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

Implementing Lagom services

As we have explained through the previous recipes, services in Lagom have two modules: the API module responsible for defining the contract of the service and the implementation module where we develop the logic behind the API calls. Lagom is asynchronous by default. This means that multiple incoming requests will be served concurrently. Lagom leverages Akka and Play to provide a powerful and resilient engine to run your services. Every service implementation contains at least three components: the service loader, the service application, and the service implementation.

In this recipe, we will review these three components by creating a token service implementation and explain the responsibilities and duties for each of them.

Getting ready

To step through this recipe, we need to import the Lagom Akkacoobook project that we created in the initial recipe of this chapter; all other prerequisites are the same as earlier.

How to do it…

For this recipe, we need to perform...