That was it. Good to know. Thanks.
-matthew
On Tuesday, February 23, 2016 at 11:13:37 AM UTC-6, Konrad Malawski wrote:
>
> Because Akka uses non-daemonic threads, so it'll keep the app running
> until you shut-down the ActorSystem.
>
> You can do so via:
>
> import system.dispatcher
> s.runForeach(println).onComplete { _ => system.terminate() }
>
> --
> Cheers,
> Konrad 'ktoso’ Malawski
> <http://akka.io>Akka <http://akka.io> @ Lightbend <http://typesafe.com>
> <http://lightbend.com>
>
> On 23 February 2016 at 18:11:36, Matthew Adams ([email protected]
> <javascript:>) wrote:
>
> * NB: posted
> at
> http://stackoverflow.com/questions/35583739/why-does-this-simple-akka-streams-program-never-terminate
>
> <http://stackoverflow.com/questions/35583739/why-does-this-simple-akka-streams-program-never-terminate>
>
> before I thought to post here.*
>
> Should be a simple question. I'm using Akka 2.4.2 (contains Akka Streams &
> HTTP). I expected this Source to complete & the program to terminate
> because the Source is finite, but it never does. Why doesn't this program
> terminate?
>
> import scala.concurrent._
> import scala.collection.immutable._
> import akka._
> import akka.actor._
> import akka.stream._
> import akka.stream.scaladsl._
> import akka.util._
>
> object Test extends App {
>
> implicit val system = ActorSystem("TestSystem")
> implicit val materializer = ActorMaterializer()
>
> val s = Source.single(1)
> s.runForeach(println)
> }
>
> Output:
>
> $ sbt run
> ...
> [info] Running Test
> [DEBUG] [02/23/2016 10:59:19.904] [run-main-0]
> [EventStream(akka://TestSystem)] logger log1-Logging$DefaultLogger started
> [DEBUG] [02/23/2016 10:59:19.904] [run-main-0]
> [EventStream(akka://TestSystem)] Default Loggers started
> 1
>
> Relevant portion of my build.sbt file:
>
> scalaVersion := "2.11.7"
>
> scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")
>
> libraryDependencies ++= {
> val akkaVersion = "2.4.2"
> Seq(
> "com.typesafe.akka" %% "akka-stream" % akkaVersion
> )
> }
>
> -matthew
> --
> >>>>>>>>>> Read the docs: http://akka.io/docs/
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