Software Architecture in Java: Design & Development/

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Develop the Data Access Tier

Develop the Data Access Tier

The data access tier is the second step in the process of developing a service.

We'll cover the following...

“Find all records” operation

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

Java
@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class EstateDaoImplTest {

	@Autowired

	private EstateDao dao ;

	@Test

	public void testGetAll() {

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

	}

}

We will then see how to write the corresponding data access operation for the above test.

Java
@Repository

@Transactional

public class EstateDaoImpl  implements EstateDao {

	@Autowired

	private SessionFactory sessionFactory ;

	@SuppressWarnings("unchecked")

	@Override

	public List<Estate> getAll() {

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

	}

}

Insert operation

Let’s move ...