Hands-On Reactive Programming in Spring 5

Publish-Subscribe pattern with @EventListener

It would be awkward to develop software with the need to re-implement the same software patterns again and again. Luckily, we have Spring Framework, plenty of adorable libraries, and other superb frameworks (Spring is not the only one). As we all know, Spring Framework provides most of the building blocks we could ever need for software development. Of course, for a long time, the framework had its own implementation of the Observer Pattern, and this was widely used for tracking the application's life cycle events. Starting with Spring Framework 4.2, this implementation and concomitant API was extended to be used for the handling of not only application events but also business logic events. In ...