Spring Cloud - 28. Micro Service간 통신 Feign client

목차

• Spring Cloud - 30. Micro Service간 통신 ErrorDecoder 구현
• Spring Cloud - 29. Micro Service간 통신 Feign client 예외 처리
• Spring Cloud - 28. Micro Service간 통신 Feign client
• Spring Cloud - 27. Micro Service간 통신

User service

// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-openfeign
implementation 'org.springframework.cloud:spring-cloud-starter-openfeign'

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@Slf4j
public class UserServiceApplication {

    public static void main(String[] args){
        SpringApplication.run(UserServiceApplication.class, args);
    }

    @Bean
    public BCryptPasswordEncoder passwordEncoder() throws UnknownHostException {
        return new BCryptPasswordEncoder();
    }

    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

FeignClient의 name속성에 들어가는 값은 eureka 서버에 등록 돼 있는 Application 이름이다.

@FeignClient(name = "order-service")
public interface OrderServiceClient {

    @GetMapping("/order-service/{userId}/orders")
    List<ResponseOrder> getOrders(@PathVariable String userId);
}

@Override
public UserDto getUserByUserId(String userId) {
    UserEntity userEntity = userRepository.findByUserId(userId);

    if (userEntity == null)
        throw new UsernameNotFoundException("User not found");

    UserDto userDto = new ModelMapper().map(userEntity, UserDto.class);

    List<ResponseOrder> orderList = orderServiceClient.getOrders(userId);
    userDto.setOrders(orderList);

    return userDto;
}