Hi Alexander,
On Sat, Sep 5, 2015 at 7:28 PM, Alexander Semenov <[email protected]> wrote: > Hello dear community. > > Is it okay to wrap a blocking iterator when creating a Source? I have a > blocking API, which I want to hide behind the Source. Here is an example (I > suspect I might need to put blocking code on another executor, is this the > case?): > Yes, if you just use default dispatcher and put blocking code in a stream processing element (like a Source) then you take the risk of stalling the threadpool of the dispatcher. The solution is to assign a dedicated dispatcher for this blocking Source, so it cannot interfere with the rest of the actors: val mySafeSource = myBlockingSource.withAttributes(ActorAttributes.dispatcher("name-of-your-dispatcher-for-blocking-stuff")) -Endre > > object playground extends App { > > implicit val system = ActorSystem() > implicit val materializer = ActorMaterializer() > > val blockingIterator: Iterator[Int] = > new Iterator[Int] { > override def next(): Int = { > Thread.sleep(1000) > Random.nextInt(10) > } > override def hasNext: Boolean = true > } > > val source = Source(() => blockingIterator) > > source.runWith(Sink.foreach(println)) > > } > > > -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ > >>>>>>>>>> Check the FAQ: > http://doc.akka.io/docs/akka/current/additional/faq.html > >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- Akka Team Typesafe - Reactive apps on the JVM Blog: letitcrash.com Twitter: @akkateam -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
