adapters → application → domain . Domain has no dependencies on any other module.
@Component @RequiredArgsConstructor public class JpaProductRepository implements ProductRepository private final SpringDataJpaProductRepository jpaRepository; designing hexagonal architecture with java pdf
In Hexagonal (following Dependency Inversion): adapters → application → domain
// Database adapter public class UserRepositoryDatabaseAdapter implements UserRepository @Override public User getUser(Long id) // Database logic to get user return new User(id, "John Doe"); public record Product(String id
public record Product(String id, String name, Money price) public Product if (price.amount() <= 0) throw new IllegalArgumentException("Price must be positive");
// bootstrap/Application.java @SpringBootApplication public class Application public static void main(String[] args) SpringApplication.run(Application.class, args);
Let's outline a typical flow: