Hands-On Reactive Programming with Reactor

Discover how project Reactor enhances the reactive programming paradigm and allows you to build scalable asynchronous applications
Key Features
Use reactive APIs, Flux, and Mono to implement reactive extensions

Create concurrent applications without the complexity of Java's concurrent API

Understand techniques to implement event-driven and reactive applications


Book Description
Reactor is an implementation of the Java 9 Reactive Streams specification, an API for asynchronous data processing. This specification is based on a reactive programming paradigm, enabling developers to build enterprise-grade, robust applications with reduced complexity and in less time. Hands-On Reactive Programming with Reactor shows you how Reactor works, as well as how to use it to develop reactive applications in Java.


The book begins with the fundamentals of Reactor and the role it plays in building effective applications. You will learn how to build fully non-blocking applications and will later be guided by the Publisher and Subscriber APIs. You will gain an understanding how to use two reactive composable APIs, Flux and Mono, which are used extensively to implement Reactive Extensions. All of these components are combined using various operations to build a complete solution.


In addition to this, you will get to grips with the Flow API and understand backpressure in order to control overruns. You will also study the use of Spring WebFlux, an extension of the Reactor framework for building microservices.


By the end of the book, you will have gained enough confidence to build reactive and scalable microservices.
What you will learn
Explore benefits of the Reactive paradigm and the Reactive Streams API

Discover the impact of Flux and Mono implications in Reactor

Expand and repeat data in stream processing

Get to grips with various types of processors and choose the best one

Understand how to map errors to make corrections easier

Create robust tests using testing utilities offered by Reactor

Find the best way to schedule the execution of code


Who this book is for
If you're looking to develop event- and data-driven applications easily with Reactor, this book is for you. Sound knowledge of Java fundamentals is necessary to understand the concepts covered in the book.