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feat(order, point): 주문 생성 유스케이스 및 포인트 차감 도메인 구현
- Order / OrderItem 엔티티 구현 - 상품 재고 차감, 포인트 차감 도메인 로직 추가 - Order 도메인 서비스 + Facade 조합 구현 - OrderRepository, PointRepository 인터페이스 정의 - 정상 주문/재고부족 포인트/부족 단위 / 통합 테스트 작성
1 parent 7e0ac82 commit 1087ea2

21 files changed

Lines changed: 969 additions & 24 deletions

‎apps/commerce-api/src/main/java/com/loopers/application/order/CreateOrderCommand.java‎

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package com.loopers.application.order;
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import java.util.List;
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/**
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* packageName : com.loopers.application.order
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* fileName : CreateOrderCommand
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* author : byeonsungmun
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* date : 2025. 11. 14.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 14. byeonsungmun 최초 생성
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*/
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public record CreateOrderCommand(
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String userId,
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List<OrderItemCommand> items
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) {}

‎apps/commerce-api/src/main/java/com/loopers/application/order/OrderFacade.java‎

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package com.loopers.application.order;
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import com.loopers.domain.order.Order;
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import com.loopers.domain.order.OrderItem;
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import com.loopers.domain.order.OrderService;
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import com.loopers.domain.order.OrderStatus;
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import com.loopers.domain.point.Point;
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import com.loopers.domain.point.PointService;
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import com.loopers.domain.product.Product;
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import com.loopers.domain.product.ProductService;
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import com.loopers.support.error.CoreException;
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import com.loopers.support.error.ErrorType;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Component;
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import org.springframework.transaction.annotation.Transactional;
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/**
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* packageName : com.loopers.application.order
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* fileName : OrderFacade
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* author : byeonsungmun
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* date : 2025. 11. 13.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 13. byeonsungmun 최초 생성
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*/
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@Slf4j
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@Component
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@RequiredArgsConstructor
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public class OrderFacade {
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private final OrderService orderService;
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private final ProductService productService;
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private final PointService pointService;
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@Transactional
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public OrderInfo createOrder(CreateOrderCommand command) {
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if (command == null || command.items() == null || command.items().isEmpty()) {
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throw new CoreException(ErrorType.NOT_FOUND, "상품 정보가 비어있습니다");
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}
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Order order = Order.create(command.userId());
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for (OrderItemCommand itemCommand : command.items()) {
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//상품가져오고
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Product product = productService.getProduct(itemCommand.productId());
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// 재고감소
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product.decreaseStock(itemCommand.quantity());
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// OrderItem생성
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OrderItem orderItem = OrderItem.create(
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product.getId(),
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product.getName(),
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itemCommand.quantity(),
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product.getPrice());
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order.addOrderItem(orderItem);
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orderItem.setOrder(order);
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}
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//총 가격구하고
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long totalAmount = order.getOrderItems().stream()
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.mapToLong(OrderItem::getAmount)
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.sum();
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order.updateTotalAmount(totalAmount);
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Point point = pointService.findPointByUserId(command.userId());
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point.use(totalAmount);
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//저장
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Order saved = orderService.createOrder(order);
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saved.updateStatus(OrderStatus.COMPLETE);
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return OrderInfo.from(saved);
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}
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}

‎apps/commerce-api/src/main/java/com/loopers/application/order/OrderInfo.java‎

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package com.loopers.application.order;
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import com.loopers.domain.order.Order;
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import com.loopers.domain.order.OrderStatus;
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import java.time.LocalDateTime;
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import java.util.List;
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/**
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* packageName : com.loopers.application.order
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* fileName : OrderInfo
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* author : byeonsungmun
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* date : 2025. 11. 14.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 14. byeonsungmun 최초 생성
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*/
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public record OrderInfo(
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Long orderId,
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String userId,
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Long totalAmount,
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OrderStatus status,
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LocalDateTime createdAt,
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List<OrderItemInfo> items
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) {
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public static OrderInfo from(Order order) {
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List<OrderItemInfo> itemInfos = order.getOrderItems().stream()
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.map(OrderItemInfo::from)
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.toList();
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return new OrderInfo(
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order.getId(),
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order.getUserId(),
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order.getTotalAmount(),
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order.getStatus(),
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order.getCreatedAt(),
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itemInfos
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);
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}
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}

‎apps/commerce-api/src/main/java/com/loopers/application/order/OrderItemCommand.java‎

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package com.loopers.application.order;
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/**
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* packageName : com.loopers.application.order
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* fileName : OrderItemCommand
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* author : byeonsungmun
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* date : 2025. 11. 14.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 14. byeonsungmun 최초 생성
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*/
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public record OrderItemCommand(
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Long productId,
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Long quantity
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) {}

‎apps/commerce-api/src/main/java/com/loopers/application/order/OrderItemInfo.java‎

