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 many-to-many self-referencing relationship with a join-attribute scenario.

We'll cover the following...

In this lesson, we will move to the business service tier.

“Find all records” operation

First, we will review the test to find all records.

@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class WorkerWorkerServiceImplTest {



	@Autowired

	private WorkerService workerService;

	

	@Autowired

	private WorkerWorkerService workerWorkerService;

	

	@Test

	public void testFindAll() {

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

	}

}

Let’s examine how to program the related method in the business tier.

@Service

@Transactional

public class WorkerWorkerServiceImpl implements WorkerWorkerService {



	@Autowired

	private WorkerDao workerDao;

	

	@Autowired

	private WorkerMapper workerMapper;

	

	@Autowired

	private WorkerWorkerDao workerWorkerDao;

	

	@Override

	public List<WorkerWorkerDto> findAll() {

		List<WorkerWorkerDto> workerWorkerDtos = new ArrayList<WorkerWorkerDto>();

		List<WorkerWorker> workerList = workerWorkerDao.getAll();

		for(WorkerWorker workerWorker : workerList) {	

			WorkerWorkerDto workerWorkerDto = new WorkerWorkerDto();	

			workerWorkerDto.setWorkerId1(workerMapper.mapEntityToDto(workerWorker.getWorker1()));

			workerWorkerDto.setWorkerId2(workerMapper.mapEntityToDto(workerWorker.getWorker2()));

			workerWorkerDto.setRelationshipType(workerWorker.getRelationshipType());

			workerWorkerDtos.add(workerWorkerDto);

		}

		return workerWorkerDtos;

	}

}

Create operation

Let’s move on to the ...