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...

Let’s move to the data access tier, beginning with the test case for the getAll records operation.

Find all records operation

Java
@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class CustomerDaoImplTest {

	@Autowired

	private CustomerDao dao ;

	@Test

	public void testGetAll() {

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

	}

}

We will see how to write the imitating data access operation for the test. The Hibernate 4 Session.createQuery operation is used with SQL to retrieve all the records from the Customer entity.

Java
@Repository

@Transactional

public class CustomerDaoImpl implements CustomerDao{

	@Autowired

	private SessionFactory sessionFactory ;

	@Override

	public List<Customer> getAll() {

		return sessionFactory.getCurrentSession().

				createQuery("select customer from Customer customer order by customer.id desc").list();

	}

}

Insert operation

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