/// <summary>
/// Resolve task safe
/// </summary>
private void InitNextTask()
{
//try get next task
try
{
IPandaTask continuationPandaTask = _nextActionDelegate();
//no task resolved
if (continuationPandaTask != null)
{
_state = ContinuationTaskState.WaitSecondComplete;
continuationPandaTask.Done(HandleTaskCompleted).Fail(HandleTaskFailed);
}
else
{
RejectInternal(new NullReferenceException(@"Continuation callback returns null task!"));
}
}
catch (Exception ex)
{
if (Status != PandaTaskStatus.Pending)
{
throw;
}
//reject on non system exceptions
RejectInternal(ex);
}
}
internal ContinuationTaskFromPandaTask(IPandaTask currentPandaTask, Func <IPandaTask> nextAction, bool fromCatch = false)
{
//check - set
if (currentPandaTask == null)
{
throw new ArgumentNullException(nameof(currentPandaTask));
}
FromCatch = fromCatch;
_nextActionDelegate = nextAction ?? throw new ArgumentNullException(nameof(nextAction));
//start listen task.
switch (Status)
{
case PandaTaskStatus.Pending: currentPandaTask.Done(HandleTaskCompleted).Fail(HandleTaskFailed); break;
//no allocations for completed tasks
case PandaTaskStatus.Rejected: HandleTaskFailed(currentPandaTask.Error); break;
case PandaTaskStatus.Resolved: HandleTaskCompleted(); break;
}
}
public void OnCompleted(Action continuation)
{
_task.Done(continuation).Fail(_ => continuation());
}
