Tell us about your experience with WebFlux.

WebFlux is a reactive stack in the Spring Framework that enables the creation of non-blocking, asynchronous web applications based on Project Reactor.

In my experience with WebFlux, I used it to implement REST APIs with high load and scalability requirements. Thanks to the reactive approach, it was possible to significantly reduce thread consumption and increase throughput.

Key points:

• Using Mono and Flux for working with 0..1 and 0..N elements respectively.
• Reactive drivers for databases (e.g., R2DBC) for non-blocking data access.
• Handling requests via RouterFunction and HandlerFunction or @RestController annotations with reactive types.

Example of a WebFlux controller:

@GetMapping("/users/{id}")
public Mono<User> getUser(@PathVariable String id) {
    return userRepository.findById(id);
}

WebFlux is well-suited for microservices where high responsiveness and scalability are important, especially when working with a large number of concurrent connections.