Search⌘ K
AI Features
Home
Courses
Software Architecture in Java: Design & Development

Develop the Data Access Tier

Explore how to develop the data access tier in Java applications by writing test-driven operations such as finding, inserting, updating, and deleting records using Hibernate's Session methods. Understand practical implementation with single table inheritance and REST integration.

We'll cover the following...

We will start with the test case for the “find all records” operation.

“Find all records” operation

Java
@RunWith( SpringJUnit4ClassRunner.class )

@ContextConfiguration( locations = { "classpath:context.xml" } )

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class ProtocolDaoImplTest {

	@Autowired

	private ProtocolDao dao ;



	@Test

	public void testGetAll() {

		Assert.assertEquals(0L, dao.getAll().size());

	}

}

We will learn how to write the corresponding data access operation of the above test.

Java
@Repository

@Transactional

public class ProtocolDaoImpl  implements ProtocolDao {

	@Autowired

	private SessionFactory sessionFactory ;



	@SuppressWarnings("unchecked")

	@Override

	public List<Protocol> getAll() {

		return sessionFactory.getCurrentSession().createQuery("select protocol from Protocol protocol order by protocol.id desc").list();

	}

}

Insert operation

Let’s move on ...