private void HandOver(SubstreamHandler handler)
{
if (IsClosed(_stage._out))
{
CompleteStage();
}
else
{
_substreamSource = new SubSourceOutlet <T>(this, "SplitSource");
_substreamSource.SetHandler(handler);
_substreamCancelled = false;
SetHandler(_stage._in, handler);
SetKeepGoing(handler.HasInitialElement);
if (IsAvailable(_stage._out))
{
Push(_stage._out, Source.FromGraph(_substreamSource.Source));
ScheduleOnce(SubscriptionTimer, _timeout);
_substreamPushed = true;
}
else
{
_substreamPushed = false;
}
}
}
protected SubSourceOutlet <TIn> CreateSubOutlet(Inlet <TIn> inlet)
{
var sourceOut = new SubSourceOutlet <TIn>(this, $"RestartWithBackoff{_name}.subOut");
sourceOut.SetHandler(new LambdaOutHandler(
onPull: () =>
{
if (IsAvailable(In))
{
sourceOut.Push(Grab(In));
}
else
{
if (!HasBeenPulled(In))
{
Pull(In);
}
}
},
onDownstreamFinish: () =>
{
if (_finishing || MaxRestartsReached() || _onlyOnFailures)
{
Cancel(In);
}
else
{
Log.Debug("Graph in finished");
ScheduleRestartTimer();
}
}
));
SetHandler(In,
onPush: () =>
{
if (sourceOut.IsAvailable)
{
sourceOut.Push(Grab(In));
}
},
onUpstreamFinish: () =>
{
_finishing = true;
sourceOut.Complete();
},
onUpstreamFailure: ex =>
{
_finishing = true;
sourceOut.Fail(ex);
});
return(sourceOut);
}
private Source <T, NotUsed> OpenSubstream()
{
var timeout = ActorMaterializer.Downcast(Interpreter.Materializer).Settings.SubscriptionTimeoutSettings.Timeout;
_tailSource = new SubSourceOutlet <T>(this, "TailSource");
_tailSource.SetHandler(_subHandler);
SetKeepGoing(true);
ScheduleOnce(SubscriptionTimer, timeout);
_builder = null;
return(Source.FromGraph(_tailSource.Source));
}