But learning the "event loop mindset" is hard. You cannot just write sequential code. This is where Vert.x in Action becomes essential.
Here is an example of a simple Vert.x application in Java: vertx in action pdf download
If you’ve landed on this page, you’re likely deep into the world of reactive programming on the JVM. You’ve heard the buzz about Eclipse Vert.x—the polyglot, event-driven toolkit for building responsive microservices—and you know that the bible for mastering it is Vert.x in Action by Julien Ponge. But learning the "event loop mindset" is hard