Hands-On Reactive Programming in Spring 5

Reactive landscape

In the previous sections, we learned how to use pure RxJava and how to combine it with Spring Web MVC. To demonstrate the benefits of this, we have updated our temperature-monitoring application and improved the design by applying RxJava. However, it is worth noting that Spring Framework and RxJava is not the only valid combination. A lot of application servers also value the power of the reactive approach. As such authors of a successful reactive server called Ratpack decided to adopt RxJava as well.

Along with callbacks and a promise-based API, Ratpack provides RxRatpack, a separate module that allows to convert Ratpack Promise to RxJava Observable easily, and vice versa, as shown in the following code:

Promise<String> ...