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 Streams

You have already learned many concepts and developed a couple of Akka Streams examples in Chapter 7, Working with Reactive Streams. As the current chapter is an extension of Chapter 7, Working with Reactive Streams, I recommend that you refer to that chapter and practice those examples before going through this chapter.

Akka Streams revisited

Before moving into the integration of Akka Streams to the Play Framework web application, we will recollect our knowledge about Akka Streams API basics here.

The Akka Streams API has predominantly the following three components:

  • Source
  • Flow
  • Sink

Source is a Producer of a streaming data and has only one Output and no Input points. Sink is a Consumer of a streaming data and...