Exception handler and category children.

Author: manirDev

src/main/java/com/manir/springbootecommercerestapi/controller/ProductImageGalleryController.java

@@ -1,6 +1,5 @@
 package com.manir.springbootecommercerestapi.controller;
 
-import com.manir.springbootecommercerestapi.resource.ImageData;
 import com.manir.springbootecommercerestapi.service.ProductImageGalleryService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;

src/main/java/com/manir/springbootecommercerestapi/dto/CategoryDto.java

@@ -1,6 +1,10 @@
 package com.manir.springbootecommercerestapi.dto;
 
-import com.manir.springbootecommercerestapi.resource.Product;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import com.manir.springbootecommercerestapi.model.Category;
 import lombok.Data;
 
 import java.util.Set;
@@ -14,5 +18,8 @@ public class CategoryDto {
     private String description;
     private String status;
 
+    //private Category parent;
+    private Set<Category> children;
+
     //private Set<ProductDto> products;
 }

src/main/java/com/manir/springbootecommercerestapi/dto/ProductDto.java

@@ -1,11 +1,16 @@
 package com.manir.springbootecommercerestapi.dto;
-import com.manir.springbootecommercerestapi.resource.ImageData;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
 import lombok.Data;
 
-import java.util.List;
 import java.util.Set;
 
 @Data
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonNaming(value = PropertyNamingStrategy.SnakeCaseStrategy.class)
+@JsonIgnoreProperties({"hibernate_lazy_initializer", "handler"})
 public class ProductDto {
     private Long id;
     private String title;

src/main/java/com/manir/springbootecommercerestapi/exception/EcommerceApiException.java

@@ -0,0 +1,28 @@
+package com.manir.springbootecommercerestapi.exception;
+
+import org.springframework.http.HttpStatus;
+
+public class EcommerceApiException extends RuntimeException{
+    private String message;
+    private HttpStatus status;
+
+    public EcommerceApiException(String message, HttpStatus status) {
+        this.message = message;
+        this.status = status;
+    }
+
+    public EcommerceApiException(String message, String message1, HttpStatus status) {
+        super(message);
+        this.message = message1;
+        this.status = status;
+    }
+
+    @Override
+    public String getMessage() {
+        return message;
+    }
+
+    public HttpStatus getStatus() {
+        return status;
+    }
+}

src/main/java/com/manir/springbootecommercerestapi/exception/GlobalExceptionHandler.java

@@ -0,0 +1,37 @@
+package com.manir.springbootecommercerestapi.exception;
+
+import com.manir.springbootecommercerestapi.response.ErrorDetail;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.context.request.WebRequest;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+import java.util.Date;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
+
+    //Resource not found handler
+    @ExceptionHandler(ResourceNotFoundException.class)
+    public ResponseEntity<ErrorDetail> handleResourceNotFoundException(ResourceNotFoundException exception, WebRequest webRequest){
+        ErrorDetail errorDetail = new ErrorDetail(new Date(), exception.getMessage(), webRequest.getDescription(false));
+        return new ResponseEntity<>(errorDetail, HttpStatus.NOT_FOUND);
+    }
+
+    //Ecommerce exception handler
+    @ExceptionHandler(EcommerceApiException.class)
+    public ResponseEntity<ErrorDetail> handleEcommerceApiException(EcommerceApiException exception, WebRequest webRequest){
+        ErrorDetail errorDetail = new ErrorDetail(new Date(), exception.getMessage(), webRequest.getDescription(false));
+        return  new ResponseEntity<>(errorDetail, HttpStatus.BAD_REQUEST);
+    }
+
+    //Global Exception handler
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ErrorDetail> handleGlobalException(Exception exception, WebRequest webRequest){
+        ErrorDetail errorDetail = new ErrorDetail(new Date(), exception.getMessage(), webRequest.getDescription(false));
+        return new ResponseEntity<>(errorDetail, HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+}

src/main/java/com/manir/springbootecommercerestapi/exception/ResourceNotFoundException.java

@@ -3,7 +3,7 @@
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.ResponseStatus;
 
