private TransferPhase OpenSubstream(object element, object key)
{
return(new TransferPhase(PrimaryOutputs.NeedsDemandOrCancel, () =>
{
if (PrimaryOutputs.IsClosed)
{
// Just drop, we do not open any more substreams
NextPhase(_waitNext);
}
else
{
if (_keyToSubstreamOutput.Count == _maxSubstreams)
{
throw new IllegalStateException($"Cannot open substream for key '{key}': too many substreams open");
}
var substreamOutput = CreateSubstreamOutput();
var substreamFlow = Source.FromPublisher(substreamOutput);
PrimaryOutputs.EnqueueOutputElement(substreamFlow);
if (_keyToSubstreamOutput.ContainsKey(key))
{
_keyToSubstreamOutput[key] = substreamOutput;
}
else
{
_keyToSubstreamOutput.Add(key, substreamOutput);
}
NextPhase(DispatchToSubstream(element, substreamOutput));
}
}));
}
protected virtual void Fail(Exception e)
{
if (Settings.IsDebugLogging)
{
Log.Debug("Failed due to: {0}", e.Message);
}
PrimaryInputs.Cancel();
PrimaryOutputs.Error(e);
Context.Stop(Self);
}
protected override void PostStop()
{
PrimaryInputs.Cancel();
PrimaryOutputs.Error(new AbruptTerminationException(Self));
}
public virtual void PumpFinished()
{
PrimaryInputs.Cancel();
PrimaryOutputs.Complete();
Context.Stop(Self);
}