Book Image

Hands-On Reactive Programming with Clojure - Second Edition

By : Konrad Szydlo, Leonardo Borges
Book Image

Hands-On Reactive Programming with Clojure - Second Edition

By: Konrad Szydlo, Leonardo Borges

Overview of this book

Reactive Programming is central to many concurrent systems, and can help make the process of developing highly concurrent, event-driven, and asynchronous applications simpler and less error-prone. This book will allow you to explore Reactive Programming in Clojure 1.9 and help you get to grips with some of its new features such as transducers, reader conditionals, additional string functions, direct linking, and socket servers. Hands-On Reactive Programming with Clojure starts by introducing you to Functional Reactive Programming (FRP) and its formulations, as well as showing you how it inspired Compositional Event Systems (CES). It then guides you in understanding Reactive Programming as well as learning how to develop your ability to work with time-varying values thanks to examples of reactive applications implemented in different frameworks. You'll also gain insight into some interesting Reactive design patterns such as the simple component, circuit breaker, request-response, and multiple-master replication. Finally, the book introduces microservices-based architecture in Clojure and closes with examples of unit testing frameworks. By the end of the book, you will have gained all the knowledge you need to create applications using different Reactive Programming approaches.
Table of Contents (15 chapters)

What is Reactive Programming?

Reactive Programming is a term that's gaining more and more recognition in the IT community. As we will see in this chapter, it is not a new topic and has been sadly overlooked for many years. Recent advancements in hardware and software, combined with applications requiring more elaborate user interactions, have resulted in the concept of Reactive Programming being rediscovered by a wider audience. Reactive Programming is both an overloaded term and a broad topic. As such, this book will focus on a specific formulation of Reactive Programming called Compositional Event Systems (CES).

In this chapter, we will cover the following topics:

  • A working example of a reactive application in Clojure
  • The history of Reactive Programming
  • The most common terms in Reactive Programming
  • The most common applications of Reactive Programming