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 scenario

We'll cover the following...

We will review the business service tier.

“Find all records” operation

First, we will review how to perform the “find all records” operation.

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@RunWith( SpringJUnit4ClassRunner.class )

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

@TransactionConfiguration( defaultRollback = true )

@Transactional

public class MemberMemberServiceImplTest {



	@Autowired

	private MemberService memberService;

	

	@Autowired

	private MemberMemberService memberMemberService;

	

	@Test

	public void testFindAll() {

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

	}

}

Let’s see how to program the corresponding method in the business service.

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@Service

@Transactional

public class MemberMemberServiceImpl implements MemberMemberService {



	@Autowired

	private MemberDao memberDao;

	

	@Autowired

	private MemberMapper memberMapper;

	

	@Autowired

	private MemberMemberDao memberMemberDao;	

	

	@Override

	public List<MemberMemberDto> findAll() {

		List<MemberMemberDto> memberMemberDtos = new ArrayList<MemberMemberDto>();

		List<Member> memberList = memberMemberDao.getAll();

		for(Member member : memberList) {			

			MemberDto memberDto = memberMapper.mapEntityToDto(member);			

			Set<Member> members1 = member.getMembers1();

			for(Member member2 : members1) {

				MemberMemberDto memberMemberDto = new MemberMemberDto();

				memberMemberDto.setMemberId1(memberDto);

				MemberDto memberDto2 = memberMapper.mapEntityToDto(member2);

				memberMemberDto.setMemberId2(memberDto2);

				memberMemberDtos.add(memberMemberDto);

			}			

		}

		return memberMemberDtos;

	}

}

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