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

This example Akka source code file (ConsistentHashingRouterDocSpec.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; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

akka, consistenthashable, consistenthashableenvelope, consistenthashingrouterdocspec, entry, evict, get, hello, hi, implicitsender, route, routing, string, test, testing, testkit

The ConsistentHashingRouterDocSpec.scala Akka example source code

 * Copyright (C) 2009-2014 Typesafe Inc. <>
package docs.routing

import akka.testkit.AkkaSpec
import akka.testkit.ImplicitSender
import akka.routing.FromConfig

object ConsistentHashingRouterDocSpec {

  import akka.routing.ConsistentHashingRouter.ConsistentHashable

  class Cache extends Actor {
    var cache = Map.empty[String, String]

    def receive = {
      case Entry(key, value) => cache += (key -> value)
      case Get(key)          => sender() ! cache.get(key)
      case Evict(key)        => cache -= key

  final case class Evict(key: String)

  final case class Get(key: String) extends ConsistentHashable {
    override def consistentHashKey: Any = key

  final case class Entry(key: String, value: String)


class ConsistentHashingRouterDocSpec extends AkkaSpec with ImplicitSender {

  import ConsistentHashingRouterDocSpec._

  "demonstrate usage of ConsistentHashableRouter" in {

    def context = system

    import akka.routing.ConsistentHashingPool
    import akka.routing.ConsistentHashingRouter.ConsistentHashMapping
    import akka.routing.ConsistentHashingRouter.ConsistentHashableEnvelope

    def hashMapping: ConsistentHashMapping = {
      case Evict(key) => key

    val cache: ActorRef =
      context.actorOf(ConsistentHashingPool(10, hashMapping = hashMapping).
        props(Props[Cache]), name = "cache")

    cache ! ConsistentHashableEnvelope(
      message = Entry("hello", "HELLO"), hashKey = "hello")
    cache ! ConsistentHashableEnvelope(
      message = Entry("hi", "HI"), hashKey = "hi")

    cache ! Get("hello")

    cache ! Get("hi")

    cache ! Evict("hi")
    cache ! Get("hi")




Other Akka source code examples

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

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