Feign Client and Fallbacks.

Feign Client:

A declarative REST client that makes writing web service clients easier.

@FeignClient(name = "user-service", fallback = UserServiceFallback.class)
public interface UserClient {
    @GetMapping("/users/{id}")
    User getUser(@PathVariable String id);
}

Fallbacks:

• Part of resilience. If user-service is down, the code inside UserServiceFallback will execute instead of throwing an error.
• Provides a "Graceful Degradation" experience for the user.