Software Architecture in Java: Design & Development/

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Develop the Business Service Tier

Develop the Business Service Tier

Let's see how the business service can be developed for a concrete table inheritance scenario.

We'll cover the following...

Find all records operation

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

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@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.

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@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 ...