Hi Jakub,
On Fri, May 29, 2015 at 11:36 AM, Jakub Liska <[email protected]> wrote:
> Hey,
>
> I have a Source that merges ActorPublishers, this is a simplification :
>
> Source[Foo]() { implicit b =>
> val actorSources = myActorPublisherArray
> b.add(Merge[Foo](actorSources.length))
> for (i <- 0 until actorSources.length) {
> b.addEdge(b.add(actorSources(i)), merge.in(i))
> }
> merge.out
> }
> }
>
>
>
> class MyActorPublisher extends ActorPublisher[Foo] {
> var batchIterator = someBlockingIterator
>
>
> def pushNext: Boolean = {
> if (batchIterator.hasNext) {
>
> val nextMnfResource = batchIterator.next()
> onNext(nextMnfResource)
> true
> } else {
> onCompleteThenStop()
> false
> }
> }
> def receive: Receive = {
> case Request(n) if totalDemand > 0 && isActive =>
> (1L to Math.min(n, totalDemand)).foldLeft(true) {
>
What is the above line intending to do? Why are you taking a minimum of n
and totalDemand? Why are you not using totalDemand directly?
>
> case (acc,i) => if (acc) pushNext else false
> }
> case Cancel =>
> context.stop(self)
> }
> }
>
>
>
> But the stream is idling most of the time with like 1% CPU usage like
> there was no `pull demand` for some reason... I'm trying to reproduce it
> and find the catch for 2 days already.
>
> Any idea why that could be? I think it started with RC1 or RC2 when I set
> Flow#mapAsync(parallelism) as required in following Flows, I removed all
> custom "Stages" and I don't really do anything except Map and MapAsync in
> flows...
>
> Also it doesn't seem to be happening with
>
> .withInputBuffer (
> initialSize = 1,
> maxSize = 1
> )
>
>
> But then the throughtput is insufficient...
>
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>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
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