Intro

Building java based rest API with reactive programming should not be something new. There are so many references online.

But apparently, there are some differences if we build a reactive application that is not an HTTP web server API. For example, a subscriber app for Pub/Sub. I personally had some difficulties trying to find references or another people’s experiences when building a reactive Pub/Sub subscriber app. And that’s what makes me write this.

To give you some context…

In this article, I will try to explain in general what I learned after building subscriber application with reactive programming. But to give some context, what my…