-@ResponseStatus(value = HttpStatus.BAD_REQUEST)
+@ResponseStatus(value = HttpStatus.NOT_FOUND)
 public class ResourceNotFoundException extends RuntimeException{
    private String resourceName;
    private Long fieldValue;

src/main/java/com/manir/springbootecommercerestapi/resource/Category.java renamed to src/main/java/com/manir/springbootecommercerestapi/model/Category.java

@@ -1,10 +1,10 @@
-package com.manir.springbootecommercerestapi.resource;
+package com.manir.springbootecommercerestapi.model;
 
+import com.fasterxml.jackson.annotation.*;
 import lombok.*;
 
 import javax.persistence.*;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Set;
 
 @AllArgsConstructor
@@ -28,12 +28,14 @@ public class Category {
     private String status;
 
     //relation between parent and child categories
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
     @JoinColumn(name = "parent_id")
     private Category parent;
-    @OneToMany(mappedBy = "parent")
+    @OneToMany(mappedBy = "parent", fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+    @JsonIgnore
     private Set<Category> children = new HashSet<>();
 
+
     //relation between category and product
     @OneToMany(mappedBy = "category", cascade = CascadeType.ALL, orphanRemoval = true)
     private Set<Product> products = new HashSet<>();

src/main/java/com/manir/springbootecommercerestapi/resource/Comment.java renamed to src/main/java/com/manir/springbootecommercerestapi/model/Comment.java

@@ -1,4 +1,4 @@
-package com.manir.springbootecommercerestapi.resource;
+package com.manir.springbootecommercerestapi.model;
 
 import lombok.*;
 

src/main/java/com/manir/springbootecommercerestapi/resource/ImageData.java renamed to src/main/java/com/manir/springbootecommercerestapi/model/ImageData.java

@@ -1,4 +1,4 @@
-package com.manir.springbootecommercerestapi.resource;
+package com.manir.springbootecommercerestapi.model;
 
 import lombok.*;
 

src/main/java/com/manir/springbootecommercerestapi/resource/Product.java renamed to src/main/java/com/manir/springbootecommercerestapi/model/Product.java

@@ -1,9 +1,8 @@
-package com.manir.springbootecommercerestapi.resource;
+package com.manir.springbootecommercerestapi.model;
 
 import lombok.*;
 
 import javax.persistence.*;
-import java.util.List;
 import java.util.Set;
 
 @AllArgsConstructor

src/main/java/com/manir/springbootecommercerestapi/repository/CategoryRepository.java

@@ -1,6 +1,6 @@
 package com.manir.springbootecommercerestapi.repository;
 
-import com.manir.springbootecommercerestapi.resource.Category;
+import com.manir.springbootecommercerestapi.model.Category;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface CategoryRepository extends JpaRepository<Category, Long> {

src/main/java/com/manir/springbootecommercerestapi/repository/CommentRepository.java

@@ -1,10 +1,9 @@
 package com.manir.springbootecommercerestapi.repository;
 
-import com.manir.springbootecommercerestapi.resource.Comment;
+import com.manir.springbootecommercerestapi.model.Comment;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
-import java.util.Optional;
 
 public interface CommentRepository extends JpaRepository<Comment, Long> {
     List<Comment> findByProductId(Long productId);

src/main/java/com/manir/springbootecommercerestapi/repository/ProductImageGalleryRepository.java

@@ -1,6 +1,6 @@
 package com.manir.springbootecommercerestapi.repository;
 
-import com.manir.springbootecommercerestapi.resource.ImageData;
+import com.manir.springbootecommercerestapi.model.ImageData;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ProductImageGalleryRepository extends JpaRepository<ImageData, Long> {

src/main/java/com/manir/springbootecommercerestapi/repository/ProductRepository.java

@@ -1,11 +1,8 @@
 package com.manir.springbootecommercerestapi.repository;
 
-import com.manir.springbootecommercerestapi.resource.Comment;
-import com.manir.springbootecommercerestapi.resource.Product;
+import com.manir.springbootecommercerestapi.model.Product;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-import java.util.List;
-
 public interface ProductRepository extends JpaRepository<Product, Long> {
 
