Designing Hexagonal Architecture With Java Pdf Free 2021 Download __top__ Guide
package com.example.ordermanagement.adapter.inbound.rest; import com.example.ordermanagement.domain.model.Order; import com.example.ordermanagement.ports.inbound.CreateOrderUseCase; import org.springframework.http.ResponseEntity; import org.springframework.web.bind.annotation.*; import java.math.BigDecimal; @RestController @RequestMapping("/orders") public class OrderController private final CreateOrderUseCase createOrderUseCase; public OrderController(CreateOrderUseCase createOrderUseCase) this.createOrderUseCase = createOrderUseCase; @PostMapping public ResponseEntity createOrder(@RequestParam BigDecimal price) Order order = createOrderUseCase.createOrder(price); return ResponseEntity.ok(order); Use code with caution.
In traditional layered architectures, business logic is often sandwiched between the user interface and the database, making it difficult to test or modify without breaking other components. Hexagonal Architecture flips this by placing the Domain Layer (the "inside") at the center of the application. package com
Contains business logic, entities, and domain services. It knows nothing about the outside world. Contains business logic, entities, and domain services
package com.example.order.adapters.outbound; import com.example.order.domain.Order; import com.example.order.ports.outbound.OrderRepositoryPort; import org.springframework.stereotype.Repository; @Repository public class OrderRepositoryAdapter implements OrderRepositoryPort private final SpringDataOrderRepository repository; public OrderRepositoryAdapter(SpringDataOrderRepository repository) this.repository = repository; @Override public void save(Order order) OrderEntity entity = new OrderEntity(order.getId(), order.getProduct(), order.getPrice(), order.getStatus()); repository.save(entity); Use code with caution. Contains business logic
Concrete implementations that connect external systems (like databases, REST APIs, or message brokers) to the ports. The Dependency Inversion Principle