store-service 아이템 조회 api 추가

store-service/src/main/java/com/justpickup/storeservice/domain/item/dto/ItemDto.java

@@ -0,0 +1,49 @@
+package com.justpickup.storeservice.domain.item.dto;
+
+import com.justpickup.storeservice.domain.item.entity.Item;
+import com.justpickup.storeservice.global.entity.Yn;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+public class ItemDto {
+
+    private Long id;
+
+    private String name;
+
+    private Yn salesYn;
+
+    private Long price;
+
+    /*
+     private PhotoDto photoDto;
+     private CategoryDto categoryDto;
+     private StoreDto storeDto;
+     private List<ItemOptionDto> itemOptionDtoList;
+    */
+
+    // == 생성 메소드 == //
+    @Builder
+    public ItemDto(Long id, String name, Yn salesYn, Long price) {
+        this.id = id;
+        this.name = name;
+        this.salesYn = salesYn;
+        this.price = price;
+    }
+
+    public static ItemDto createItemDto(Item item) {
+        return ItemDto.builder()
+                .id(item.getId())
+                .name(item.getName())
+                .price(item.getPrice())
+                .salesYn(item.getSalesYn())
+                .build();
+    }
+
+    // TODO: 2022/02/03 queryDsl 쿼리 생성 시 구현 필요
+//    public static ItemDto createFullItemDto(Item item) {
+//        return null
+//    }
+
+}

store-service/src/main/java/com/justpickup/storeservice/domain/item/repository/ItemRepository.java

@@ -0,0 +1,7 @@
+package com.justpickup.storeservice.domain.item.repository;
+
+import com.justpickup.storeservice.domain.item.entity.Item;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ItemRepository extends JpaRepository<Item, Long> {
+}

store-service/src/main/java/com/justpickup/storeservice/domain/item/service/ItemService.java

@@ -0,0 +1,8 @@
+package com.justpickup.storeservice.domain.item.service;
+
+import com.justpickup.storeservice.domain.item.dto.ItemDto;
+
+public interface ItemService {
+
+    ItemDto findItemByItemId(Long itemId);
+}

store-service/src/main/java/com/justpickup/storeservice/domain/item/service/ItemServiceImpl.java

@@ -0,0 +1,29 @@
+package com.justpickup.storeservice.domain.item.service;
+
+import com.justpickup.storeservice.domain.item.dto.ItemDto;
+import com.justpickup.storeservice.domain.item.entity.Item;
+import com.justpickup.storeservice.domain.item.repository.ItemRepository;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.NoSuchElementException;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+@Slf4j
+public class ItemServiceImpl implements ItemService {
+
+    private final ItemRepository itemRepository;
+
+
+    @Override
+    public ItemDto findItemByItemId(Long itemId) {
+        Item findItem = itemRepository.findById(itemId)
+                .orElseThrow(NoSuchElementException::new);
+
+        return ItemDto.createItemDto(findItem);
+    }
+}

store-service/src/main/java/com/justpickup/storeservice/domain/item/web/ItemController.java

@@ -0,0 +1,53 @@
+package com.justpickup.storeservice.domain.item.web;
+
+import com.justpickup.storeservice.domain.item.dto.ItemDto;
+import com.justpickup.storeservice.domain.item.service.ItemService;
+import com.justpickup.storeservice.global.entity.Yn;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/item")
+public class ItemController {
+
+    private final ItemService itemService;
+
+    @GetMapping("/{itemId}")
+    public ResponseEntity getItem(@PathVariable("itemId") Long itemId) {
+        ItemDto itemByItemId = itemService.findItemByItemId(itemId);
+
+        GetItemResponse getItemResponse = new GetItemResponse(itemByItemId);
+        return ResponseEntity.status(HttpStatus.OK)
+                .body(new Result<>("OK", getItemResponse));
+    }
+
+    @Data @NoArgsConstructor @AllArgsConstructor
+    static class Result<T> {
+        private String message;
+        private T data;
+    }
+
+    @Data @NoArgsConstructor @AllArgsConstructor
+    static class GetItemResponse {
+        private Long id;
+        private String name;
+        private Yn salesYn;
+        private Long price;
+
+        public GetItemResponse(ItemDto itemDto) {
+            this.id = itemDto.getId();
+            this.name = itemDto.getName();
+            this.salesYn = itemDto.getSalesYn();
+            this.price = itemDto.getPrice();
+        }
+    }
+}