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 last chapter, we learned how to route messages to actors, and in this chapter, we will learn about futures.

Futures are used to perform an operation in other threads for concurrency and parallel execution. They contain the result of the concurrent operation and can be accessed synchronously, by blocking the current thread of execution, or asynchronously, (non-blocking) by handling the callback on a future.

Futures require ExecutionContext, which is backed by a thread pool to execute callbacks and other operations.

So, more or less, futures are used to execute operations on other threads concurrently.