Spring Boot를 사용하여 첫 번째 마이크로서비스 시스템 구축: 초보자 가이드

spring.datasource.url=jdbc:mysql://localhost:3306/orderservice spring.datasource.username=root spring.datasource.password=yourpassword spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect server.port=8081

package com.ordersystem.orderservice.model; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import javax.persistence.*; @Data @AllArgsConstructor @NoArgsConstructor @Entity @Table(name = "orders") public class Order { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String product; private int quantity; private double price; }

package com.ordersystem.orderservice.repository; import com.ordersystem.orderservice.model.Order; import org.springframework.data.jpa.repository.JpaRepository; public interface OrderRepository extends JpaRepository { }

package com.ordersystem.orderservice.service; import com.ordersystem.orderservice.model.Order; import com.ordersystem.orderservice.repository.OrderRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class OrderService { @Autowired private OrderRepository orderRepository; public List getAllOrders() { return orderRepository.findAll(); } public Order getOrderById(Long id) { return orderRepository.findById(id).orElse(null); } public Order createOrder(Order order) { return orderRepository.save(order); } public void deleteOrder(Long id) { orderRepository.deleteById(id); } }

package com.ordersystem.orderservice.controller; import com.ordersystem.orderservice.model.Order; import com.ordersystem.orderservice.service.OrderService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; @RestController @RequestMapping("/api/orders") public class OrderController { @Autowired private OrderService orderService; @GetMapping public List getAllOrders() { return orderService.getAllOrders(); } @GetMapping("/{id}") public Order getOrderById(@PathVariable Long id) { return orderService.getOrderById(id); } @PostMapping public Order createOrder(@RequestBody Order order) { return orderService.createOrder(order); } @DeleteMapping("/{id}") public void deleteOrder(@PathVariable Long id) { orderService.deleteOrder(id); } }

spring.data.mongodb.uri=mongodb://localhost:27017/inventoryservice server.port=8082

package com.ordersystem.inventoryservice.model; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import org.springframework.data.annotation.Id; import org.springframework.data.mongodb.core.mapping.Document; @Data @AllArgsConstructor @NoArgsConstructor @Document(collection = "inventory") public class InventoryItem { @Id private String id; private String product; private int quantity; }

package com.ordersystem.inventoryservice.repository; import com.ordersystem.inventoryservice.model.InventoryItem; import org.springframework.data.mongodb.repository.MongoRepository; public interface InventoryRepository extends MongoRepository { }

package com.ordersystem.inventoryservice.service; import com.ordersystem.inventoryservice.model.InventoryItem; import com.ordersystem.inventoryservice.repository.InventoryRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class InventoryService { @Autowired private InventoryRepository inventoryRepository; public List getAllItems() { return inventoryRepository.findAll(); } public InventoryItem getItemById(String id) { return inventoryRepository.findById(id).orElse(null); } public InventoryItem createItem(InventoryItem item) { return inventoryRepository.save(item); } public void deleteItem(String id) { inventoryRepository.deleteById(id); } }

package com.ordersystem.inventoryservice.controller; import com.ordersystem.inventoryservice.model.InventoryItem; import com.ordersystem.inventoryservice.service.InventoryService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; @RestController @RequestMapping("/api/inventory") public class InventoryController { @Autowired private InventoryService inventoryService; @GetMapping public List getAllItems() { return inventoryService.getAllItems(); } @GetMapping("/{id}") public InventoryItem getItemById(@PathVariable String id) { return inventoryService.getItemById(id); } @PostMapping public InventoryItem createItem(@RequestBody InventoryItem item) { return inventoryService.createItem(item); } @DeleteMapping("/{id}") public void deleteItem(@PathVariable String id) { inventoryService.delete Item(id); } }

server.port=8761 eureka.client.register-with-eureka=false eureka.client.fetch-registry=false

package com.ordersystem.eurekaserver; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }

 org.springframework.cloud spring-cloud-starter-netflix-eureka-client 

eureka.client.service-url.defaultZone=http://localhost:8761/eureka/ spring.application.name=order-service

eureka.client.service-url.defaultZone=http://localhost:8761/eureka/ spring.application.name=inventory-service

server: port: 8080 spring: application: name: api-gateway cloud: gateway: routes: - id: order-service uri: lb://order-service predicates: - Path=/api/orders/** - id: inventory-service uri: lb://inventory-service predicates: - Path=/api/inventory/** eureka: client: service-url: defaultZone: http://localhost:8761/eureka/

package com.ordersystem.apigateway; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; @SpringBootApplication @EnableDiscoveryClient public class ApiGatewayApplication { public static void main(String[] args) { SpringApplication.run(ApiGatewayApplication.class, args); } }