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

This example Akka source code file (NodeLeavingAndExitingSpec.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, collection, concurrent, currentclusterstate, exiting, leaving, multinodeclusterspec, multinodespec, nodeleavingandexitingmultijvmnode2, nodeleavingandexitingspec, test, testing, testlatch, time

The NodeLeavingAndExitingSpec.scala Akka example source code

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

import scala.collection.immutable.SortedSet
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 NodeLeavingAndExitingMultiJvmSpec extends MultiNodeConfig {
  val first = role("first")
  val second = role("second")
  val third = role("third")

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

class NodeLeavingAndExitingMultiJvmNode1 extends NodeLeavingAndExitingSpec
class NodeLeavingAndExitingMultiJvmNode2 extends NodeLeavingAndExitingSpec
class NodeLeavingAndExitingMultiJvmNode3 extends NodeLeavingAndExitingSpec

abstract class NodeLeavingAndExitingSpec
  extends MultiNodeSpec(NodeLeavingAndExitingMultiJvmSpec)
  with MultiNodeClusterSpec {

  import NodeLeavingAndExitingMultiJvmSpec._
  import ClusterEvent._

  "A node that is LEAVING a non-singleton cluster" must {

    "be moved to EXITING by the leader" taggedAs LongRunningTest in {

      awaitClusterUp(first, second, third)

      runOn(first, third) {
        val secondAddess = address(second)
        val exitingLatch = TestLatch()
        cluster.subscribe(system.actorOf(Props(new Actor {
          def receive = {
            case state: CurrentClusterState ⇒
              if (state.members.exists(m ⇒ m.address == secondAddess && m.status == Exiting))
                exitingLatch.countDown()
            case MemberExited(m) if m.address == secondAddess ⇒ exitingLatch.countDown()
            case _: MemberRemoved                             ⇒ // not tested here

          }
        }).withDeploy(Deploy.local)), classOf[MemberEvent])
        enterBarrier("registered-listener")

        runOn(third) {
          cluster.leave(second)
        }
        enterBarrier("second-left")

        // Verify that 'second' node is set to EXITING
        exitingLatch.await

      }

      // node that is leaving
      runOn(second) {
        enterBarrier("registered-listener")
        enterBarrier("second-left")
      }

      enterBarrier("finished")
    }
  }
}