protected override IStream <TOut> CreateOutputStream(ToSubProcessesArgs <TIn, TOut> args)
{
// Semaphore semaphore = args.NoParallelisation ? new Semaphore(1, 1) : new Semaphore(10, 10);
Synchronizer synchronizer = new Synchronizer(args.NoParallelisation);
if (this.ExecutionContext is GetDefinitionExecutionContext)
{
var inputStream = new SingleStream <TIn>(new SubNodeWrapper(this), PushObservable.FromSingle(default(TIn), args.Stream.Observable.CancellationToken));
foreach (var subProcess in args.SubProcesses)
{
var outputStream = subProcess(inputStream);
this.ExecutionContext.AddNode(this, outputStream.Observable);
}
}
var outputObservable = args.Stream.Observable
.FlatMap((i, ct) => PushObservable.FromEnumerable(args.SubProcesses.Select(sp => new
{
config = i,
subProc = sp
}), ct))
.FlatMap((i, ct) =>
{
EventWaitHandle waitHandle = new EventWaitHandle(false, EventResetMode.ManualReset);
var inputStream = new SingleStream <TIn>(new SubNodeWrapper(this), PushObservable.FromSingle(i.config, waitHandle, ct));
var outputStream = i.subProc(inputStream);
IDisposable awaiter = null;
outputStream.Observable.Subscribe(j => { }, () => awaiter?.Dispose());
return(new DeferredWrapperPushObservable <TOut>(outputStream.Observable, () =>
{
awaiter = synchronizer.WaitBeforeProcess();
waitHandle.Set();
}, null, ct));
});
return(base.CreateUnsortedStream(outputObservable));
}
public ToSubProcessesStreamNode(string name, ToSubProcessesArgs <TIn, TOut> args) : base(name, args)
{
}