Reactive Routes
https://quarkus.io/guides/reactive-routes
Reactive routes propose an alternative approach to implement HTTP endpoints where you declare and chain routes. This approach became very popular in the JavaScript world, with frameworks like Express.Js or Hapi. Quarkus also offers the possibility to use reactive routes. You can implement REST API with routes only or combine them with Jakarta REST resources and servlets.
Reactive Routes were initially introduced to provide a reactive execution model for HTTP APIs on top of the Quarkus Reactive Architecture. With the introduction of Quarkus REST (formerly RESTEasy Reactive), you can now implement reactive HTTP APIs and still use Jakarta REST annotations. Reactive Routes are still supported, especially if you want a more route-based approach, and something closer to the underlying reactive engine.