public override void OnPull()
{
var stop = false;
while (!stop)
{
try
{
var data = _stage._readData(_blockingStream);
if (data.HasValue)
{
Push(_stage.Out, data.Value);
}
else
{
CloseStage();
}
break;
}
catch (Exception ex)
{
var directive = _decider.Value(ex);
switch (directive)
{
case Directive.Stop:
_open = false;
_stage._close(_blockingStream);
FailStage(ex);
stop = true;
break;
case Directive.Restart:
RestartState();
break;
case Directive.Resume:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
}
public Logic(UnfoldResourceSource <TOut, TSource> source, Attributes inheritedAttributes) : base(source.Shape)
{
_source = source;
_inheritedAttributes = inheritedAttributes;
_decider = new Lazy <Decider>(() =>
{
var strategy = _inheritedAttributes.GetAttribute <ActorAttributes.SupervisionStrategy>(null);
return(strategy != null ? strategy.Decider : Deciders.StoppingDecider);
});
SetHandler(source.Out,
onPull: () =>
{
var stop = false;
while (!stop)
{
try
{
var data = source._readData(_blockingStream);
if (data.HasValue)
{
Push(source.Out, data.Value);
}
else
{
CloseStage();
}
break;
}
catch (Exception ex)
{
var directive = _decider.Value(ex);
switch (directive)
{
case Directive.Stop:
_source._close(_blockingStream);
FailStage(ex);
stop = true;
break;
case Directive.Restart:
RestartState();
break;
case Directive.Resume:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
},
onDownstreamFinish: CloseStage);
}
private void RestartState()
{
_source._close(_blockingStream);
_blockingStream = _source._create();
}