It is also possible to use s.c.blocking {}
On Tue, Sep 8, 2015 at 12:52 PM, Akka Team <[email protected]> wrote:
> 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))
>>
>> }
>>
>>
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>
>
>
> --
> Akka Team
> Typesafe - Reactive apps on the JVM
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>
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--
Cheers,
√
--
>>>>>>>>>> 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
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