| career | drupal | java | mac | mysql | perl | scala | uml | unix  

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

This example Akka source code file (RemoteDeploymentWatcher.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

actor, actorref, akka, dispatch, internalactorref, remote, remotedeploymentwatcher, requiresmessagequeue, terminated, watchremote

The RemoteDeploymentWatcher.scala Akka example source code

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

package akka.remote

import akka.dispatch.sysmsg.DeathWatchNotification
import akka.dispatch.{ UnboundedMessageQueueSemantics, RequiresMessageQueue }

private[akka] object RemoteDeploymentWatcher {
  final case class WatchRemote(actor: ActorRef, supervisor: ActorRef)

 * Responsible for cleaning up child references of remote deployed actors when remote node
 * goes down (jvm crash, network failure), i.e. triggered by [[]].
private[akka] class RemoteDeploymentWatcher extends Actor with RequiresMessageQueue[UnboundedMessageQueueSemantics] {
  import RemoteDeploymentWatcher._
  var supervisors = Map.empty[ActorRef, InternalActorRef]

  def receive = {
    case WatchRemote(a, supervisor: InternalActorRef) ⇒
      supervisors += (a -> supervisor)

    case t @ Terminated(a) if supervisors isDefinedAt a ⇒
      // send extra DeathWatchNotification to the supervisor so that it will remove the child
      supervisors(a).sendSystemMessage(DeathWatchNotification(a, existenceConfirmed = t.existenceConfirmed,
        addressTerminated = t.addressTerminated))
      supervisors -= a

    case _: Terminated ⇒

Other Akka source code examples

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

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.