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

Understanding the service locator

In an environment full of dynamic components, it is important to have a registry where services can register themselves and discover other services at runtime. This registry needs to maintain an updated list of available services. The ServiceLocator is the API that Lagom provides as the query mechanism to achieve these tasks. The actual implementation behind the ServiceLocator API can be chosen depending on the use case. There are plenty of technologies that provide Service Registry capabilities, such as Apache Zookeeper, Consul, or ConductR. 

When running Lagom in development, the framework provides an in-memory service locator where all services get registered when we run sbt runAll. Although this might be sufficient for development environments, when running services in production, this will not be enough since your services would be running remotely. In this recipe, we will explain how the service locator API works and how to add external services to...