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  • 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

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.

  • 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
Page Count 250
Course Length 7 hours 30 minutes
ISBN 9781789135794
Date Of Publication 28 Sep 2018


Rahul Sharma

Rahul Sharma is passionately curious about teaching programming. He has been writing software for the last two years. He got started with Rust with his work on Servo, a browser engine by Mozilla Research as part of his GSoC project. At present, he works at AtherEnergy, where he is building resilient cloud infrastructure for smart scooters. His interests include systems programming, distributed systems, compilers and type theory. He is also an occasional contributor to the Rust language and does mentoring of interns on the Servo project by Mozilla.