public CompleteAsyncCodeActivityWorkItem(AsyncOperationContext asyncContext, ActivityInstance instance, IAsyncResult result)
: base(instance)
{
_result = result;
_asyncContext = asyncContext;
this.ExitNoPersistRequired = true;
}
internal static void CompleteAsynchronousExecution(IAsyncResult result)
{
if (result.CompletedSynchronously)
{
return;
}
AsyncOperationContext asyncContext = result.AsyncState as AsyncOperationContext;
// User code may not have correctly passed the AsyncOperationContext thru as the "state" parameter for
// BeginInvoke. If is null, don't bother going any further. We would have thrown an exception out of the
// workflow from InternalExecute. In that case, AsyncOperationContext.CancelOperation will be called in
// InternalExecute.
if (asyncContext != null)
{
asyncContext.CompleteAsyncCodeActivity(new CompleteAsyncCodeActivityData(asyncContext, result));
}
}
sealed internal override void InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)
{
// first set up an async context
AsyncOperationContext asyncContext = executor.SetupAsyncOperationBlock(instance);
instance.IncrementBusyCount();
AsyncCodeActivityContext context = new AsyncCodeActivityContext(asyncContext, instance, executor);
bool success = false;
try
{
IAsyncResult result = BeginExecute(context, AsyncCodeActivity.OnExecuteComplete, asyncContext);
if (result == null)
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.AsError(new InvalidOperationException(SR.BeginExecuteMustNotReturnANullAsyncResult));
}
if (!object.ReferenceEquals(result.AsyncState, asyncContext))
{
throw Microsoft.CoreWf.Internals.FxTrace.Exception.AsError(new InvalidOperationException(SR.BeginExecuteMustUseProvidedStateAsAsyncResultState));
}
if (result.CompletedSynchronously)
{
EndExecute(context, result);
asyncContext.CompleteOperation();
}
success = true;
}
finally
{
context.Dispose();
if (!success)
{
asyncContext.CancelOperation();
}
}
}
protected CompleteData(AsyncOperationContext context, bool isCancel)
{
Fx.Assert(context != null, "Cannot have a null context.");
_context = context;
_isCancel = isCancel;
}
internal AsyncCodeActivityContext(AsyncOperationContext asyncContext, ActivityInstance instance, ActivityExecutor executor)
: base(instance, executor)
{
_asyncContext = asyncContext;
}
public CompleteAsyncCodeActivityData(AsyncOperationContext context, IAsyncResult result)
: base(context, false)
{
_result = result;
}
