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)

Introduction to Scala

Scala stands for Scalable language. Scala is a multi-paradigm programming language built on JVM by the Lightbend (formerly known as Typesafe) team. In Scala, it is easy to write concurrent parallel, distributed, and Reactive applications in a concise, elegant, and type-safe way.

Unlike Java, Scala is a pure OOP and FP language. Java is not a pure OOP language because of the following:

  • It supports static members
  • It supports primitive data types

Scala does not support static members. Then how do we define utility methods in Scala? We will explore those in the upcoming sections. In Scala, everything is an object only. There are no primitive types in Scala.

Both Scala and Java programming languages run on JVM:

From Java 8 onward, we can write functional-style programming in Java. However, it does not support all FP features.

Scala's latest stable version...