Implement the outbound ports to handle technical tasks like persistence in MySQL or sending emails. Why Choose Hexagonal Architecture for Java?
@SpringBootTest @Testcontainers class JpaProductRepositoryTest @Container static PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:15"); @Test void shouldSaveAndRetrieve() // ... real database test
You can download a PDF version of this content from here . designing hexagonal architecture with java pdf
Elias realized the power of this instantly. If OrderService depended on an interface, he could swap the database without touching the service.
public User(Long id, String name) this.id = id; this.name = name; Implement the outbound ports to handle technical tasks
The PDF broke the architecture down into three distinct zones:
The sun was beginning to crest over the city skyline when Elias closed the PDF. The blinking red light on his dashboard seemed less urgent now. He knew the "quick fix" he was about to apply would only delay the inevitable. real database test You can download a PDF
The author showed a diagram where the "Driving Adapter" switched from a REST Controller to a CLI Command Line tool. The domain didn't change. Then, the "Driven Adapter" switched from a SQL Database to a NoSQL store. The domain still didn't change.
Interfaces defined inside the domain that act as entry and exit points.