composite-build-usage-example

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package by.andd3dfx.templateapp.services.impl;
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import by.andd3dfx.templateapp.dto.ArticleDto;
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import by.andd3dfx.templateapp.dto.ArticleUpdateDto;
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import by.andd3dfx.templateapp.error.exception.ArticleNotFoundException;
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import by.andd3dfx.templateapp.mappers.ArticleMapper;
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import by.andd3dfx.templateapp.persistence.dao.ArticleRepository;
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import by.andd3dfx.templateapp.persistence.entities.Article;
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import by.andd3dfx.templateapp.services.IArticleService;
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import java.util.List;
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import lombok.RequiredArgsConstructor;
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import org.springframework.dao.EmptyResultDataAccessException;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.domain.Slice;
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import org.springframework.data.domain.Sort;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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@Service
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@RequiredArgsConstructor
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public class ArticleService implements IArticleService {
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    private final ArticleRepository articleRepository;
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    private final ArticleMapper articleMapper;
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    @Transactional
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    @Override
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    public ArticleDto create(ArticleDto articleDto) {
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        Article entity = articleMapper.toArticle(articleDto);
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        Article savedEntity = articleRepository.save(entity);
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        return articleMapper.toArticleDto(savedEntity);
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    }
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    @Transactional(readOnly = true)
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    @Override
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    public ArticleDto get(Long id) {
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        return articleRepository.findById(id)
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            .map(articleMapper::toArticleDto)
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            .orElseThrow(() -> new ArticleNotFoundException(id));
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    }
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    @Transactional
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    @Override
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    public void update(Long id, ArticleUpdateDto articleUpdateDto) {
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        articleRepository.findById(id)
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            .map(article -> {
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                articleMapper.toArticle(articleUpdateDto, article);
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                Article savedArticle = articleRepository.save(article);
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                return articleMapper.toArticleDto(savedArticle);
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            }).orElseThrow(() -> new ArticleNotFoundException(id));
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    }
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    @Transactional
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    @Override
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    public void delete(Long id) {
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        try {
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            articleRepository.deleteById(id);
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        } catch (EmptyResultDataAccessException ex) {
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            throw new ArticleNotFoundException(id);
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        }
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    }
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    @Transactional(readOnly = true)
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    @Override
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    public Slice<ArticleDto> getAll(Pageable pageable) {
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        Slice<Article> pagedResult = articleRepository.findAll(pageable);
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        return pagedResult.map(articleMapper::toArticleDto);
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    }
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}
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