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

Error handling in Akka streams

It is a common mistake to develop applications assuming that there will be no unexpected issues. Akka provides a set of supervision strategies to deal with errors that happen in actors. Akka Streams is no different and provides a similar approach to deal with unexpected exceptions. For instance, these exceptions might occur when an element in the stream is not the expected type. In this recipe, we will see how to handle such errors.

Getting ready

We will use the same prerequisites as before. We will define a supervision strategy to handle certain types of error.

How to do it...

For this recipe, perform the following steps:

  1. Create a file named HandlingErrorsApplication.scala inside the com.packt.chapter8 package. This object will create a stream with two custom supervision strategies: one for a particular flow and one for the whole stream. The content should look like this:
        package com.packt.chapter8

        import akka...