Created
September 26, 2016 18:29
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mapasyncunordered doesnt cap parallelism
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package sknil.flow.extract | |
import akka.actor.ActorSystem | |
import akka.stream.ActorMaterializer | |
import akka.stream.ActorMaterializerSettings | |
import akka.stream.scaladsl.Source | |
import scala.concurrent.Future | |
import java.util.concurrent.atomic.AtomicInteger | |
import akka.stream.scaladsl.Sink | |
import akka.stream.scaladsl.Flow | |
object MapAsyncTest { | |
val system = ActorSystem() | |
val threadCount = new AtomicInteger(0) | |
val threadCount2 = new AtomicInteger(0) | |
import system.dispatcher | |
private implicit val materializer = ActorMaterializer.create(ActorMaterializerSettings.create(system).withInputBuffer(1, 1),system) | |
val src = Source.repeat("x") | |
val flow = src.mapAsyncUnordered(5)(el => { | |
Future { | |
val cur = threadCount.incrementAndGet() | |
println("Thread Count:"+cur) | |
Thread.sleep(3000) | |
el | |
} | |
}) | |
val flow2 = Flow[String].mapAsyncUnordered(10)(x => Future { | |
val cur = threadCount2.incrementAndGet() | |
println("Thread Count2:"+cur) | |
Thread.sleep(3000) | |
x | |
}) | |
val sink = Sink.foreach[String] { x => threadCount.decrementAndGet();threadCount2.decrementAndGet(); } | |
val graph = flow.via(flow2).to(sink) | |
def main(args:Array[String]) { | |
graph.run() | |
} | |
} |
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