private JobTaskResult RunAction(IEnumerable <Task <JobTaskResult> > parentTasks)
{
if (parentTasks.Any(x => x.Result.ActionCanceled))
{
State = JobState.ActionSkipped;
OnActionFailed?.Invoke(this, new JobFailedArgs {
Exception = new Exception("Skipped because one of parent tasks failed")
});
return(JobTaskResult.Failed());
}
var result = new JobTaskResult();
var withSemaphore = jobsContext.UseActionSemaphore;
if (withSemaphore)
{
State = JobState.ActionWaitForSemaphore;
jobsContext.ActionSemaphore.Wait();
}
try
{
OnActionExecuting?.Invoke(this, new JobArgs());
State = JobState.ActionExecuting;
Action(new JobActionFeed(result));
if (result.ActionCanceled)
{
state = JobState.ActionCanceled;
}
else
{
OnActionExecuted?.Invoke(this, new JobArgs());
state = JobState.ActionExecuted;
}
}
catch (Exception ex)
{
var args = new JobFailedArgs
{
Exception = ex
};
result.ActionCanceled = true;
OnActionFailed?.Invoke(this, args);
State = JobState.ActionFailed;
}
if (withSemaphore)
{
jobsContext.ActionSemaphore.Release();
}
return(result);
}
private JobTaskResult RunBackAction(IEnumerable <Task <JobTaskResult> > childTasks)
{
if (childTasks.Any(x => x.IsFaulted))
{
OnActionFailed?.Invoke(this, new JobFailedArgs {
Exception = new Exception("Skipped because one of the tasks failed")
});
////State = JobState.BackActionSkipped <- back action cannot be skipped when chld action fails
}
var withSemaphore = jobsContext.UseBackActionSemaphore;
if (withSemaphore)
{
State = JobState.BackActionWaitForSemaphore;
jobsContext.BackActionSemaphore.Wait();
}
try
{
OnBackActionExecuting?.Invoke(this, new JobArgs());
State = JobState.BackActionExecuting;
BackAction();
OnBackActionExecuted?.Invoke(this, new JobArgs());
State = JobState.BackActionExecuted;
}
catch (Exception ex)
{
OnBackActionFailed?.Invoke(this, new JobFailedArgs
{
Exception = ex
});
State = JobState.BackActionFailed;
}
if (withSemaphore)
{
jobsContext.BackActionSemaphore.Release();
}
return(new JobTaskResult());
}
public void Queue(T target, string uniqueKey, Action <T> action)
{
if (disposedValue)
{
throw new ObjectDisposedException(nameof(AsyncActionQueue <T>));
}
if (thread == null || !thread.IsAlive)
{
Thread localThread = null;
thread = localThread = new Thread(() =>
{
while (true)
{
lock (queue)
{
while (!enabled || queue.Count == 0)
{
if (thread != localThread)
{
Trace.WriteLine($"Stopping {localThread.Name} thread");
return;
}
Monitor.Wait(queue);
}
var startedTasks = new List <ActionContainer>();
lock (running)
foreach (var task in queue)
{
if (running.Contains(task.UniqueKey))
{
continue;
}
running.Add(task.UniqueKey);
startedTasks.Add(task);
var taskToRun = task;
ThreadPool.QueueUserWorkItem((state) =>
{
try
{
taskToRun.Action.Invoke(taskToRun.Target);
}
catch (Exception e)
{
var toUpdateTarget = taskToRun.Target;
Program.Schedule(() =>
{
if (OnActionFailed != null)
{
OnActionFailed.Invoke(toUpdateTarget, e);
}
else
{
Trace.WriteLine($"Action failed for '{taskToRun.Target}': {e}");
}
});
}
lock (running)
running.Remove(taskToRun.UniqueKey);
lock (queue)
if (queue.Count > 0)
{
Monitor.Pulse(queue);
}
});
}
foreach (var startedTask in startedTasks)
{
queue.Remove(startedTask);
}
}
}
})
{
Name = threadName, IsBackground = true,
};
Trace.WriteLine($"Starting {localThread.Name} thread");
thread.Start();
}
lock (queue)
{
if (!allowDuplicates)
{
foreach (var queued in queue)
{
if (queued.Target.Equals(target))
{
return;
}
}
}
queue.Add(new ActionContainer()
{
Target = target, UniqueKey = uniqueKey, Action = action
});
Monitor.Pulse(queue);
}
}
public virtual void OnRemove()
{
OnActionFailed?.Invoke();
state = States.Disabled;
}
protected void ActionFailure() => OnActionFailed?.Invoke();