Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / ServiceModel / Dispatcher / ServiceOperationInvoker.cs / 1305376 / ServiceOperationInvoker.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.ServiceModel.Dispatcher { using System; using System.Diagnostics.CodeAnalysis; using System.Runtime; using System.ServiceModel.Description; using System.ServiceModel.Diagnostics; class ServiceOperationInvoker : IOperationInvoker { bool canCreateInstance; bool completesInstance; bool contractCausesSave; IOperationInvoker innerInvoker; public ServiceOperationInvoker(IOperationInvoker innerInvoker, bool completesInstance, bool canCreateInstance, bool contractCausesSave) { if (innerInvoker == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("innerInvoker"); } this.innerInvoker = innerInvoker; this.completesInstance = completesInstance; this.canCreateInstance = canCreateInstance; this.contractCausesSave = contractCausesSave; } public bool IsSynchronous { get { return this.innerInvoker.IsSynchronous; } } public object[] AllocateInputs() { return this.innerInvoker.AllocateInputs(); } public object Invoke(object instance, object[] inputs, out object[] outputs) { if (instance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("instance"); } ServiceDurableInstance durableInstance = instance as ServiceDurableInstance; if (durableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString(SR2.InvokeCalledWithWrongType, typeof(DurableServiceAttribute).Name))); } object serviceInstance = durableInstance.StartOperation(this.canCreateInstance); Exception operationException = null; bool failFast = false; try { return this.innerInvoker.Invoke(serviceInstance, inputs, out outputs); } catch (Exception e) { if (Fx.IsFatal(e)) { failFast = true; throw; } operationException = e; ServiceErrorHandler.MarkException(e); throw; } finally { if (!failFast) { durableInstance.FinishOperation(this.completesInstance, this.contractCausesSave, operationException); } } } public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state) { if (instance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("instance"); } ServiceDurableInstance durableInstance = instance as ServiceDurableInstance; if (durableInstance == null) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new InvalidOperationException( SR2.GetString(SR2.InvokeCalledWithWrongType, typeof(DurableServiceAttribute).Name))); } return new InvokeAsyncResult(durableInstance, inputs, this, this.canCreateInstance, callback, state); } public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result) { return InvokeAsyncResult.End(out outputs, result); } public class InvokeAsyncResult : AsyncResult { static AsyncCallback finishCallback = Fx.ThunkCallback(new AsyncCallback(FinishComplete)); static AsyncCallback invokeCallback = Fx.ThunkCallback(new AsyncCallback(InvokeComplete)); static AsyncCallback startCallback = Fx.ThunkCallback(new AsyncCallback(StartComplete)); Exception completionException; ServiceDurableInstance durableInstance; object[] inputs; ServiceOperationInvoker invoker; OperationContext operationContext; object[] outputs; object returnValue; object serviceInstance; public InvokeAsyncResult(ServiceDurableInstance instance, object[] inputs, ServiceOperationInvoker invoker, bool canCreateInstance, AsyncCallback callback, object state) : base(callback, state) { this.invoker = invoker; this.inputs = inputs; this.durableInstance = instance; this.operationContext = OperationContext.Current; IAsyncResult result = this.durableInstance.BeginStartOperation(canCreateInstance, startCallback, this); if (result.CompletedSynchronously) { this.serviceInstance = this.durableInstance.EndStartOperation(result); if (DoInvoke()) { Complete(true, this.completionException); } } } public static object End(out object[] outputs, IAsyncResult result) { InvokeAsyncResult invokeResult = AsyncResult.End(result); outputs = invokeResult.outputs; return invokeResult.returnValue; } // We pass the exception to another thread [SuppressMessage("Reliability", "Reliability104")] [SuppressMessage("Microsoft.Design", "CA1031")] static void FinishComplete(IAsyncResult result) { if (result.CompletedSynchronously) { return; } InvokeAsyncResult invokeResult = result.AsyncState as InvokeAsyncResult; Fx.Assert(invokeResult != null, "Async state should have been of type InvokeAsyncResult."); try { invokeResult.durableInstance.EndFinishOperation(result); } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } invokeResult.completionException = e; } invokeResult.Complete(false, invokeResult.completionException); } // We pass the exception to another thread [SuppressMessage("Reliability", "Reliability104")] [SuppressMessage("Microsoft.Design", "CA1031")] static void InvokeComplete(IAsyncResult resultParameter) { if (resultParameter.CompletedSynchronously) { return; } InvokeAsyncResult invokeResult = resultParameter.AsyncState as InvokeAsyncResult; Fx.Assert(invokeResult != null, "Async state should have been of type InvokeAsyncResult."); try { invokeResult.returnValue = invokeResult.invoker.innerInvoker.InvokeEnd(invokeResult.serviceInstance, out invokeResult.outputs, resultParameter); } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } ServiceErrorHandler.MarkException(e); invokeResult.completionException = e; } finally { if (invokeResult.DoFinish()) { invokeResult.Complete(false, invokeResult.completionException); } } } // We pass the exception to another thread [SuppressMessage("Reliability", "Reliability104")] [SuppressMessage("Microsoft.Design", "CA1031")] static void StartComplete(IAsyncResult resultParameter) { if (resultParameter.CompletedSynchronously) { return; } InvokeAsyncResult invokeResult = resultParameter.AsyncState as InvokeAsyncResult; Fx.Assert(invokeResult != null, "Async state should have been of type InvokeAsyncResult."); try { invokeResult.serviceInstance = invokeResult.durableInstance.EndStartOperation(resultParameter); } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } invokeResult.Complete(false, e); return; } if (invokeResult.DoInvoke()) { invokeResult.Complete(false, invokeResult.completionException); } } // We pass the exception to another thread [SuppressMessage("Reliability", "Reliability104")] [SuppressMessage("Microsoft.Design", "CA1031")] bool DoFinish() { try { IAsyncResult result = this.durableInstance.BeginFinishOperation(this.invoker.completesInstance, this.invoker.contractCausesSave, this.completionException, finishCallback, this); if (result.CompletedSynchronously) { this.durableInstance.EndFinishOperation(result); return true; } } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } this.completionException = e; return true; } return false; } // We pass the exception to another thread [SuppressMessage("Reliability", "Reliability104")] [SuppressMessage("Microsoft.Design", "CA1031")] bool DoInvoke() { bool finishNow = false; try { IAsyncResult result = null; using (OperationContextScope operationScope = new OperationContextScope(this.operationContext)) { result = this.invoker.innerInvoker.InvokeBegin(this.serviceInstance, this.inputs, invokeCallback, this); } if (result.CompletedSynchronously) { this.returnValue = this.invoker.innerInvoker.InvokeEnd(this.serviceInstance, out this.outputs, result); finishNow = true; } } catch (Exception e) { if (Fx.IsFatal(e)) { throw; } ServiceErrorHandler.MarkException(e); this.completionException = e; finishNow = true; } if (finishNow) { if (DoFinish()) { return true; } } return false; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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