@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("mediasoft.dev.productapi.rest"))
                .paths(PathSelectors.any())
                .build();
    }
}

server.port=8081
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/product_api?serverTimezone=UTC
spring.jpa.hibernate.ddl-auto=update

@RequestMapping(value = "/{id}")
    public ResponseEntity<Product> getProduct(@PathVariable(name = "id") Long id) {
        Optional<Product> opt = pdao.findById(id);
        if (!opt.isPresent()) {
            return ResponseEntity.noContent().build();
        }
        return ResponseEntity.ok(opt.get());
    }

    @PostMapping
    public ResponseEntity<Product> addProduct(@RequestBody Product product) {
        Product newProd = pdao.save(product);
        return ResponseEntity.ok(newProd);
    }

@Data @AllArgsConstructor @NoArgsConstructor @Builder
@Entity
@Table(name = "products")
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    @Column(unique = true, nullable = false)
    private String code;
    private String name;
    private String description;
    private Double price;
    private Double stock;
    @Column(length = 512)
    private String image;
    private String status;
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "category_id")
    @JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
    private Category category;
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "created_at")
    private Date createdAt;

    @PrePersist
    public void prePersist() {
        this.createdAt = new Date();
    }
}

@Repository
public interface ProductDAO extends JpaRepository<Product,Long> {}