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

This example Akka source code file (RemoteConsistentHashingRouterSpec.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, address, akka, akkaspec, c, consistenthash, consistentroutee, e, g, list, route, router, routing, sys, test, testing

The RemoteConsistentHashingRouterSpec.scala Akka example source code

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

import akka.testkit.AkkaSpec
import akka.actor.Address
import akka.routing.ActorSelectionRoutee
import akka.routing.ConsistentRoutee
import akka.routing.ConsistentHash

@org.junit.runner.RunWith(classOf[org.scalatest.junit.JUnitRunner])
class RemoteConsistentHashingRouterSpec extends AkkaSpec("""
    akka.actor.provider = "akka.remote.RemoteActorRefProvider" """) {

  "ConsistentHashingGroup" must {

    "use same hash ring indepenent of self address" in {
      // simulating running router on two different nodes (a1, a2) with target routees on 3 other nodes (s1, s2, s3) 
      val a1 = Address("akka.tcp", "Sys", "client1", 2552)
      val a2 = Address("akka.tcp", "Sys", "client2", 2552)
      val s1 = ActorSelectionRoutee(system.actorSelection("akka.tcp://Sys@server1:2552/user/a/b"))
      val s2 = ActorSelectionRoutee(system.actorSelection("akka.tcp://Sys@server2:2552/user/a/b"))
      val s3 = ActorSelectionRoutee(system.actorSelection("akka.tcp://Sys@server3:2552/user/a/b"))
      val nodes1 = List(ConsistentRoutee(s1, a1), ConsistentRoutee(s2, a1), ConsistentRoutee(s3, a1))
      val nodes2 = List(ConsistentRoutee(s1, a2), ConsistentRoutee(s2, a2), ConsistentRoutee(s3, a2))
      val consistentHash1 = ConsistentHash(nodes1, 10)
      val consistentHash2 = ConsistentHash(nodes2, 10)
      val keys = List("A", "B", "C", "D", "E", "F", "G")
      val result1 = keys collect { case k ⇒ consistentHash1.nodeFor(k).routee }
      val result2 = keys collect { case k ⇒ consistentHash2.nodeFor(k).routee }
      result1 should be(result2)
    }

  }

}