Feign Client 문서 및 코드 작성

user-service/build.gradle

@@ -9,6 +9,7 @@ dependencies {
     implementation 'org.springframework.cloud:spring-cloud-starter-bus-amqp'
     implementation 'org.springframework.cloud:spring-cloud-starter-config'
     implementation 'org.springframework.cloud:spring-cloud-starter-bootstrap'
+    implementation 'org.springframework.cloud:spring-cloud-starter-openfeign'
     implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
     implementation 'io.jsonwebtoken:jjwt:0.9.1'
 

user-service/src/main/java/com/roy/springcloud/userservice/UserServiceApplication.java

@@ -1,14 +1,19 @@
 package com.roy.springcloud.userservice;
 
+import com.roy.springcloud.userservice.client.FeignErrorDecoder;
+import feign.Logger;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 import org.springframework.cloud.client.loadbalancer.LoadBalanced;
-import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
+import org.springframework.cloud.openfeign.EnableFeignClients;
 import org.springframework.context.annotation.Bean;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.web.client.RestTemplate;
 
-@EnableEurekaClient
+
+@EnableFeignClients
+@EnableDiscoveryClient
 @SpringBootApplication
 public class UserServiceApplication {
 
@@ -27,4 +32,14 @@ public class UserServiceApplication {
         return new RestTemplate();
     }
 
+    @Bean
+    public Logger.Level feignLoggerLevel() {
+        return Logger.Level.FULL;
+    }
+
+    @Bean
+    public FeignErrorDecoder getFeignErrorDecoder() {
+        return new FeignErrorDecoder();
+    }
+
 }

user-service/src/main/java/com/roy/springcloud/userservice/client/FeignErrorDecoder.java

@@ -0,0 +1,22 @@
+package com.roy.springcloud.userservice.client;
+
+import feign.Response;
+import feign.codec.ErrorDecoder;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.server.ResponseStatusException;
+
+public class FeignErrorDecoder implements ErrorDecoder {
+    @Override
+    public Exception decode(String methodKey, Response response) {
+        switch (response.status()) {
+            case 404:
+                if (methodKey.contains("getOrders")) {
+                    return new ResponseStatusException(HttpStatus.valueOf(response.status()), "Order Info Not Found");
+                }
+                break;
+            default:
+                return new Exception(response.reason());
+        }
+        return null;
+    }
+}

user-service/src/main/java/com/roy/springcloud/userservice/client/OrderServiceClient.java

@@ -0,0 +1,17 @@
+package com.roy.springcloud.userservice.client;
+
+import com.roy.springcloud.userservice.vo.response.OrderResponse;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+import java.util.List;
+
+@FeignClient(name = "order-service")
+public interface OrderServiceClient {
+
+    @GetMapping("/invalid-path/{userId}")
+    // @GetMapping("/order-service/{userId}/orders")
+    List<OrderResponse> getOrders(@PathVariable String userId);
+
+}

user-service/src/main/java/com/roy/springcloud/userservice/service/impl/MyUserServiceImpl.java

@@ -1,11 +1,13 @@
 package com.roy.springcloud.userservice.service.impl;
 
+import com.roy.springcloud.userservice.client.OrderServiceClient;
 import com.roy.springcloud.userservice.domain.MyUser;
 import com.roy.springcloud.userservice.dto.MyUserDto;
 import com.roy.springcloud.userservice.repository.MyUserRepository;
 import com.roy.springcloud.userservice.service.MyUserService;
 import com.roy.springcloud.userservice.vo.response.OrderResponse;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.core.env.Environment;
 import org.springframework.http.HttpMethod;
@@ -21,6 +23,7 @@ import java.util.*;
 
 import static com.roy.springcloud.util.mapper.MapperUtil.toObject;
 
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class MyUserServiceImpl implements MyUserService {
@@ -28,6 +31,7 @@ public class MyUserServiceImpl implements MyUserService {
     private final RestTemplate restTemplate;
     private final MyUserRepository userRepository;
     private final BCryptPasswordEncoder passwordEncoder;
+    private final OrderServiceClient orderServiceClient;
 
     @Override
     public void createUser(MyUserDto userDto) {
@@ -41,12 +45,15 @@ public class MyUserServiceImpl implements MyUserService {
     public MyUserDto getUserByUserId(String userId) {
         MyUser savedUser = userRepository.findByUserId(userId)
                 .orElseThrow(() -> new UsernameNotFoundException("User not found"));
-        ResponseEntity<List<OrderResponse>> orderListResponse = restTemplate.exchange(
-                getOrderRequestUrl(userId), HttpMethod.GET, null,
-                new ParameterizedTypeReference<List<OrderResponse>>() {}
-        );
+//        ResponseEntity<List<OrderResponse>> orderListResponse = restTemplate.exchange(
+//                getOrderRequestUrl(userId), HttpMethod.GET, null,
+//                new ParameterizedTypeReference<List<OrderResponse>>() {}
+//        );
+//        MyUserDto response = toObject(savedUser, MyUserDto.class);
+//        response.setOrders(orderListResponse.getBody());
+        List<OrderResponse> orderListResponse = orderServiceClient.getOrders(userId);
         MyUserDto response = toObject(savedUser, MyUserDto.class);
-        response.setOrders(orderListResponse.getBody());
+        response.setOrders(orderListResponse);
         return response;
     }
 

user-service/src/main/resources/application.yml

@@ -34,7 +34,7 @@ greeting:
   message: Welcome to the Simple E-Commerce(User Service).
 
 logging:
-  lelvel:
+  level:
     com.roy.springcloud.userservice: DEBUG
 
 management: