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Akka/Scala example source code file (ListenerSpec.scala)

This example Akka source code file (ListenerSpec.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, akka, akkaspec, atomicinteger, concurrent, list, listen, listener, listeners, listenerspec, route, router, routing, test, testing, testlatch, withlisteners

The ListenerSpec.scala Akka example source code

package akka.actor.routing

import akka.testkit._
import akka.actor._
import akka.actor.Actor._
import akka.routing._
import java.util.concurrent.atomic.AtomicInteger
import scala.concurrent.Await

@org.junit.runner.RunWith(classOf[org.scalatest.junit.JUnitRunner])
class ListenerSpec extends AkkaSpec {

  "Listener" must {

    "listen" in {
      val fooLatch = TestLatch(2)
      val barLatch = TestLatch(2)
      val barCount = new AtomicInteger(0)

      val broadcast = system.actorOf(Props(new Actor with Listeners {
        def receive = listenerManagement orElse {
          case "foo" ⇒ gossip("bar")
        }
      }))

      def newListener = system.actorOf(Props(new Actor {
        def receive = {
          case "bar" ⇒
            barCount.incrementAndGet
            barLatch.countDown()
          case "foo" ⇒
            fooLatch.countDown()
        }
      }))

      val a1 = newListener
      val a2 = newListener
      val a3 = newListener

      broadcast ! Listen(a1)
      broadcast ! Listen(a2)
      broadcast ! Listen(a3)

      broadcast ! Deafen(a3)

      broadcast ! WithListeners(_ ! "foo")
      broadcast ! "foo"

      Await.ready(barLatch, TestLatch.DefaultTimeout)
      barCount.get should be(2)

      Await.ready(fooLatch, TestLatch.DefaultTimeout)

      for (a ← List(broadcast, a1, a2, a3)) system.stop(a)
    }
  }
}

Other Akka source code examples

Here is a short list of links related to this Akka ListenerSpec.scala source code file:

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