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)


In this chapter, we discussed TDD basics and its benefits. It follows Test First, Code Next approach thats why it is also known as Test First Development.

We discussed ScalaTest and its associated ScalaTestPlus Unit Testing Framework. The ScalaTest Plus Framework is a useful library to unit test Play Framework components.

You learned how to test Scala Standalone projects, using the ScalaTest framework, how to test Akka Actors, using its Testing module, akka-testkit; and how to test Akka Streams components, using Akka Toolkits testing modules, akka-testkit and akka-stream-testkit.

We saw that the Lagom Framework provides two testing modules, lagom-core-testkit and lagom-scaladsl-testkit, to unit test its components.

Next, we talked about Scoverage, which is a Code Coverage tool for Scala-based applications and microservices. It supports three different plugins to support...