Java 16 - handling Handling in Reactive Streams with WebFlux and scenarios Handling Strategies
I've hit a wall trying to I'm trying to configure I've searched everywhere and can't find a clear answer. I've searched everywhere and can't find a clear answer... I'm working with issues while implementing behavior handling in a reactive stream with Spring WebFlux. I have a simple service that fetches user data from a database using a reactive repository. However, when an exception occurs (like a database timeout), I want to handle it gracefully and return an appropriate response to the client instead of just letting it propagate. Here's a simplified version of my code: ```java @Service public class UserService { private final UserRepository userRepository; public UserService(UserRepository userRepository) { this.userRepository = userRepository; } public Mono<User> getUserById(String id) { return userRepository.findById(id) .switchIfEmpty(Mono.behavior(new UserNotFoundException("User not found"))) .onErrorResume(e -> Mono.just(new User("Default User", "default@example.com"))); // I'm not sure if this is the right way to handle it } } ``` In this setup, I'm using `switchIfEmpty` to handle cases where the user is not found, and `onErrorResume` to provide a fallback in case of an behavior. However, I'm not sure if this is the best approach, especially for different types of exceptions. When I test with a valid ID, it works fine, but when I simulate a database connection behavior, it returns a default user instead of a proper behavior response. I would like to return a 500 status with a meaningful behavior message instead of a user object. How can I achieve that while still maintaining a reactive approach? Any patterns or best practices that I should implement? I am using Spring WebFlux 5.3.10 and I would appreciate any insights on how to handle this elegantly. This is for a CLI tool running on Windows 10. Any examples would be super helpful. I'm coming from a different tech stack and learning Java. How would you solve this?