In Chapter 2, Microservices and Reactive Architecture, we spoke about reactive systems and reactive architectures, and how this approach differs from the traditional Java EE/Jakarta EE development model.

One of the main differences is that the reactive development model is event-driven and asynchronous by default. So, there is no way to implement I/O blocking code, and the usage of the kernel thread is very low.

In order to compare the different development choices made by the two architectural platforms, we will try to analyze how to realize, through Eclipse Vert.x, the same microservices developed in the previous chapters.

You will find the code described in this chapter in this GitHub repository https://github.com/PacktPublishing/Hands-On-Cloud-Native-Microservices-with-Jakarta-EE/tree/master/appendix-B.