private void RunWebTaskWithContext(Func <IWebTaskActionContext, WebTaskResult> action, WebTask webTask)
{
WebTaskController controller = CreateAndStoreWebTaskController(webTask);
Task.Factory.StartNew <WebTaskResult>(RunWithContext, Tuple.Create(controller, action), controller.CancellationToken)
.ContinueWith(tpl => FinishWithContext(tpl));
}
private WebTaskController CreateAndStoreWebTaskController(WebTask webTask)
{
WebTaskController controller = new WebTaskController(webTask);
_taskControllers.TryAdd(webTask.Id, controller);
return(controller);
}
private void FinishWithContext(Task <WebTaskResult> tpl)
{
var conf = (Tuple <WebTaskController, Func <IWebTaskActionContext, WebTaskResult> >)tpl.AsyncState;
WebTaskController controller = conf.Item1;
SetWebTaskStateOnController(tpl, controller);
}
private WebTaskResult RunWithContext(object state)
{
var conf = (Tuple <WebTaskController, Func <IWebTaskActionContext, WebTaskResult> >)state;
WebTaskController controller = conf.Item1;
Func <IWebTaskActionContext, WebTaskResult> action = conf.Item2;
controller.Started();
WebTaskResult result = action(controller);
return(result);
}
private static void SetWebTaskStateOnController(Task <WebTaskResult> tpl, WebTaskController controller)
{
if (tpl.Status == TaskStatus.Faulted)
{
controller.Faulted(tpl.Exception.InnerException ?? tpl.Exception);
}
else if (tpl.Status == TaskStatus.Canceled)
{
controller.Canceled();
}
else if (tpl.IsCompleted)
{
controller.Completed(tpl.Result);
}
else
{
throw new InvalidOperationException();
}
}
