kevin

<pre class="language-java"><code>//서비스를 주입받는 서비스
@Service
@Transactional(readOnly = true)
@RequiredArgsConstructor
public class BookComplexService {

    private final BookInfoService bookInfoService;
    private final BookService bookService;
    private final ClubBookUserService cbuService;
    private final UserService userService;
    private final PostService postService;

    @Transactional
    public Long createBookAndRelated(CreateBookDto createBookDto, Long userId) {
        BookInfo bookInfo = BookInfo.builder()
                .name(createBookDto.getName())
                .isbn(createBookDto.getIsbn())
                .build();
        bookInfo = bookInfoService.createOrFindBookInfo(bookInfo);

        Book newBook = Book.builder()
                .category(createBookDto.getCategory())
                .bookInfo(bookInfo)
                .build();
        Long bookId = bookService.createBookWithValidation(newBook, bookInfo.getIsbn(), userId);

        User user = userService.findById(userId);

        ClubBookUser cbu = ClubBookUser.builder()
                .book(newBook)
                .user(user)
                .build();
        cbuService.createClubBookUser(cbu);

        return bookId;
    }</code></pre>

service와 controller의 역할에 대한 질문이 있습니다.

<pre class="language-java"><code>//수정한코드
 @PostMapping
    public ResponseEntity<CreateBookDto> createBook(@SessionAttribute(name = SessionConst.LOGIN_USER, required = false) User loginUser,
                                                    @RequestBody CreateBookDto createBookDto, UriComponentsBuilder b) {

        Long bookId = bookComplexService.createBookAndRelated(createBookDto, loginUser.getId());

        UriComponents uriComponents = b.path("/books/{bookId}").buildAndExpand(bookId);
        return ResponseEntity.created(uriComponents.toUri()).body(createBookDto);
    }</code></pre>

<pre class="language-java"><code> 
//기존 코드
@PostMapping
    public ResponseEntity<CreateBookDto> createBook(@SessionAttribute(name = SessionConst.LOGIN_USER, required = false) User loginUser,
                                                    @RequestBody CreateBookDto createBookDto, UriComponentsBuilder b){
        BookInfo bookInfo = BookInfo.builder()
                .name(createBookDto.getName())
                .isbn(createBookDto.getIsbn())
                .build();

        try {
            bookInfoService.createBookInfo(bookInfo);
        }catch (IllegalStateException e){
            log.info("bookInfoService = {}",e.toString());
            BookInfo byIsbn = bookInfoService.findByIsbn(bookInfo.getIsbn());
            bookInfo = byIsbn;
        }

        Book newBook = Book.builder()
                .category(createBookDto.getCategory())
                .bookInfo(bookInfo)
                .build();

        Long bookId = bookService.createBook(newBook);

        ClubBookUser cbu = ClubBookUser.builder()
                .book(newBook)
                .user(loginUser)
                .build();
        cbuService.createClubBookUser(cbu);

        UriComponents uriComponents =
                b.path("/books/{bookId}").buildAndExpand(bookId);

//        return ResponseEntity.noContent().build().created(uriComponents.toUri()).build();

        return ResponseEntity.created(uriComponents.toUri()).body(createBookDto);
    }</code></pre>

kevin

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