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

Throttling of messages while sending them to an actor

There are some scenarios where you need to limit the rate at which you are sending some messages. For example, this happens when we need to use an external service. This service might have a threshold upon which you get blocked, or it becomes a pay-as-you-go utility. Akka provides a timer-based throttler as part of the akka-contrib module to achieve this kind of behavior.

In this recipe, we will revisit how to configure and use the timer-based throttler and provide an explanation of what the implications are.

Getting ready

To step through this recipe, we need to import the Hello-Akka project; all other prerequisites are the same as earlier. Also, we will define the required dependency to bring the Akka Contrib module.

How to do it…

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

  1. We need to bring the required dependencies.
  2. Edit build.sbt file and add the Akka Stream dependency, as follows:
        libraryDependencies += "com.typesafe...