#3230 - Clean Architecture.

Author: Suchismita-Deb

clean-architecture/pom.xml

@@ -50,7 +50,7 @@
                         <configuration>
                             <archive>
                                 <manifest>
-                                    <mainClass>com.iluwatar.cleanArchitecture.App</mainClass>
+                                    <mainClass>com.iluwatar.cleanarchitecture.App</mainClass>
                                 </manifest>
                             </archive>
                         </configuration>

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/App.java

@@ -0,0 +1,41 @@
+package com.iluwatar.cleanarchitecture;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * Clean Architecture ensures separation of concerns by organizing code into layers, making it scalable and maintainable.
+ *
+ * In the example there are  Entities (Core Models) – Product, Cart, Order handle business logic.
+ * Use Cases (Application Logic) – ShoppingCartService manages operations like adding items and checkout.
+ * Interfaces & Adapters – Repositories (CartRepository, OrderRepository) abstract data handling, while controllers (CartController, OrderController) manage interactions.
+ */
+@Slf4j
+public class App {
+
+  /**
+   * Program entry point.
+   *
+   * @param args command line args
+   */
+  public static void main(String[] args) {
+
+    ProductRepository productRepository = new InMemoryProductRepository();
+    CartRepository cartRepository = new InMemoryCartRepository();
+    OrderRepository orderRepository = new InMemoryOrderRepository();
+
+    ShoppingCartService shoppingCartUseCase =
+        new ShoppingCartService(productRepository, cartRepository, orderRepository);
+
+    CartController cartController = new CartController(shoppingCartUseCase);
+    OrderController orderController = new OrderController(shoppingCartUseCase);
+
+    String userId = "user123";
+    cartController.addItemToCart(userId, "1", 1);
+    cartController.addItemToCart(userId, "2", 2);
+
+    LOGGER.info("Total: ${}" + cartController.calculateTotal(userId));
+
+    Order order = orderController.checkout(userId);
+    LOGGER.info("Order placed! Order ID: {}, Total: ${}", order.getOrderId(), order.getTotalPrice());
+  }
+}

clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/App.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 public class Cart {
   private Product product;

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/Cart.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/Cart.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 public class CartController {
   private final ShoppingCartService shoppingCartUseCase;
@@ -11,6 +11,7 @@ public void addItemToCart(String userId, String productId, int quantity) {
     shoppingCartUseCase.addItemToCart(userId, productId, quantity);
   }
 
+
   public void removeItemFromCart(String userId, String productId) {
     shoppingCartUseCase.removeItemFromCart(userId, productId);
   }

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/CartController.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/CartController.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 import java.util.List;
 

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/CartRepository.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/CartRepository.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 import java.util.ArrayList;
 import java.util.HashMap;

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/InMemoryCartRepository.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/InMemoryCartRepository.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 import java.util.ArrayList;
 import java.util.List;

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/InMemoryOrderRepository.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/InMemoryOrderRepository.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 import java.util.HashMap;
 import java.util.Map;

clean-architecture/src/main/java/com.iluwatar.cleanArchitecture/InMemoryProductRepository.java renamed to clean-architecture/src/main/java/com/iluwatar/cleanarchitecture/InMemoryProductRepository.java

@@ -1,4 +1,4 @@
-package com.iluwatar.cleanArchitecture;
+package com.iluwatar.cleanarchitecture;
 
 import java.util.List;