public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result)
{
object returnVal;
bool callFailed = true;
bool callFaulted = false;
ServiceModelActivity activity = null;
if (instance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxNoServiceObject)));
}
try
{
Activity boundOperation = null;
AsyncMethodInvoker.GetActivityInfo(ref activity, ref boundOperation);
using (boundOperation)
{
Task task = result as Task;
Fx.Assert(task != null, "InvokeEnd needs to be called with the result returned from InvokeBegin.");
if (task.IsFaulted)
{
Fx.Assert(task.Exception != null, "Task.IsFaulted guarantees non-null exception.");
// If FaultException is thrown, we will get 'callFaulted' behavior below.
// Any other exception will retain 'callFailed' behavior.
throw FxTrace.Exception.AsError <FaultException>(task.Exception);
}
// Task cancellation without an exception indicates failure but we have no
// additional information to provide. Accessing Task.Result will throw a
// TaskCanceledException. For consistency between void Tasks and Task<T>,
// we detect and throw here.
if (task.IsCanceled)
{
throw FxTrace.Exception.AsError(new TaskCanceledException(task));
}
outputs = this.outputs;
if (this.isGenericTask)
{
returnVal = this.taskTResultGetMethod.Invoke(result, Type.EmptyTypes);
}
else
{
returnVal = null;
}
callFailed = false;
}
}
catch (SecurityException e)
{
DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(AuthorizationBehavior.CreateAccessDeniedFaultException());
}
catch (FaultException)
{
callFaulted = true;
callFailed = false;
throw;
}
finally
{
ServiceModelActivity.Stop(activity);
AsyncMethodInvoker.StopOperationInvokeTrace(callFailed, callFaulted, this.TaskMethod.Name);
AsyncMethodInvoker.StopOperationInvokePerformanceCounters(callFailed, callFaulted, this.TaskMethod.Name);
}
return(returnVal);
}
public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state)
{
if (instance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxNoServiceObject)));
}
if (inputs == null)
{
if (this.InputParameterCount > 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxInputParametersToServiceNull, this.InputParameterCount)));
}
}
else if (inputs.Length != this.InputParameterCount)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxInputParametersToServiceInvalid, this.InputParameterCount, inputs.Length)));
}
this.outputs = EmptyArray.Allocate(this.OutputParameterCount);
AsyncMethodInvoker.StartOperationInvokePerformanceCounters(this.taskMethod.Name);
IAsyncResult returnValue;
bool callFailed = true;
bool callFaulted = false;
ServiceModelActivity activity = null;
try
{
Activity boundActivity = null;
AsyncMethodInvoker.CreateActivityInfo(ref activity, ref boundActivity);
AsyncMethodInvoker.StartOperationInvokeTrace(this.taskMethod.Name);
using (boundActivity)
{
if (DiagnosticUtility.ShouldUseActivity)
{
string activityName = SR.GetString(SR.ActivityExecuteMethod, this.taskMethod.DeclaringType.FullName, this.taskMethod.Name);
ServiceModelActivity.Start(activity, activityName, ActivityType.ExecuteUserCode);
}
object taskReturnValue = this.InvokeDelegate(instance, inputs, this.outputs);
if (taskReturnValue == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("task");
}
else if (this.isGenericTask)
{
returnValue = (IAsyncResult)this.toAsyncMethodInfo.Invoke(null, new object[] { taskReturnValue, callback, state });
}
else
{
returnValue = ((Task)taskReturnValue).AsAsyncResult(callback, state);
}
callFailed = false;
}
}
catch (System.Security.SecurityException e)
{
DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(AuthorizationBehavior.CreateAccessDeniedFaultException());
}
catch (Exception e)
{
TraceUtility.TraceUserCodeException(e, this.taskMethod);
if (e is FaultException)
{
callFaulted = true;
callFailed = false;
}
throw;
}
finally
{
ServiceModelActivity.Stop(activity);
// Any exception above means InvokeEnd will not be called, so complete it here.
if (callFailed || callFaulted)
{
AsyncMethodInvoker.StopOperationInvokeTrace(callFailed, callFaulted, this.TaskMethod.Name);
AsyncMethodInvoker.StopOperationInvokePerformanceCounters(callFailed, callFaulted, this.TaskMethod.Name);
}
}
return(returnValue);
}
public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result)
{
if (instance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxNoServiceObject)));
}
object returnVal = null;
bool callFailed = true;
bool callFaulted = false;
ServiceModelActivity activity = null;
Activity boundOperation = null;
try
{
AsyncMethodInvoker.GetActivityInfo(ref activity, ref boundOperation);
Task <Tuple <object, object[]> > invokeTask = result as Task <Tuple <object, object[]> >;
if (invokeTask == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.SFxInvalidCallbackIAsyncResult));
}
AggregateException ae = null;
Tuple <object, object[]> tuple = null;
Task task = null;
if (invokeTask.IsFaulted)
{
Fx.Assert(invokeTask.Exception != null, "Task.IsFaulted guarantees non-null exception.");
ae = invokeTask.Exception;
}
else
{
Fx.Assert(invokeTask.IsCompleted, "Task.Result is expected to be completed");
tuple = invokeTask.Result;
task = tuple.Item1 as Task;
if (task == null)
{
outputs = tuple.Item2;
return(null);
}
if (task.IsFaulted)
{
Fx.Assert(task.Exception != null, "Task.IsFaulted guarantees non-null exception.");
ae = task.Exception;
}
}
if (ae != null && ae.InnerException != null)
{
if (ae.InnerException is FaultException)
{
// If invokeTask.IsFaulted we produce the 'callFaulted' behavior below.
// Any other exception will retain 'callFailed' behavior.
callFaulted = true;
callFailed = false;
}
if (ae.InnerException is SecurityException)
{
DiagnosticUtility.TraceHandledException(ae.InnerException, TraceEventType.Warning);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(AuthorizationBehavior.CreateAccessDeniedFaultException());
}
invokeTask.GetAwaiter().GetResult();
}
// Task cancellation without an exception indicates failure but we have no
// additional information to provide. Accessing Task.Result will throw a
// TaskCanceledException. For consistency between void Tasks and Task<T>,
// we detect and throw here.
if (task.IsCanceled)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new TaskCanceledException(task));
}
outputs = tuple.Item2;
returnVal = this.isGenericTask ? this.taskTResultGetMethod.Invoke(task, Type.EmptyTypes) : null;
callFailed = false;
return(returnVal);
}
finally
{
if (boundOperation != null)
{
((IDisposable)boundOperation).Dispose();
}
ServiceModelActivity.Stop(activity);
AsyncMethodInvoker.StopOperationInvokeTrace(callFailed, callFaulted, this.TaskMethod.Name);
AsyncMethodInvoker.StopOperationInvokePerformanceCounters(callFailed, callFaulted, this.TaskMethod.Name);
}
}