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

Balancing workload across actors

Often, you may want to ensure that all your worker actors are processing roughly the same number of messages. Akka provides a couple of interesting approaches to achieve this behavior. The first one is using a balancing dispatcher. This dispatcher is backed by ExecutorService where a group of actors shares the same mailbox. The dispatcher will try to redistribute work from busy actors to idle actors. This dispatcher can be easily used by implementing BalancingPool, as we will see in this recipe.

The second option is using SmallestMailboxRouter. When sending a message, this type of router would try to route the message to the actor with the mailbox with fewer messages. In this recipe, we will look at how to configure our actors to use either of these approaches.

Getting ready

To step through this recipe, we need to import the Hello-Akka project; all other prerequisites are the same as earlier.

How it works…

For this recipe, we need to perform the following steps...