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Software Architecture in Java: Design & Development

Develop the Business Service Tier

Explore how to implement the business service tier focusing on Concrete Table Inheritance within a Java Spring and Hibernate application. Learn to perform key CRUD operations like find all, create, remove, edit, and find by ID, managing data flow between access objects and entities to maintain efficient server-side data handling.

We'll cover the following...

Find all records operation

We will proceed with the “find all records” operation.

Java
@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class EstateServiceImplTest {

	@Autowired

	private EstateService service;

	

	@Test

	public void testFindAll() {

		Assert.assertEquals(0L, service.findAll().size());

	}

}

Let’s look at how to code the corresponding “find all records” operation in the business service.

Java
@Service

@Transactional

public class EstateServiceImpl implements EstateService {



	@Autowired

	private EstateDao estateDao;

	

	@Autowired

	private EstateMapper estateMapper;

	

	@Override

	public List<EstateDto> findAll() {

		List<Estate> estates = estateDao.getAll();

		List<EstateDto> estateDtos = new ArrayList<EstateDto>();

		for(Estate estate : estates){

			estateDtos.add(estateMapper.mapEntityToDto(estate));

		}

		return estateDtos;

	}

}

Mappers

The mapper has two vital operations which are used to convert data access objects to ...