Book Image

Akka Cookbook

By : Vivek Mishra, Héctor Veiga Ortiz
Book Image

Akka Cookbook

By: Vivek Mishra, Héctor Veiga Ortiz

Overview of this book

Akka is an open source toolkit that simplifies the construction of distributed and concurrent applications on the JVM. This book will teach you how to develop reactive applications in Scala using the Akka framework. This book will show you how to build concurrent, scalable, and reactive applications in Akka. You will see how to create high performance applications, extend applications, build microservices with Lagom, and more. We will explore Akka's actor model and show you how to incorporate concurrency into your applications. The book puts a special emphasis on performance improvement and how to make an application available for users. We also make a special mention of message routing and construction. By the end of this book, you will be able to create a high-performing Scala application using the Akka framework.
Table of Contents (18 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Sending specially handled messages to routers

There are some kinds of message that are specially handled by actors. They have a special behavior. These messages are mostly used for handling management of the actors.

The following are the different types of message:

  • Broadcast messages
  • PoisonPill messages
  • Kill messages
  • Management messages such as AddRoutee, RemoveRoutee, and so on

Getting ready

We will limit our recipe to the Broadcast, PoisonPill, and Kill messages. All prerequisites are the same as earlier.

How to do it...

  1. Create a Scala file, SpeciallyHandled.scala, in the package com.packt.chapter3.
  2. Add the following import to the top of the file:
        import{PoisonPill, Props, ActorSystem, Actor} 
        import akka.routing.{Broadcast, RandomPool} 
  1. Add the following case object message sent to the actor:
        case object Handle 
  1. Define an actor as follows:
        class SpeciallyHandledActor extends Actor { 
          override def receive = { 
            case Handle => println...