4주차 과제- 고양이 장난감가게 만들기

app/src/main/java/com/codesoom/assignment/controller/ProductController.java

@@ -0,0 +1,57 @@
+package com.codesoom.assignment.controller;
+
+import com.codesoom.assignment.dto.ProductDTO;
+import com.codesoom.assignment.service.ProductSearchService;
+import com.codesoom.assignment.service.ProductService;
+import com.codesoom.assignment.domain.Product;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@Slf4j
+@RestController
+@RequestMapping("/products")
+public class ProductController {
+
+    private final ProductService service;
+    private final ProductSearchService searchService;
+
+    public ProductController(ProductService service , ProductSearchService searchService) {
+        this.service = service;
+        this.searchService = searchService;
+    }
+
+    @GetMapping
+    public Iterable<Product> findAllProduct(){
+        return searchService.findAll();
+    }
+
+    @GetMapping("{id}")
+    public Product findProduct(@PathVariable Long id){
+        return searchService.findById(id);
+    }
+
+    @PostMapping
+    public Product createProduct(@RequestBody ProductDTO productDTO) {
+        return service.save(productDTO.toProduct());
+    }
+
+    @PatchMapping("{id}")
+    public Product updateProduct(@PathVariable Long id,
+                                 @RequestBody Product product){
+        return service.update(id , product);
+    }
+
+    @DeleteMapping("{id}")
+    public void deleteProduct(@PathVariable Long id){
+        service.deleteById(id);
+    }
+}

app/src/main/java/com/codesoom/assignment/controller/ProductControllerAdvice.java

@@ -0,0 +1,21 @@
+package com.codesoom.assignment.controller;
+
+import com.codesoom.assignment.dto.ErrorResult;
+import com.codesoom.assignment.exception.ResourceNotFoundException;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+
+@Slf4j
+@RestControllerAdvice(basePackageClasses = ProductController.class)
+public class ProductControllerAdvice {
+
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    @ExceptionHandler(ResourceNotFoundException.class)
+    public ErrorResult resourceNotFound(ResourceNotFoundException e){
+        return new ErrorResult(e.getMessage());
+    }
+}

app/src/main/java/com/codesoom/assignment/domain/Product.java

@@ -0,0 +1,37 @@
+package com.codesoom.assignment.domain;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Getter
+@AllArgsConstructor
+@NoArgsConstructor
+@EqualsAndHashCode
+@ToString
+public class Product {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+    private String maker;
+    private int price;
+    private String fileName;
+
+    public Product updateProduct(Product update){
+        this.name = update.getName();
+        this.maker = update.getMaker();
+        this.price = update.getPrice();
+        this.fileName = update.getFileName();
+        return this;
+    }
+}

app/src/main/java/com/codesoom/assignment/dto/ErrorResult.java

@@ -0,0 +1,13 @@
+package com.codesoom.assignment.dto;
+
+
+import lombok.Getter;
+
+@Getter
+public class ErrorResult {
+    private final String message;
+
+    public ErrorResult(String message) {
+        this.message = message;
+    }
+}

app/src/main/java/com/codesoom/assignment/dto/ProductDTO.java

@@ -0,0 +1,35 @@
+package com.codesoom.assignment.dto;
+
+import com.codesoom.assignment.domain.Product;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+import lombok.ToString;
+
+import javax.validation.constraints.NotNull;
+
+
+@ToString
+@Getter
+public class ProductDTO {
+
+    private final String name;
+    private final String maker;
+    private final int price;
+    private final String fileName;
+
+    @JsonCreator
+    public ProductDTO(@JsonProperty("name") String name,
+                      @JsonProperty("maker") String maker,
+                      @JsonProperty("price") int price,
+                      @JsonProperty("fileName") String fileName) {
+        this.name = name;
+        this.maker = maker;
+        this.price = price;
+        this.fileName = fileName;
+    }
+
+    public Product toProduct(){
+        return new Product(null , this.name , this.maker , this.price , this.fileName);
+    }
+}

app/src/main/java/com/codesoom/assignment/exception/BadRequestException.java

@@ -0,0 +1,7 @@
+package com.codesoom.assignment.exception;
+
+public class BadRequestException extends RuntimeException{
+    public BadRequestException(String message) {
+        super(message);
+    }
+}

app/src/main/java/com/codesoom/assignment/exception/ResourceNotFoundException.java

