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


In the previous chapter, you learned about some basic and advanced things about Akka actors. In this chapter, you will learn about supervision and monitoring of Akka actors.

Using supervision and monitoring, we can write fault-tolerant systems, which can run continuously for days, months, and years without stopping. Let's see what is meant by fault tolerance.

What is fault tolerance?

Fault tolerance is a property of systems that are intended to be always responsive rather than failing completely in case of a failure. Such systems are known as fault tolerance systems or resilient systems.

In simple words, a fault-tolerant system is one which is destined to continue as more or less fully operational, with perhaps a reduction in throughput or an increase in response time because of partial failure of its components.

Even if a components fails, the whole system never gets shut down; instead, it remains operational and responsive with just a decreased throughput.

Similarly, while designing...