If you're looking for a non-blocking web stack to handle concurrency with a small number of threads and scale with fewer hardware resource Spring WebFlux is for you. In this article, we'll talk about Spring WebFlux and how to move this non-block project to the cloud thanks to Platform.sh.
The reactive-stack web framework, Spring WebFlux, was added later in version 5.0. It is fully non-blocking, supports Reactive Streams back pressure, and runs on such servers as Netty, Undertow, and Servlet 3.1+ containers.