Microservice communication/rest template

d-gateway/src/main/resources/application.yml

@@ -76,6 +76,9 @@ spring:
           uri: lb://ORDER-SERVICE
           predicates:
             - Path=/order-service/**
+          filters:
+            - RemoveRequestHeader=Cookie
+            - RewritePath=/order-service/(?<segment>.*), /$\{segment}
 
       default-filters:
         - name : GlobalFilter

d-order-service/src/main/java/com/example/dorderservice/controller/OrderController.java

@@ -16,7 +16,7 @@
 
 @RequiredArgsConstructor
 @RestController
-@RequestMapping("/order-service")
+@RequestMapping("/")
 public class OrderController {
 
     private final OrderService orderService;

d-user-service/src/main/java/com/example/duserservice/UserServiceApplication.java

@@ -2,21 +2,15 @@
 
 import org.modelmapper.ModelMapper;
 import org.modelmapper.convention.MatchingStrategies;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
-import org.springframework.context.ApplicationContext;
-import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 import org.springframework.context.annotation.Bean;
-import org.springframework.security.web.FilterChainProxy;
-
-import javax.servlet.FilterChain;
+import org.springframework.web.client.RestTemplate;
 
 @SpringBootApplication
-@EnableDiscoveryClient
+@EnableDiscoveryClient  //유레카 클라이언트로 추가
 public class UserServiceApplication {
 
     public static void main(String[] args) {
@@ -31,4 +25,11 @@ public ModelMapper modelMapper() {
     }
 
 
+    @Bean
+    @LoadBalanced  //url 주소 service이름으로 대체 시켜주는 어노테이션
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
+
 }

d-user-service/src/main/java/com/example/duserservice/controller/UserApiController.java

@@ -52,7 +52,9 @@ public ResponseEntity<ResponseUser> createUser(@RequestBody @Valid RequestUser r
     public ResponseEntity findUsers() {
         return ResponseEntity.status(HttpStatus.ACCEPTED).body(userService.findUserByAll());
     }
-
+
+
+    //유저정보와 오더정보를 한번에 가져오기 (order : restTemplate 호출)
     @GetMapping("/users/{userId}")
     public ResponseEntity findUserByUserId(@PathVariable String userId) {
         return ResponseEntity.status(HttpStatus.ACCEPTED).body(userService.findUserByUserId(userId));

d-user-service/src/main/java/com/example/duserservice/service/UserServiceImpl.java

@@ -6,12 +6,16 @@
 import com.example.duserservice.vo.UserDto;
 import org.modelmapper.ModelMapper;
 import org.springframework.context.annotation.Lazy;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpMethod;
 import org.springframework.security.core.userdetails.User;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
 
+import java.lang.reflect.ParameterizedType;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
@@ -24,12 +28,17 @@ public class UserServiceImpl implements UserService {
     private final UserRepository userRepository;
     private final ModelMapper modelMapper;
     private final PasswordEncoder passwordEncoder;
+    private final RestTemplate restTemplate;
 
     //@Lazy : 순환참조 에러로 @Lazy 추가
-    public UserServiceImpl(UserRepository userRepository, ModelMapper modelMapper, @Lazy PasswordEncoder passwordEncoder) {
+    public UserServiceImpl(UserRepository userRepository,
+                           ModelMapper modelMapper,
+                           @Lazy PasswordEncoder passwordEncoder ,
+                           RestTemplate restTemplate) {
         this.userRepository = userRepository;
         this.modelMapper = modelMapper;
         this.passwordEncoder = passwordEncoder;
+        this.restTemplate = restTemplate;
     }
 
     //UserDetailService Override
@@ -45,14 +54,18 @@ public UserDetails loadUserByUsername(String userEmail) throws UsernameNotFoundE
 
