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

This example Akka source code file (MembershipChangeListenerExitingSpec.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

a, actor, akka, concurrent, currentclusterstate, exiting, memberexited, membershipchangelistenerexitingmultijvmnode1, membershipchangelistenerexitingmultijvmspec, membershipchangelistenerexitingspec, multinodeclusterspec, test, testing, testlatch, time

The MembershipChangeListenerExitingSpec.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */
package akka.cluster

import scala.collection.immutable.SortedSet
import org.scalatest.BeforeAndAfter
import com.typesafe.config.ConfigFactory
import akka.remote.testkit.MultiNodeConfig
import akka.remote.testkit.MultiNodeSpec
import akka.testkit._
import scala.concurrent.duration._
import akka.actor.Props
import akka.actor.Actor
import akka.cluster.MemberStatus._
import akka.actor.Deploy

object MembershipChangeListenerExitingMultiJvmSpec extends MultiNodeConfig {
  val first = role("first")
  val second = role("second")
  val third = role("third")

  commonConfig(debugConfig(on = false).withFallback(MultiNodeClusterSpec.clusterConfigWithFailureDetectorPuppet))
}

class MembershipChangeListenerExitingMultiJvmNode1 extends MembershipChangeListenerExitingSpec
class MembershipChangeListenerExitingMultiJvmNode2 extends MembershipChangeListenerExitingSpec
class MembershipChangeListenerExitingMultiJvmNode3 extends MembershipChangeListenerExitingSpec

abstract class MembershipChangeListenerExitingSpec
  extends MultiNodeSpec(MembershipChangeListenerExitingMultiJvmSpec)
  with MultiNodeClusterSpec {

  import MembershipChangeListenerExitingMultiJvmSpec._
  import ClusterEvent._

  "A registered MembershipChangeListener" must {
    "be notified when new node is EXITING" taggedAs LongRunningTest in {

      awaitClusterUp(first, second, third)

      runOn(first) {
        enterBarrier("registered-listener")
        cluster.leave(second)
      }

      runOn(second) {
        val exitingLatch = TestLatch()
        val removedLatch = TestLatch()
        val secondAddress = address(second)
        cluster.subscribe(system.actorOf(Props(new Actor {
          def receive = {
            case state: CurrentClusterState ⇒
              if (state.members.exists(m ⇒ m.address == secondAddress && m.status == Exiting))
                exitingLatch.countDown()
            case MemberExited(m) if m.address == secondAddress ⇒
              exitingLatch.countDown()
            case MemberRemoved(m, Exiting) if m.address == secondAddress ⇒
              removedLatch.countDown()
            case _ ⇒ // ignore
          }
        }).withDeploy(Deploy.local)), classOf[MemberEvent])
        enterBarrier("registered-listener")
        exitingLatch.await
        removedLatch.await
      }

      runOn(third) {
        val exitingLatch = TestLatch()
        val secondAddress = address(second)
        cluster.subscribe(system.actorOf(Props(new Actor {
          def receive = {
            case state: CurrentClusterState ⇒
              if (state.members.exists(m ⇒ m.address == secondAddress && m.status == Exiting))
                exitingLatch.countDown()
            case MemberExited(m) if m.address == secondAddress ⇒
              exitingLatch.countDown()
            case _ ⇒ // ignore
          }
        }).withDeploy(Deploy.local)), classOf[MemberEvent])
        enterBarrier("registered-listener")
        exitingLatch.await
      }

      enterBarrier("finished")
    }
  }
}

Other Akka source code examples

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

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