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)

What is Play Dependency Injection (DI)

Play Framework supports DI, which is one of the popular Design Patterns used to decouple Application components behavior from Application components dependencies resolution.

In simple terms, DI means resolving dependencies automatically by server/container, but not by the developer.

Benefits of DI

The following are the benefits of DI:

  • Clear separation between actual business logic and dependency resolution
  • Encourages Single Responsibility Principle (SRP)
  • Ease of maintenance and testing

Play Framework supports the following two kinds of DI:

  • Play Compile-time DI: This involves resolving dependencies automatically at compile-time.
  • Play Run-time DI: This involves resolving dependencies...