public override IAsyncResult BeginExecute(ControllerContext controllerContext, IDictionary<string, object> parameters, AsyncCallback callback, object state) { if (controllerContext == null) { throw new ArgumentNullException("controllerContext"); } if (parameters == null) { throw new ArgumentNullException("parameters"); } AsyncManager asyncHelper = GetAsyncManager(controllerContext.Controller); SingleEntryGate setupCompletedGate = new SingleEntryGate(); BeginInvokeCallback beginCallback = (innerCallback, innerState) => { ManualAsyncResult asyncResult = new ManualAsyncResult() { AsyncState = innerState }; // Get parameters for async setup method, then execute ParameterInfo[] setupParametersInfos = SetupMethod.GetParameters(); var rawSetupParameterValues = from parameterInfo in setupParametersInfos select ExtractParameterFromDictionary(parameterInfo, parameters, SetupMethod); object[] setupParametersArray = rawSetupParameterValues.ToArray(); // to simplify the logic, force an asynchronous callback asyncHelper.OutstandingOperations.Completed += delegate { if (setupCompletedGate.TryEnter()) { ThreadPool.QueueUserWorkItem(o => { asyncResult.MarkCompleted(false /* completedSynchronously */, innerCallback); }); } }; MethodDispatcher setupDispatcher = DispatcherCache.GetDispatcher(SetupMethod); asyncHelper.OutstandingOperations.Increment(); setupDispatcher.Execute(controllerContext.Controller, setupParametersArray); asyncHelper.OutstandingOperations.Decrement(); return asyncResult; }; AsyncCallback<object> endCallback = ar => { if (setupCompletedGate.TryEnter()) { // the setup method did not complete before this callback executed throw new InvalidOperationException(MvcResources.AsyncActionDescriptor_EndExecuteCalledPrematurely); } // Get parameters for action method, then execute ParameterInfo[] completionParametersInfos = CompletionMethod.GetParameters(); var rawCompletionParameterValues = from parameterInfo in completionParametersInfos select ExtractParameterOrDefaultFromDictionary(parameterInfo, asyncHelper.Parameters); object[] completionParametersArray = rawCompletionParameterValues.ToArray(); MethodDispatcher completionDispatcher = DispatcherCache.GetDispatcher(CompletionMethod); object actionReturnValue = completionDispatcher.Execute(controllerContext.Controller, completionParametersArray); return actionReturnValue; }; // Set the timeout and go int timeout = asyncHelper.Timeout; return AsyncResultWrapper.WrapWithTimeout(callback, state, beginCallback, endCallback, timeout, _executeTag); }
public WrappedAsyncResult(BeginInvokeDelegate beginDelegate, EndInvokeDelegate <TResult> endDelegate, object tag) { _beginDelegateLockObj = new object(); _endExecutedGate = new SingleEntryGate(); _handleCallbackGate = new SingleEntryGate(); _beginDelegate = beginDelegate; _endDelegate = endDelegate; _tag = tag; }
public WrappedTaskCompletionSource(int timeoutMs, string sourceId, Action <string> callback) { taskCompletionSource = new TaskCompletionSource <T1>(); setResultGate = new SingleEntryGate(); this.sourceId = sourceId; this.callback = callback; if (timeoutMs > 0) { timer = new Timer(HandleTimeout, null, timeoutMs, Timeout.Infinite); } }
public void TryEnterShouldBeTrueForFirstCallAndFalseForSubsequentCalls() { // Arrange SingleEntryGate gate = new SingleEntryGate(); // Act bool firstCall = gate.TryEnter(); bool secondCall = gate.TryEnter(); bool thirdCall = gate.TryEnter(); // Assert Assert.True(firstCall); Assert.False(secondCall); Assert.False(thirdCall); }
public void TryEnter() { // Arrange SingleEntryGate gate = new SingleEntryGate(); // Act bool firstCall = gate.TryEnter(); bool secondCall = gate.TryEnter(); bool thirdCall = gate.TryEnter(); // Assert Assert.IsTrue(firstCall, "TryEnter() should return TRUE on first call."); Assert.IsFalse(secondCall, "TryEnter() should return FALSE on each subsequent call."); Assert.IsFalse(thirdCall, "TryEnter() should return FALSE on each subsequent call."); }
protected ControllerBase() { _executeGate = new SingleEntryGate(); }