostBase serviceHostBase; WaitCallback workflowActivationCompleteCallback; WorkflowDefinitionContext workflowDefinitionContext; public WorkflowInstanceContextProvider(ServiceHostBase serviceHostBase, bool isPerCall, WorkflowDefinitionContext workflowDefinitionContext) : base(serviceHostBase, isPerCall) { if (workflowDefinitionContext == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("workflowDefinitionContext"); } this.workflowDefinitionContext = workflowDefinitionContext; this.serviceHostBase = serviceHostBase; this.workflowActivationCompleteCallback = Fx.ThunkCallback(new WaitCallback(this.OnWorkflowActivationCompleted)); } public WorkflowInstanceLifetimeManagerExtension InstanceLifeTimeManager { get { if (!hasCheckedForExtension) { this.instanceLifeTimeManager = this.serviceHostBase.Extensions.Find(); hasCheckedForExtension = true; } return this.instanceLifeTimeManager; } } public override InstanceContext GetExistingInstanceContext(Message message, IContextChannel channel) { InstanceContext instanceContext = base.GetExistingInstanceContext(message, channel); if (instanceContext != null && this.InstanceLifeTimeManager != null) { WorkflowDurableInstance workflowDurableInstance = instanceContext.Extensions.Find (); if (workflowDurableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString( SR2.RequiredInstanceContextExtensionNotFound, typeof(WorkflowDurableInstance).Name))); } this.InstanceLifeTimeManager.NotifyWorkflowActivationComplete( workflowDurableInstance.InstanceId, this.workflowActivationCompleteCallback, new WorkflowActivationCompletedCallbackState ( workflowDurableInstance.InstanceId, instanceContext), false); } return instanceContext; } public override void InitializeInstanceContext(InstanceContext instanceContext, Message message, IContextChannel channel) { base.InitializeInstanceContext(instanceContext, message, channel); WorkflowDurableInstance workflowDurableInstance = instanceContext.Extensions.Find (); if (workflowDurableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString( SR2.RequiredInstanceContextExtensionNotFound, typeof(WorkflowDurableInstance).Name))); } if (this.InstanceLifeTimeManager != null) { this.InstanceLifeTimeManager.NotifyWorkflowActivationComplete(workflowDurableInstance.InstanceId, this.workflowActivationCompleteCallback, new WorkflowActivationCompletedCallbackState (workflowDurableInstance.InstanceId, instanceContext), false); } } public override bool IsIdle(InstanceContext instanceContext) { if (instanceContext == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("instanceContext"); } WorkflowDurableInstance workflowDurableInstance = instanceContext.Extensions.Find (); if (workflowDurableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString( SR2.RequiredInstanceContextExtensionNotFound, typeof(WorkflowDurableInstance).Name))); } if (this.InstanceLifeTimeManager != null) { return (!this.InstanceLifeTimeManager.IsInstanceInMemory(workflowDurableInstance.InstanceId)) && base.IsIdle(instanceContext); } return base.IsIdle(instanceContext); } public override void NotifyIdle(InstanceContextIdleCallback callback, InstanceContext instanceContext) { WorkflowDurableInstance workflowDurableInstance = instanceContext.Extensions.Find (); if (workflowDurableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString( SR2.RequiredInstanceContextExtensionNotFound, typeof(WorkflowDurableInstance).Name))); } if (this.InstanceLifeTimeManager != null) { if (this.InstanceLifeTimeManager.IsInstanceInMemory(workflowDurableInstance.InstanceId)) { this.InstanceLifeTimeManager.NotifyWorkflowActivationComplete(workflowDurableInstance.InstanceId, Fx.ThunkCallback(new WaitCallback(this.OnWorkflowActivationCompleted)), new WorkflowActivationCompletedCallbackState ( workflowDurableInstance.InstanceId, instanceContext, callback), true); } else { if (base.IsIdle(instanceContext)) { callback(instanceContext); } else { base.NotifyIdle(callback, instanceContext); } } } else { base.NotifyIdle(callback, instanceContext); } } protected override DurableInstance OnCreateNewInstance(Guid instanceId) { if (DiagnosticUtility.ShouldTraceInformation) { string traceText = SR2.GetString(SR2.InstanceContextProviderCreatedNewInstance, "Workflow", instanceId); TraceUtility.TraceEvent(TraceEventType.Information, TraceCode.ActivatingMessageReceived, SR.GetString(SR.TraceCodeActivatingMessageReceived), new StringTraceRecord("NewInstanceDetail", traceText), this, null); } return new WorkflowDurableInstance(this, instanceId, this.workflowDefinitionContext, true); } protected override DurableInstance OnGetExistingInstance(Guid instanceId) { return new WorkflowDurableInstance(this, instanceId, this.workflowDefinitionContext, false); } void OnWorkflowActivationCompleted(object state) { WorkflowActivationCompletedCallbackState callbackState = (WorkflowActivationCompletedCallbackState) state; lock (callbackState.InstanceContext.ThisLock) { if (base.Cache.Contains(callbackState.InstanceId, callbackState.InstanceContext)) { WorkflowDurableInstance durableInstance = callbackState.InstanceContext.Extensions.Find (); if (durableInstance != null && durableInstance.CurrentOperationInvocation != null && durableInstance.CurrentOperationInvocation.HasWorkflowRequestContextBeenSerialized && !durableInstance.CurrentOperationInvocation.IsCompleted) { // If we are here, it means the workflow instance completed, terminated, or otherwise unloaded without // completing the current operation invocation. In such case, we want to make the best effort to let // service model to consider this operation invocation failed. try { durableInstance.CurrentOperationInvocation.SendFault( WorkflowOperationErrorHandler.CreateUnhandledException( new InvalidOperationException(SR2.GetString(SR2.WorkflowServiceUnloadedWithoutSendingResponse))), null); } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } } } IChannel[] incomingChannels = new IChannel[callbackState.InstanceContext.IncomingChannels.Count]; callbackState.InstanceContext.IncomingChannels.CopyTo(incomingChannels, 0); if (callbackState.InstanceContext.IncomingChannels.Count != 0) { foreach (IChannel channel in incomingChannels) { callbackState.InstanceContext.IncomingChannels.Remove(channel); } } else { //Call notify only when IncomingChannels Collection is empty. if (callbackState.InstanceContextIdleCallback != null) { callbackState.InstanceContextIdleCallback(callbackState.InstanceContext); } } } } } class WorkflowActivationCompletedCallbackState { InstanceContext instanceContext; InstanceContextIdleCallback instanceContextIdleCallback; Guid instanceId; public WorkflowActivationCompletedCallbackState(Guid instanceId, InstanceContext instanceContext) : this(instanceId, instanceContext, null) { } public WorkflowActivationCompletedCallbackState(Guid instanceId, InstanceContext instanceContext, InstanceContextIdleCallback callback) { this.instanceId = instanceId; this.instanceContext = instanceContext; this.instanceContextIdleCallback = callback; } public InstanceContext InstanceContext { get { return this.instanceContext; } } public InstanceContextIdleCallback InstanceContextIdleCallback { get { return this.instanceContextIdleCallback; } } public Guid InstanceId { get { return this.instanceId; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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