 }

src/main/java/com/manir/springbootecommercerestapi/response/ErrorDetail.java

@@ -0,0 +1,27 @@
+package com.manir.springbootecommercerestapi.response;
+
+import java.util.Date;
+
+public class ErrorDetail {
+    private Date timestamp;
+    private String message;
+    private String details;
+
+    public ErrorDetail(Date timestamp, String message, String details) {
+        this.timestamp = timestamp;
+        this.message = message;
+        this.details = details;
+    }
+
+    public Date getTimestamp() {
+        return timestamp;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public String getDetails() {
+        return details;
+    }
+}

src/main/java/com/manir/springbootecommercerestapi/service/CategoryService.java

@@ -12,5 +12,6 @@ public interface CategoryService {
     CategoryDto updateCategory(CategoryDto categoryDto, Long categoryId);
     void deleteCategory(Long categoryId);
 
+    //List<CategoryDto> findChildren(Long parentId);
 
 }

src/main/java/com/manir/springbootecommercerestapi/service/Impl/CategoryServiceImpl.java

@@ -3,7 +3,7 @@
 import com.manir.springbootecommercerestapi.dto.CategoryDto;
 import com.manir.springbootecommercerestapi.exception.ResourceNotFoundException;
 import com.manir.springbootecommercerestapi.repository.CategoryRepository;
-import com.manir.springbootecommercerestapi.resource.Category;
+import com.manir.springbootecommercerestapi.model.Category;
 import com.manir.springbootecommercerestapi.service.CategoryService;
 import org.modelmapper.ModelMapper;
 import org.springframework.stereotype.Service;

src/main/java/com/manir/springbootecommercerestapi/service/Impl/CommentServiceImpl.java

@@ -4,8 +4,8 @@
 import com.manir.springbootecommercerestapi.exception.ResourceNotFoundException;
 import com.manir.springbootecommercerestapi.repository.CommentRepository;
 import com.manir.springbootecommercerestapi.repository.ProductRepository;
-import com.manir.springbootecommercerestapi.resource.Comment;
-import com.manir.springbootecommercerestapi.resource.Product;
+import com.manir.springbootecommercerestapi.model.Comment;
+import com.manir.springbootecommercerestapi.model.Product;
 import com.manir.springbootecommercerestapi.service.CommentService;
 import org.modelmapper.ModelMapper;
 import org.springframework.stereotype.Service;

src/main/java/com/manir/springbootecommercerestapi/service/Impl/ProductImageGalleryServiceImpl.java

@@ -3,8 +3,8 @@
 import com.manir.springbootecommercerestapi.exception.ResourceNotFoundException;
 import com.manir.springbootecommercerestapi.repository.ProductImageGalleryRepository;
 import com.manir.springbootecommercerestapi.repository.ProductRepository;
-import com.manir.springbootecommercerestapi.resource.ImageData;
-import com.manir.springbootecommercerestapi.resource.Product;
+import com.manir.springbootecommercerestapi.model.ImageData;
+import com.manir.springbootecommercerestapi.model.Product;
 import com.manir.springbootecommercerestapi.service.ProductImageGalleryService;
 import com.manir.springbootecommercerestapi.utils.ImageUtils;
 import org.springframework.stereotype.Service;

src/main/java/com/manir/springbootecommercerestapi/service/Impl/ProductServiceImpl.java

@@ -4,11 +4,9 @@
 import com.manir.springbootecommercerestapi.exception.ResourceNotFoundException;
 import com.manir.springbootecommercerestapi.repository.CategoryRepository;
 import com.manir.springbootecommercerestapi.repository.ProductRepository;
-import com.manir.springbootecommercerestapi.resource.Category;
-import com.manir.springbootecommercerestapi.resource.ImageData;
-import com.manir.springbootecommercerestapi.resource.Product;
+import com.manir.springbootecommercerestapi.model.Category;
+import com.manir.springbootecommercerestapi.model.Product;
 import com.manir.springbootecommercerestapi.service.ProductService;
-import com.manir.springbootecommercerestapi.utils.ImageUtils;
 import org.modelmapper.ModelMapper;
 import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;

src/main/java/com/manir/springbootecommercerestapi/service/ProductImageGalleryService.java

@@ -1,6 +1,6 @@
 package com.manir.springbootecommercerestapi.service;
 
-import com.manir.springbootecommercerestapi.resource.ImageData;
+import com.manir.springbootecommercerestapi.model.ImageData;
 import org.springframework.web.multipart.MultipartFile;
 
 public interface ProductImageGalleryService {