Spring WebFlux provides reactive, async, non-blocking programming support for web applications in an annotated Controller format similar to SpringMVC.

This approach is similar to how Node.js uses an async, non-blocking model which helps make it more scalable. Spring WebFlux uses a similar model but with multiple event loops.

Spring WebFlux moves away from the thread-per-request blocking model in traditional SpringMVC(with Tomcat by default) and moves towards a multi-EventLoop, async, non-blocking(with Netty by default) paradigm with back-pressure that is more scalable and efficient than traditional blocking code.

For a more general introduction to Reactive Functional Programing with Java check out: https://medium.com/javarevisited/intro-to-reactive-functional-programming-d49e00365847

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Intro

In the modern computing environment, there are more users with heavier usage patterns and much higher expectations for user experience. Many applications are starting to be deployed on highly distributed cloud servers which come with their own set of complications.

To address these concerns, many engineering teams are turning to the Reactive Functional paradigm of programming.

This article will give you a brief introduction to Reactive Functional Programming.

What is Reactive Programming?

Interactive programs work at their own pace and mostly deal with communication, while reactive programs only work in response to external demands and mostly deal with accurate interrupt handling.

— Gérard Berry…

Introduction