Microservices In Spring Boot

What is the main advantage of using Microservices architecture with Spring Boot?

Which tool is commonly used for service discovery in Spring Boot microservices?

What does this configuration do?

@SpringBootApplication
@EnableEurekaClient
public class OrderServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(OrderServiceApplication.class, args);
    }
}

Which Spring Boot project is commonly used for declarative REST client communication between microservices?

What does this interface represent?

@FeignClient(name = "user-service")
public interface UserClient {
    @GetMapping("/users/{id}")
    User getUserById(@PathVariable Long id);
}

In Spring Boot microservices, what is the main purpose of an API Gateway (e.g., Spring Cloud Gateway)?

What does this configuration achieve?

spring:
  cloud:
    gateway:
      routes:
        - id: order-service
          uri: lb://order-service
          predicates:
            - Path=/orders/**

Which Spring Cloud component provides centralized configuration management for microservices?

Which library in Spring Cloud provides circuit breaker functionality for fault tolerance?

What does this method do?

@CircuitBreaker(name = "userService", fallbackMethod = "fallbackUser")
public User getUser(Long id) {
    return userClient.getUserById(id);
}

public User fallbackUser(Long id, Throwable ex) {
    return new User(id, "Unknown");
}