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);
SingleFireEvent setupCompletedEvent = new SingleFireEvent();
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 (setupCompletedEvent.Signal()) {
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 (setupCompletedEvent.Signal()) {
// 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 void Signal() {
// Arrange
SingleFireEvent sfEvent = new SingleFireEvent();
// Act
bool firstCall = sfEvent.Signal();
bool secondCall = sfEvent.Signal();
// Assert
Assert.IsTrue(firstCall, "Signal() should return TRUE on first call.");
Assert.IsFalse(secondCall, "Signal() should return FALSE on each subsequent call.");
}
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);
SingleFireEvent setupCompletedEvent = new SingleFireEvent();
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 (setupCompletedEvent.Signal())
{
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 (setupCompletedEvent.Signal())
{
// 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));
}