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 class table inheritance scenario.

We'll cover the following...

“Find all records” operation

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

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@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class EmployeeServiceImplTest {

	@Autowired

	private EmployeeService service;

	@Test

	public void testFindAll() {

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

	} 

}

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

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@Service

@Transactional

public class EmployeeServiceImpl implements EmployeeService {



	@Autowired

	private EmployeeDao employeeDao;

	

	@Autowired

	private EmployeeMapper employeeMapper;



	@Override

	public List<EmployeeDto> findAll() {

		List<Employee> employees = employeeDao.getAll();

		List<EmployeeDto> employeeDtos = new ArrayList<EmployeeDto>();

		for(Employee employee : employees){

			employeeDtos.add(employeeMapper.mapEntityToDto(employee));

		}

		return employeeDtos;

	} 

}

Mappers

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