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

Writing unit test for actors

When we develop an Akka application, we should write an automated test for our actors to check whether they are working as expected. Since the actor model is different as they are asynchronous in nature, we have a different view of how we will perform unit tests on them.

Getting ready

First of all, we will add the akka-testkit dependency to our application's build.sbt. So, add the following dependency to build.sbt:

libraryDependencies += "com.typesafe.akka" % "akka-testkit_2.11" % "2.4.4"

libraryDependencies += "org.scalatest" % "scalatest_2.11" % "3.0.1"

Now move to the project root directory and run the sbt update command; it will download the preceding dependencies. Now import the Hello-Akka project in the IDE.

How to do it…

  1. Create a com.packt.chapter5 package in the src/test/scala project folder.
  2. Create a Scala file, say, Testing.scala, in the com.packt.chapter5 package.
  3. Add the following import to the top of the file:
        import{Actor, ActorSystem...