Reactive programming is an important coding style that evolved from the functional world. Reactive code utilizes an event-driven philosophy of streams, producers, and subscribers to simplify complex logic and enable asynchronous, nonblocking handling of IO processing in applications. In Java, this means we can build applications using the java.nio (nonblocking IO) package with expressive APIs. Many frameworks and approaches support reactivity in Java. One of the most popular is Spring WebFlux. This article is a hands-on introduction to reactive Java programming with Spring WebFlux.
