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

Creating a simple parallel application using futures

In this recipe, we will create an application that will compute the result in parallel. You will learn how independent operations can be parallelized, which will reduce the running time of a program.

Getting ready

To step through this recipe, we need to import the Hello-Akka project in the IDE. The rest of the prerequisites are the same as before.

How to do it...

  1. Create a simple scala file, say Parallel.scala, in the com.packt.chapter4 package.
  2. Add the following imports to the top of the file:
        import scala.concurrent.{Await, Future} 
  1. Create a Scala object, as shown in the following code snippet, which calculates a Fibonacci number:
        object Fib { 
          def fib(n: Int): Int = { 
            def fib_tail(n: Int, a: Int, b: Int): Int = n match { 
              case 0 => a 
              case _ => fib_tail(n - 1, b, a + b)