Book Image

Scala Reactive Programming

By : Rambabu Posa
Book Image

Scala Reactive Programming

By: Rambabu Posa

Overview of this book

Reactive programming is a scalable, fast way to build applications, and one that helps us write code that is concise, clear, and readable. It can be used for many purposes such as GUIs, robotics, music, and others, and is central to many concurrent systems. This book will be your guide to getting started with Reactive programming in Scala. You will begin with the fundamental concepts of Reactive programming and gradually move on to working with asynchronous data streams. You will then start building an application using Akka Actors and extend it using the Play framework. You will also learn about reactive stream specifications, event sourcing techniques, and different methods to integrate Akka Streams into the Play Framework. This book will also take you one step forward by showing you the advantages of the Lagom framework while working with reactive microservices. You will also learn to scale applications using multi-node clusters and test, secure, and deploy your microservices to the cloud. By the end of the book, you will have gained the knowledge to build robust and distributed systems with Scala and Akka.
Table of Contents (16 chapters)

Akka Configuration

We can develop Akka applications without using any configuration because the Akka framework provides sensible default configuration values for each and every Akka component. If required, we can change configuration values to improve application performance, scalability, and more.

In this section, we will discuss some of the following important Akka framework configuration details:

  • Dispatcher
  • Executor
  • Logging

Akka framework uses the Typesafe Configuration library for this purpose. In the Akka framework, this configuration is read and used by the ActorSystem. By default, the ActorSystem uses all configuration details available in the application.conf file. If required, we can customize it.

Akka Configuration starts with akka, as depicted in the application.conf file:


We can set a log level and default dispatcher for Actors, as shown: