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

Composing agents monadically

Like futures, we can also compose future using for-comprehensions. In this recipe, we will see how we can do this.

Getting ready

We have already downloaded the akka-agent dependency in the project, so we will need to just import the project into the IDE.

How to do it..

  1. Create a scala file, AgentComposition.scala, in the com.packt.chapter4 package.
  2. Add the following imports to the top of the file:
        import akka.agent.Agent 
  1. Create a test application, as follows:
        object AgentComposition extends App { 
          val agent1 = Agent("Hello, ") 
          val agent2 = Agent("World") 
          val finalAgent = for { 
            value1 <- agent1 
            value2 <- agent2  }  yield value1 + value2 

How it works...

It is the same as when we composed futures using for-comprehensions. We can also use the map and flatMap methods on agents as well...