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)

Integrating Akka Streams to Play Application

In this chapter, we will discuss Akka Dynamic Streams components, MergeHub, BroadcastHub, and PartitionHub in detail with some simple examples. Dynamic Streams allow us to execute an Akka Stream's component multiple times, based on our requirements; this is not possible with Basic Akka Static Streams components (discussed in Chapter 7, Working with Reactive Streams).

Once we are comfortable with Akka Dynamic Streams components, we will design a Reactive Chat Application graph using both Akka Static and Dynamic Streams components. We will understand how to use Dynamic Streams components to implement our application.

We will develop a Reactive Chatting System using Scala, Play Framework, Web Socket, Akka Streams API, SBT, and so on.

Finally, we will discuss the Akka Persistence Query API with some simple examples. We will use a similar...