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)

The Circuit Breaker pattern

In this section, we will discuss another popular and frequently used Reactive Design Pattern: the Circuit Breaker Design Pattern.

Understanding the Circuit Breaker pattern

A Circuit Breaker is one of the most popular and frequently used Reactive Design Patterns. It deals with our Reactive System Stability-related issues. It helps our Reactive System to deal with our System's dependency issues, such as down, crashed, slow performance, restart, and so on.

This Circuit Breaker component finds those dependency issues and stops the sending of further requests so that our system does not waste allocating resources, and also our end users immediately see some error message such as System is unavailable...