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Commit 2649ee8

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Mohaned Atef
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added application.properties file for springboot, added controller classes and used the CLI main class from the previous submission and enhanced upon it
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8 files changed

+188
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‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/EcommerceApp.java‎

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package com.iluwatar.monolithic;
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import com.iluwatar.monolithic.controller.OrderCon;
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import com.iluwatar.monolithic.controller.ProductCon;
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import com.iluwatar.monolithic.controller.UserCon;
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import com.iluwatar.monolithic.model.Products;
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import com.iluwatar.monolithic.model.User;
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import java.nio.charset.StandardCharsets;
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import java.util.Scanner;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* Main entry point for the Monolithic E-commerce application.
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*/
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@SpringBootApplication
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public class EcommerceApp implements CommandLineRunner {
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private static final Logger log = LogManager.getLogger(EcommerceApp.class);
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private final UserCon userService;
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private final ProductCon productService;
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private final OrderCon orderService;
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public EcommerceApp(UserCon userService, ProductCon productService, OrderCon orderService) {
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this.userService = userService;
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this.productService = productService;
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this.orderService = orderService;
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}
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public static void main(String... args) {
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SpringApplication.run(EcommerceApp.class, args);
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}
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@Override
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public void run(String... args) {
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Scanner scanner = new Scanner(System.in, StandardCharsets.UTF_8);
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log.info("Welcome to the Monolithic E-commerce CLI!");
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while (true) {
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log.info("\nChoose an option:");
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log.info("1. Register User");
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log.info("2. Add Product");
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log.info("3. Place Order");
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log.info("4. Exit");
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log.info("Enter your choice: ");
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int userInput = scanner.nextInt();
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scanner.nextLine();
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switch (userInput) {
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case 1 -> registerUser(scanner);
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case 2 -> addProduct(scanner);
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case 3 -> placeOrder(scanner);
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case 4 -> {
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log.info("Exiting the application. Goodbye!");
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return;
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}
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default -> log.info("Invalid choice! Please try again.");
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}
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}
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}
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private void registerUser(Scanner scanner) {
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log.info("Enter user details:");
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log.info("Name: ");
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String name = scanner.nextLine();
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log.info("Email: ");
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String email = scanner.nextLine();
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log.info("Password: ");
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String password = scanner.nextLine();
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User user = new User(null, name, email, password);
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userService.registerUser(user);
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log.info("User registered successfully!");
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}
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private void addProduct(Scanner scanner) {
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log.info("Enter product details:");
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log.info("Name: ");
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String name = scanner.nextLine();
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log.info("Description: ");
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String description = scanner.nextLine();
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log.info("Price: ");
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double price = scanner.nextDouble();
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log.info("Stock: ");
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int stock = scanner.nextInt();
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scanner.nextLine();
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Products product = new Products(null, name, description, price, stock);
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productService.addProduct(product);
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log.info("Product added successfully!");
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}
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private void placeOrder(Scanner scanner) {
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log.info("Enter order details:");
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log.info("User ID: ");
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long userId = scanner.nextLong();
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log.info("Product ID: ");
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long productId = scanner.nextLong();
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log.info("Quantity: ");
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int quantity = scanner.nextInt();
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scanner.nextLine();
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try {
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orderService.placeOrder(userId, productId, quantity);
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log.info("Order placed successfully!");
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} catch (Exception e) {
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log.info("Error placing order: {}", e.getMessage());
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}
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}
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}

‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/controller/OrderCon.java‎

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package com.iluwatar.monolithic.controller;
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import com.iluwatar.monolithic.exceptions.NonExistentUserException;
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import com.iluwatar.monolithic.exceptions.NonExistentProductException;
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import com.iluwatar.monolithic.exceptions.InsufficientStockException;
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import com.iluwatar.monolithic.model.User;
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import com.iluwatar.monolithic.model.Orders;
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import com.iluwatar.monolithic.model.Products;
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import com.iluwatar.monolithic.repository.OrderRepo;
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import com.iluwatar.monolithic.repository.ProductRepo;
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import com.iluwatar.monolithic.repository.UserRepo;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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@Service
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public class OrderCon {
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@Autowired
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private OrderRepo orderRepository;
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private final OrderRepo orderRepository;
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private final UserRepo userRepository;
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private final ProductRepo productRepository;
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@Autowired
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private UserRepo userRepository;
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public OrderCon(OrderRepo orderRepository, UserRepo userRepository, ProductRepo productRepository) {
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this.orderRepository = orderRepository;
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this.userRepository = userRepository;
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this.productRepository = productRepository;
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}
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@Autowired
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private ProductRepo productRepository;
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public Orders placeOrder(Long userId, Long productId, Integer quantity) {
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public Orders placeOrder(Long userId, Long productId, Integer quantity) {
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User user = userRepository.findById(userId).orElse(null);
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if (user == null) {
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throw new RuntimeException("User not found");
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throw new NonExistentUserException("User with ID " + userId + " not found");
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}
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Products product = productRepository.findById(productId).orElse(null);
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if (product == null) {
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throw new RuntimeException("Product not found");
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}
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throw new NonExistentProductException("Product with ID " + productId + " not found");
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}
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if (product.getStock() < quantity) {
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throw new RuntimeException("Not enough stock");
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throw new InsufficientStockException("Not enough stock for product " + productId);
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}
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product.setStock(product.getStock() - quantity);

‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/controller/ProductCon.java‎

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import com.iluwatar.monolithic.model.Products;
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import com.iluwatar.monolithic.repository.ProductRepo;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.util.List;
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@Service
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public class ProductCon {
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@Autowired
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private ProductRepo productRepository;
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private final ProductRepo productRepository;
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public Products addProduct(Products product) {
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public ProductCon(ProductRepo productRepository) {
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this.productRepository = productRepository;
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}
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public Products addProduct(Products product) {
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return productRepository.save(product);
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}
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‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/controller/UserCon.java‎

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import com.iluwatar.monolithic.model.User;
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import com.iluwatar.monolithic.repository.UserRepo;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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@Service
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public class UserCon {
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@Autowired
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private UserRepo userRepository;
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private final UserRepo userRepository;
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public User registerUser(User user) {
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public UserCon(UserRepo userRepository) {
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this.userRepository = userRepository;
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}
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public User registerUser(User user) {
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return userRepository.save(user);
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}
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}

‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/exceptions/InsufficientStockException.java‎

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package com.iluwatar.monolithic.exceptions;
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import java.io.Serial;
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public class InsufficientStockException extends RuntimeException{
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@Serial
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private static final long serialVersionUID = 1005208208127745099L;
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public InsufficientStockException(String message) {
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super(message);
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}
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}

‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/exceptions/NonExistentProductException.java‎

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package com.iluwatar.monolithic.exceptions;
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import java.io.Serial;
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public class NonExistentProductException extends RuntimeException{
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@Serial
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private static final long serialVersionUID = -593425162052345565L;
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public NonExistentProductException(String msg){
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super(msg);
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}
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}

‎Monolithic-Ecommerce/src/main/java/com/iluwatar/monolithic/exceptions/NonExistentUserException.java‎

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package com.iluwatar.monolithic.exceptions;
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import java.io.Serial;
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public class NonExistentUserException extends RuntimeException {
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@Serial
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private static final long serialVersionUID = -7660909426227843633L;
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public NonExistentUserException(String msg) {
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super(msg);
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}
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}

‎Monolithic-Ecommerce/src/main/resources/application.properties‎

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spring.datasource.driver-class-name=org.h2.Driver
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spring.datasource.password=password
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# Dynamic H2 Database configuration
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spring.datasource.url=jdbc:h2:mem:testdb
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spring.datasource.username=sa
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# H2 Console
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spring.h2.console.enabled=true
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# Hibernate Configuration
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spring.jpa.hibernate.ddl-auto=update
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spring.jpa.show-sql=true

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