@@ -0,0 +1,7 @@
+package com.codesoom.assignment.exception;
+
+public class ResourceNotFoundException extends RuntimeException{
+    public ResourceNotFoundException(String message) {
+        super(message);
+    }
+}

app/src/main/java/com/codesoom/assignment/repository/ProductJPARepository.java

@@ -0,0 +1,9 @@
+package com.codesoom.assignment.repository;
+
+import com.codesoom.assignment.domain.Product;
+import org.springframework.data.repository.CrudRepository;
+
+public interface ProductJPARepository
+        extends CrudRepository<Product, Long> {
+
+}

app/src/main/java/com/codesoom/assignment/service/ProductSearchService.java

@@ -0,0 +1,38 @@
+package com.codesoom.assignment.service;
+
+import com.codesoom.assignment.domain.Product;
+import com.codesoom.assignment.exception.ResourceNotFoundException;
+import com.codesoom.assignment.repository.ProductJPARepository;
+import lombok.AllArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional(readOnly = true)
+@AllArgsConstructor
+public class ProductSearchService {
+
+    private final ProductJPARepository repository;
+
+    /**
+     * 모든 엔티티를 반환합니다
+     *
+     * @return Iterable<엔티티>
+     */
+    public Iterable<Product> findAll(){
+        return repository.findAll();
+    }
+
+    /**
+     * 식별자와 같은 엔티티를 찾아 반환합니다
+     *
+     * @param   id
+     * @return  id에 해당하는 자원
+     * @throws ResourceNotFoundException
+     *          id에 해당하는 자원이 존재하지 않을 때 던져진다
+     */
+    public Product findById(Long id){
+        return repository.findById(id)
+                .orElseThrow(() -> new ResourceNotFoundException("상품이 존재하지 않습니다. id : " + id));
+    }
+}

app/src/main/java/com/codesoom/assignment/service/ProductService.java

@@ -0,0 +1,52 @@
+package com.codesoom.assignment.service;
+
+import com.codesoom.assignment.domain.Product;
+import com.codesoom.assignment.exception.ResourceNotFoundException;
+import com.codesoom.assignment.repository.ProductJPARepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Optional;
+
+@Service
+@Transactional
+public class ProductService{
+
+    private final ProductJPARepository repository;
+
+    public ProductService(ProductJPARepository repository) {
+        this.repository = repository;
+    }
+
+    /**
+     * 주어진 엔티티를 저장합니다
+     *
+     * @param   product
+     * @return  저장된 product
+     */
+    public Product save(Product product){
+        return repository.save(product);
+    }
+
+    /**
+     * id에 해당하는 엔티티의 정보를 넘겨받은 엔티티로 대체한다
+     * id는 변경되지 않는다
+     * @param id 엔티티의 식별자
+     * @param product 대체할 엔티티의 정보
+     * @return 수정된 product
+     */
+    public Product update(Long id , Product product){
+        Optional<Product> optionalProduct = repository.findById(id);
+        optionalProduct
+                .orElseThrow(() -> new ResourceNotFoundException("상품이 존재하지 않습니다. id : " + id));
+        return optionalProduct.map(p -> p.updateProduct(product)).get();
+    }
+
+    /**
+     * id에 해당하는 엔티티를 삭제한다
+     * @param id 엔티티의 식별자
+     */
+    public void deleteById(Long id){
+        repository.deleteById(id);
+    }
+}

app/src/main/resources/application.yml

@@ -3,4 +3,4 @@ spring:
     url: jdbc:h2:~/data/demo
   jpa:
     hibernate:
-      ddl-auto: update
+      ddl-auto: create