考虑在配置问题中定义类型的 bean

Question

I'm trying to access @Mapper annotated interface in my @Service class

here is my Service class

@Service
public class PostServiceImpl implements PostService {

    private PostRepository postRepository;
    private PostMapper postMapper;

    public PostServiceImpl(PostRepository postRepository, PostMapper postMapper) {

        this.postRepository = postRepository;
        this.postMapper = postMapper;
    }

    @Override
    public PostDto createPost(PostDto postDto) {

        Post npo = postMapper.getPost(postDto);
        postRepository.save(npo);
        PostDto retrunStatus = postMapper.getPostDto(npo);

        return retrunStatus;

    }

    @Override
    public List<PostDto> getAllPosts() {
        // TODO Auto-generated method stub
        return null;
    }

}

and here is my Mapper class

@Mapper( imports = {Instant.class, DateTimeFormatter.class})
@Configuration
public interface PostMapper {
    
    Post getPost(PostDto postDto);
    
    PostDto getPostDto(Post post);

}

but am getting below error, while starting spring boot application

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 1 of constructor in com.rest.api.service.impl.PostServiceImpl required a bean of type 'com.rest.api.mapper.PostMapper' that could not be found.


Action:

Consider defining a bean of type 'com.rest.api.mapper.PostMapper' in your configuration.

It was running fine when I was not using mapper but using manually mapping PostDto to Post

Can anyone suggest what am doing wrong here?

Answer 1

PostMapper 's interface doesn't have any bean in which implements it. For example:

@Component
public class PostMapperImpl implements PostMapper{
  // override the PostMapper methods
}

BTW, the error that Spring throws tell you that.