     @Override
     public UserDto createUser(UserDto userDto) {
-        userDto.setUserId(UUID.randomUUID().toString());
+        String id = userDto.getEmail().split("@")[0];
+        userDto.setUserId(id);
+
         userDto.setEncryptedPwd(passwordEncoder.encode(userDto.getPwd()));
         UserEntity userEntity = modelMapper.map(userDto, UserEntity.class);
         userRepository.save(userEntity);
 
         return userDto;
     }
-
+
+
+    //userId 찾고 order 정보도 함께 호출하기 =>restTemplate 이용
     @Override
     public UserDto findUserByUserId(String userId) {
         UserEntity userEntity = userRepository.findByUserId(userId).orElseThrow(() ->
@@ -61,8 +74,12 @@ public UserDto findUserByUserId(String userId) {
 
         UserDto userDto = modelMapper.map(userEntity, UserDto.class);
 
-        List<ResponseOrder> orders = new ArrayList<>();
-        userDto.setOrders(orders);
+        String orderUrl = String.format("http://ORDER-SERVICE/%s/orders" , userId);  //@LoadBalancer 사용으로 주소 바꿈
+        // ParameterizedTypeReference  :Generic 타입을 class로 넘겨줄 때 사용하는 객체
+        List<ResponseOrder> orderList = restTemplate.exchange(orderUrl, HttpMethod.GET, null, new ParameterizedTypeReference<List<ResponseOrder>>(){})
+                .getBody();
+
+        userDto.setOrders(orderList);
 
         return userDto;
     }

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

@@ -11,9 +11,9 @@ spring:
       settings:
         web-allow-others: true
       path: /h2-console
-  datasource:
-    url: jdbc:h2:mem:testdb
-    driver-class-name: org.h2.Driver
+#  datasource:  # 암호화 후 config server에 옮김
+#    url: jdbc:h2:mem:testdb
+#    driver-class-name: org.h2.Driver
 
  # rabbitmq 정보
   rabbitmq: #호스트 정보 기술 => ms는 클라이언트

e-config-service/src/main/resources/bootstrap.yml

@@ -0,0 +1,3 @@
+# 대칭키
+encrypt:
+  key: jeeyoung2zizone

readme.md

@@ -1,44 +1,24 @@
-# Spring Cloud Config 
-
+# Micro Service 간 통신
 ``` text
-spring cloud config 로 yml파일 한번에 관리하기 
+RestTemplate 이용하기
 ```
-1. e-config-service
-2. d-user-service
-3. d-gateway-service
-4. ecommerce (Eureka Server) 
-
-## RabbitMq 설치 가이드
-
-[rabbitmq 설치 가이드 in Notion](https://absorbing-brain-061.notion.site/Rabbit-MQ-c093020f8d614a738e8903d3cd29878c)
-
-## 공통 Dependencies
-
-```text
-implementation 'org.springframework.boot:spring-boot-starter-actuator:2.7.2'
-implementation 'org.springframework.cloud:spring-cloud-starter-bootstrap:3.1.3'
-implementation 'org.springframework.cloud:spring-cloud-starter-bus-amqp:3.1.2'
+- userService에서 RestTemplate 이용
+- @LoadBalancer 사용으로 url을 간략화 할 수 있다.
+
+### Bean 등록
+```java
+    @Bean
+    @LoadBalanced 
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
 ```
 
-- amqp : 메시지 지향 미들웨어용 개방형 표준 응용 프로토콜
-  - rabbitmq 사용을 위해 추가함
-
-## yml 파일 설정
-
-```yaml
-spring:
-	rabbitmq:  
-	    host: 127.0.0.1
-	    port: 5672 
-	    username: guest
-	    password: guest
-
-management:
-  endpoints:
-    web:
-      exposure:
-        include:  busrefresh
-```
+### url 사용
 
-- rabbitMq server 주소와 정보 입력
-- busrefresh : 전체파일 refresh용 endpoint
+- 기존: http://lcoalhost:8000/order-service/*
+  - 게이트웨이 거친 버전 /order-service가 붙음
+
+- 변경후 : http://ORDER-SERVICE/*
+  - 유레카에서 가져온 버전  http://localhost:0/* 와 동일함   
+  - /order-service가 제거 됨