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dStrange6dStrange6
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controller, service and repo added
1 parent bc59a69 commit fa98729

13 files changed

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‎catalog-service/pom.xml‎

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<version>5.5.6</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>1.18.42</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<annotationProcessorPaths>
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<path>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-configuration-processor</artifactId>
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</path>
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<path>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>1.18.42</version>
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</path>
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</annotationProcessorPaths>
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</configuration>
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</plugin>

‎catalog-service/src/main/java/com/mayank/catalog_service/ApplicationProperties.java‎

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package com.mayank.catalog_service;
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import jakarta.validation.constraints.Min;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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import org.springframework.boot.context.properties.bind.DefaultValue;
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@ConfigurationProperties(prefix = "catalog")
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public record ApplicationProperties(
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@DefaultValue("10")
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@Min(1)
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int pageSize
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) {
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}

‎catalog-service/src/main/java/com/mayank/catalog_service/CatalogServiceApplication.java‎

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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.context.properties.ConfigurationPropertiesScan;
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@SpringBootApplication
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@ConfigurationPropertiesScan
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public class CatalogServiceApplication {
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public static void main(String[] args) {

‎catalog-service/src/main/java/com/mayank/catalog_service/domain/PagedResult.java‎

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package com.mayank.catalog_service.domain;
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import java.util.List;
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public record PagedResult<T>(
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List<T> data,
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long totalElements,
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int pageNumber,
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int totalPages,
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boolean isFirst,
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boolean isLast,
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boolean hasNext,
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boolean hasPrevious) {}
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‎catalog-service/src/main/java/com/mayank/catalog_service/domain/Product.java‎

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package com.mayank.catalog_service.domain;
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import java.math.BigDecimal;
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public record Product(
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String code,
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String name,
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String description,
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String imageUrl,
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BigDecimal price) { }

‎catalog-service/src/main/java/com/mayank/catalog_service/domain/ProductEntity.java‎

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package com.mayank.catalog_service.domain;
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import jakarta.persistence.*;
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import jakarta.validation.constraints.DecimalMin;
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import jakarta.validation.constraints.NotEmpty;
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import jakarta.validation.constraints.NotNull;
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import lombok.*;
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import java.math.BigDecimal;
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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@Entity
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@Table(name = "products")
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public class ProductEntity
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{
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@Id
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@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "product_id_generator")
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@SequenceGenerator(name = "product_id_generator", sequenceName = "product_id_seq")
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private Long id;
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@Column(nullable = false, unique = true)
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@NotEmpty(message = "Product code is required")
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private String code;
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@Column(nullable = false)
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@NotEmpty(message = "Product name is required")
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private String name;
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private String description;
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private String imageUrl;
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@Column(nullable = false)
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@NotNull(message = "Product price is required") @DecimalMin("0.1")
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private BigDecimal price;
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}

‎catalog-service/src/main/java/com/mayank/catalog_service/domain/ProductMapper.java‎

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package com.mayank.catalog_service.domain;
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public class ProductMapper
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{
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static Product toProduct(ProductEntity productEntity)
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{
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return new Product(
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productEntity.getCode(),
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productEntity.getName(),
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productEntity.getDescription(),
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productEntity.getImageUrl(),
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productEntity.getPrice()
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);
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}
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}

‎catalog-service/src/main/java/com/mayank/catalog_service/domain/ProductRepository.java‎

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package com.mayank.catalog_service.domain;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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interface ProductRepository extends JpaRepository<ProductEntity, Long> {
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}

‎catalog-service/src/main/java/com/mayank/catalog_service/domain/ProductService.java‎

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package com.mayank.catalog_service.domain;
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import com.mayank.catalog_service.ApplicationProperties;
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import jakarta.transaction.Transactional;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.domain.Sort;
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import org.springframework.stereotype.Service;
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@Service
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@Transactional
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public class ProductService
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{
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private final ProductRepository productRepository;
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private final ApplicationProperties applicationProperties;
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public ProductService(ProductRepository productRepository, ApplicationProperties applicationProperties) {
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this.productRepository = productRepository;
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this.applicationProperties = applicationProperties;
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}
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public PagedResult<Product> getProducts(int pageNo)
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{
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Sort sort = Sort.by("name").ascending();
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pageNo = pageNo <= 1 ? 0 : pageNo - 1;
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Pageable pageable = PageRequest.of(pageNo, applicationProperties.pageSize(), sort);
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Page<Product> productsPage = productRepository.findAll(pageable).map(ProductMapper::toProduct);
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return new PagedResult<>(
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productsPage.getContent(),
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productsPage.getTotalElements(),
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productsPage.getNumber() + 1,
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productsPage.getTotalPages(),
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productsPage.isFirst(),
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productsPage.isLast(),
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productsPage.hasNext(),
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productsPage.hasPrevious()
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);
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}
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}

‎catalog-service/src/main/java/com/mayank/catalog_service/web/controllers/ProductController.java‎

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package com.mayank.catalog_service.web.controllers;
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import com.mayank.catalog_service.domain.PagedResult;
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import com.mayank.catalog_service.domain.Product;
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import com.mayank.catalog_service.domain.ProductService;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import java.util.List;
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@RestController
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@RequestMapping("/api/products")
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public class ProductController
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{
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private final ProductService productService;
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public ProductController(ProductService productService) {
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this.productService = productService;
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}
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@GetMapping
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PagedResult<Product> getProducts(@RequestParam(name="page", defaultValue = "1")int pageNo)
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{
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return productService.getProducts(pageNo);
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}
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}

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