Designing Hexagonal Architecture With Java Pdf Today

public interface ProductRepository Optional<Product> findById(String id); void save(Product product);

Driving Adapter (REST) → Incoming Port (Interface) → Application Service → Outgoing Port (Interface) ← Driven Adapter (JPA) designing hexagonal architecture with java pdf

@SpringBootTest @Testcontainers class JpaProductRepositoryTest @Container static PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:15"); @Test void shouldSaveAndRetrieve() // ... real database test public interface ProductRepository Optional&lt

@RequiredArgsConstructor public class CreateProductService implements CreateProductUseCase private final ProductRepository productRepository; // depends on outgoing port void save(Product product)

// adapters/web/ProductController.java package com.example.adapters.web; import com.example.application.port.in.CreateProductUseCase; import com.example.application.port.in.CreateProductUseCase.CreateProductCommand; import com.example.domain.model.Product; import lombok.RequiredArgsConstructor; import org.springframework.web.bind.annotation.*; @RestController @RequiredArgsConstructor public class ProductController private final CreateProductUseCase createProductUseCase; // depends on incoming port

// application/port/in/CreateProductUseCase.java (Incoming Port) package com.example.application.port.in; import com.example.domain.model.Product; public interface CreateProductUseCase { Product execute(CreateProductCommand command);