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

Understanding OneForOneStrategy for actors

In this recipe, you will learn about OneForOneStrategy to implement the let it crash model.

The OneForOneStrategy class is applied when we want to supervise the child actors in such a way that only the failed child would be restarted, resumed, or escalated, not it's siblings. If we don't specify any supervisor strategy, then the default would be OneForOneStrategy. Let's understand it.

The OneForOneStrategy class is useful when actors are not dependent on each other, they are each responsible for a single task, and failure of one actor does not affect another.

To step through this recipe, we need to import the Hello-Akka project in IDE.

How to do it...

  1. Create a file, SupervisorStrategy.scala, in package com.packt.chapter2.
  2. Add the following import to the top of the file:
          Restart, Resume, Stop} 
        import{Actor, ActorSystem, 
          OneForOneStrategy, Props} 
  1. Define two...