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 have discussed Reactive Design Patterns. To develop Reactive systems, we should follow not just Reactive Frameworks and Tools, but also some Reactive Design Patterns and best practices to develop our Systems easily to make them highly available, highly Scalable, high performing, and Resilient. They even work under failure scenarios.

As we know, there are plenty of Reactive Design Patterns available. In this chapter, we discussed some of the important and useful Reactive Design Patterns. We have taken each design pattern and discussed it in detail with some suitable code snippets.

Reactive Systems should follow the Reactive Manifesto regarding the following four design principles:

  • Message-Driven
  • Elasticity
  • Resilience
  • Responsiveness

As we have discussed, a Message is a main or basic building block of Reactive Systems. Each User Action in a Reactive...