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 single table inheritance scenario.

We'll cover the following...

“Find all records” operation

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

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@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class ProtocolServiceImplTest {

	@Autowired

	private ProtocolService service;

	@Test

	public void testFindAll() {

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

	}

}

Next, let’s learn how to code the corresponding “find all records” method in the business service.

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@Service

@Transactional

public class ProtocolServiceImpl implements ProtocolService {

	@Autowired

	private ProtocolDao protocolDao;

	@Autowired

	private ProtocolMapper protocolMapper;

	@Override

	public List<ProtocolDto> findAll() {

		List<Protocol> protocols = protocolDao.getAll();

		List<ProtocolDto> protocolDtos = new ArrayList<ProtocolDto>();

		for(Protocol protocol : protocols){

			protocolDtos.add(protocolMapper.mapEntityToDto(protocol));

		}

		return protocolDtos;

	}

}

Mappers

The mapper typically has two operations that are used to convert data access objects to ...