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

This example Akka source code file (JoinInProgressSpec.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, akka, cluster, concurrent, joininprogressmultijvmnode1, joininprogressmultijvmnode2, joininprogressmultijvmspec, joininprogressspec, longrunningtest, multinodeclusterspec, multinodeconfig, multinodespec, test, testing, time

The JoinInProgressSpec.scala Akka example source code

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

import com.typesafe.config.ConfigFactory
import org.scalatest.BeforeAndAfter
import akka.remote.testkit.MultiNodeConfig
import akka.remote.testkit.MultiNodeSpec
import akka.testkit._
import scala.concurrent.duration._

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

  commonConfig(
    debugConfig(on = false)
      .withFallback(ConfigFactory.parseString("""
          akka.cluster {
            # simulate delay in gossip by turning it off
            gossip-interval = 300 s
            failure-detector {
              threshold = 4
              acceptable-heartbeat-pause = 1 second
            }
          }""")
        .withFallback(MultiNodeClusterSpec.clusterConfig)))
}

class JoinInProgressMultiJvmNode1 extends JoinInProgressSpec
class JoinInProgressMultiJvmNode2 extends JoinInProgressSpec

abstract class JoinInProgressSpec
  extends MultiNodeSpec(JoinInProgressMultiJvmSpec)
  with MultiNodeClusterSpec {

  import JoinInProgressMultiJvmSpec._

  "A cluster node" must {
    "send heartbeats immediately when joining to avoid false failure detection due to delayed gossip" taggedAs LongRunningTest in {

      runOn(first) {
        startClusterNode()
      }

      enterBarrier("first-started")

      runOn(second) {
        cluster.join(first)
      }

      runOn(first) {
        val until = Deadline.now + 5.seconds
        while (!until.isOverdue) {
          Thread.sleep(200)
          cluster.failureDetector.isAvailable(second) should be(true)
        }
      }

      enterBarrier("after")
    }
  }
}