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package com.loopers.application.order;
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import com.loopers.domain.order.OrderItem;
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/**
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* packageName : com.loopers.application.order
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* fileName : OrderInfo
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* author : byeonsungmun
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* date : 2025. 11. 13.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 13. byeonsungmun 최초 생성
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*/
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public record OrderItemInfo(
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Long productId,
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String productName,
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Long quantity,
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Long price,
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Long amount
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) {
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public static OrderItemInfo from(OrderItem item) {
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return new OrderItemInfo(
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item.getProductId(),
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item.getProductName(),
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item.getQuantity(),
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item.getPrice(),
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item.getAmount()
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);
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}
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}

‎apps/commerce-api/src/main/java/com/loopers/application/point/PointInfo.java‎

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public static PointInfo from(Point info) {
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return new PointInfo(
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info.getUserId(),
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info.getAmount()
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info.getBalance()
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);
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}
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‎apps/commerce-api/src/main/java/com/loopers/domain/order/Order.java‎

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package com.loopers.domain.order;
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import com.loopers.support.error.CoreException;
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import com.loopers.support.error.ErrorType;
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import jakarta.persistence.*;
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import lombok.Getter;
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import java.time.LocalDateTime;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* packageName : com.loopers.domain.order
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* fileName : Order
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* author : byeonsungmun
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* date : 2025. 11. 11.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 11. byeonsungmun 최초 생성
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*/
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@Entity
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@Table(name = "orders")
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@Getter
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public class Order {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Column(name = "ref_user_id", nullable = false)
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private String userId;
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@Column(nullable = false)
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private Long totalAmount;
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@Enumerated(EnumType.STRING)
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private OrderStatus status;
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@Column(nullable = false)
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private LocalDateTime createdAt;
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@OneToMany(mappedBy = "order", cascade = CascadeType.ALL, orphanRemoval = true)
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private List<OrderItem> orderItems = new ArrayList<>();
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protected Order() {}
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private Order(String userId, OrderStatus status) {
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this.userId = requiredValidUserId(userId);
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this.totalAmount = 0L;
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this.status = requiredValidStatus(status);
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this.createdAt = LocalDateTime.now();
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}
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public static Order create(String userId) {
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return new Order(userId, OrderStatus.PENDING);
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}
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public void addOrderItem(OrderItem orderItem) {
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this.orderItems.add(orderItem);
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}
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private OrderStatus requiredValidStatus(OrderStatus status) {
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if (status == null) {
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throw new CoreException(ErrorType.BAD_REQUEST, "주문 상태는 필수 입니다.");
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}
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return status;
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}
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private String requiredValidUserId(String userId) {
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if (userId == null || userId.isEmpty()) {
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throw new CoreException(ErrorType.BAD_REQUEST, "사용자 ID는 필수 입니다.");
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}
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return userId;
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}
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public void updateTotalAmount(long totalAmount) {
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this.totalAmount = totalAmount;
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}
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public void updateStatus(OrderStatus status) {
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this.status = status;
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}
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}

‎apps/commerce-api/src/main/java/com/loopers/domain/order/OrderItem.java‎

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package com.loopers.domain.order;
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import com.loopers.support.error.CoreException;
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import com.loopers.support.error.ErrorType;
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import jakarta.persistence.*;
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import lombok.Getter;
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import lombok.Setter;
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/**
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* packageName : com.loopers.domain.order
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* fileName : OrderItem
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* author : byeonsungmun
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* date : 2025. 11. 11.
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* description :
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* ===========================================
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* DATE AUTHOR NOTE
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* -------------------------------------------
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* 2025. 11. 11. byeonsungmun 최초 생성
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*/
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@Entity
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@Table(name = "order_item")
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@Getter
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public class OrderItem {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Setter
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "order_id", nullable = false)
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private Order order;
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@Column(name = "ref_product_id", nullable = false)
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private Long productId;
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@Column(name = "ref_product_name", nullable = false)
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private String productName;
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@Column(nullable = false)
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private Long quantity;
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@Column(nullable = false)
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private Long price;
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protected OrderItem() {}
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private OrderItem(Long productId, String productName, Long quantity, Long price) {
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this.productId = requiredValidProductId(productId);
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this.productName = requiredValidProductName(productName);
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this.quantity = requiredQuantity(quantity);
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this.price = requiredPrice(price);
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}
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public static OrderItem create(Long productId, String productName, Long quantity, Long price) {
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return new OrderItem(productId, productName, quantity, price);
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}
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public Long getAmount() {
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return quantity * price;
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}
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private Long requiredValidProductId(Long productId) {
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if (productId == null || productId <= 0) {
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throw new CoreException(ErrorType.BAD_REQUEST, "상품 ID는 필수입니다.");
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}
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return productId;
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}
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private String requiredValidProductName(String productName) {
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if (productName == null || productName.isEmpty()) {
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throw new CoreException(ErrorType.BAD_REQUEST, "상품명은 필수입니다.");
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}
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return productName;
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}
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private Long requiredQuantity(Long quantity) {
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if (quantity == null || quantity <= 0) {
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throw new CoreException(ErrorType.BAD_REQUEST, "수량은 1개 이상이어야 합니다.");
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}
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return quantity;
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}
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private Long requiredPrice(Long price) {
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if (price == null || price < 0) {
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throw new CoreException(ErrorType.BAD_REQUEST, "가격은 0원 이상이어야 합니다.");
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}
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return price;
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}
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}

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