{"id":339794,"date":"2022-10-16T21:00:09","date_gmt":"2022-10-16T21:00:09","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=339794"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=339794","title":{"rendered":"\u0415\u0449\u0435 \u043e\u0434\u0438\u043d \u0441\u043f\u043e\u0441\u043e\u0431 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f Java records \u043a\u0430\u043a DTO<\/span>"},"content":{"rendered":"
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\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d \u0441\u043f\u043e\u0441\u043e\u0431 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f Java records \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 DTO (data transfer objects).<\/p>\n

<\/a> <\/p>\n

\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c Spring Boot \/ Hibernate.<\/p>\n

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\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0434\u0430\u043b\u0435\u0435 \u043a\u043e\u0434 \u043d\u0435 \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d \u0434\u043b\u044f \u043f\u0440\u043e\u0434\u0430\u043a\u0448\u0435\u043d\u0430. \u042d\u0442\u043e, \u0441\u043a\u043e\u0440\u0435\u0435, \u0440\u0430\u0437\u043c\u044b\u0448\u043b\u0435\u043d\u0438\u044f \u043d\u0430 \u0442\u0435\u043c\u0443. \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u043a\u043e\u043c\u0443-\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e \u0438 \u043f\u043e\u043b\u0435\u0437\u043d\u043e.<\/p>\n

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\u0426\u0435\u043b\u044c \u2014 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u0441\u0435\u0440\u0432\u0438\u0441\u043d\u043e\u0433\u043e \u0441\u043b\u043e\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e DTO \u0438 \u043d\u0435 \u0442\u0430\u0441\u043a\u0430\u0442\u044c \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u0438 \u0441 persistence context’\u043e\u043c \u043f\u043e \u0431\u0438\u0437\u043d\u0435\u0441-\u043b\u043e\u0433\u0438\u043a\u0435. <\/p>\n

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\u041e\u0431\u044b\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0430\u0442\u0442\u0435\u0440\u043d\u0430 DTO \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0434\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043c\u043e\u0434\u0435\u043b\u0438 \u0432 DTO \u0438 \u043e\u0431\u0440\u0430\u0442\u043d\u043e.
\u041f\u043e \u0441\u0443\u0442\u0438 \u0438\u043c\u0435\u0435\u043c \u0442\u0440\u0438 \u0437\u0430\u0434\u0430\u0447\u0438 \u2014 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435\/\u0432\u044b\u0431\u043e\u0440\u043a\u0443 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0443\u0434\u043e\u0431\u043d\u044b\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043d\u0438\u043c\u0438.<\/p>\n

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\u0412 \u0434\u0435\u043c\u043e \u043f\u0440\u043e\u0435\u043a\u0442\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u044b \u0434\u0432\u0435 \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u0438 \u2014 Note<\/code> \u0438 Tag<\/code>, \u0441\u043e \u0441\u0432\u044f\u0437\u044f\u043c\u0438 ManyToMany.<\/p>\n

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\u0414\u0430\u043b\u0435\u0435 \u043e\u043f\u0438\u0441\u0430\u043d\u044b \u0441\u043f\u043e\u0441\u043e\u0431\u044b \u0432\u044b\u0431\u043e\u0440\u043a\u0438 \u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 Tag<\/code>.<\/p>\n

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\u0414\u043b\u044f \u0432\u044b\u0431\u043e\u0440\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 repository \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c JPQL Constructor Expressions:<\/p>\n

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    @Transactional(readOnly = true)     @Query(value = \"SELECT new dev.isdn.demo.records_dto.app.domain.tag.TagDto(t.id, t.name, t.color) FROM tags t WHERE t.id = :id\")     Optional<TagDto> findById(@Param(\"id\") long id);<\/code><\/pre>\n
  <\/p>\n
\u041f\u043e\u043b\u0443\u0447\u0430\u0435\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0441\u0440\u0430\u0437\u0443 \u0432 record, \u0437\u0430\u0432\u0435\u0440\u043d\u0443\u0442\u044b\u0439 \u0432 Optional<\/code>. \u0415\u0441\u043b\u0438 \u0432\u044b\u0431\u043e\u0440\u043a\u0430 \u043f\u0443\u0441\u0442\u0430\u044f \u2014 \u0442\u043e \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c \u043f\u0443\u0441\u0442\u043e\u0439 Optional<\/code>.<\/p>\n
  <\/p>\n
\u0421\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e, \u0432 \u0441\u0435\u0440\u0432\u0438\u0441\u043d\u043e\u043c \u0441\u043b\u043e\u0435 \u043f\u0440\u043e\u0441\u0442\u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442:<\/p>\n
  <\/p>\n
    public Optional<TagDto> getTagById(long tagId) {         return repository.findById(tagId);     }<\/code><\/pre>\n
  <\/p>\n
\u0414\u043b\u044f \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0432 \u0431\u0430\u0437\u0443 \u043d\u0443\u0436\u043d\u043e \u0431\u0443\u0434\u0435\u0442 \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0439:<\/p>\n
  <\/p>\n
Optional.ofNullable(tagDto) .flatMap(t -> repository.getTagById(t.id())) \/\/ \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u043c \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0437\u0430\u043f\u0438\u0441\u0438 \u0441 \u0442\u0430\u043a\u0438\u043c ID \u0432 \u0431\u0430\u0437\u0435 \u0438 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u0443\u0435\u043c DTO \u0432 entity .flatMap(t -> setTagNameAndColor(t, content.name(), content.color())) \/\/ \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u043c entity<\/code><\/pre>\n
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\u0412 \u0434\u0430\u043d\u043d\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0444\u0438\u0447\u0438 Optional<\/code> \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430 \u043d\u0430 \u043a\u0430\u0436\u0434\u043e\u043c \u0448\u0430\u0433\u0435.<\/p>\n
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\u041c\u0435\u0442\u043e\u0434 setTagNameAndColor()<\/code> \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u0442 \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u044c.<\/p>\n
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\u0412 \u0438\u0442\u043e\u0433\u0435 \u0441\u0434\u0435\u043b\u0430\u043b \u0432\u043e\u0442 \u0442\u0430\u043a\u043e\u0439 \u0441\u0435\u0440\u0432\u0438\u0441\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0432 \u0434\u0435\u043a\u043b\u0430\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u043c \u0441\u0442\u0438\u043b\u0435:<\/p>\n
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    @Transactional     public Optional<TagDto> updateTagContent(TagDto tag, TagContent content) {         return Functions.checkTagDto.apply(tag)                 .flatMap(t -> repository.getTagById(t.id()))                 .flatMap(t -> setTagNameAndColor(t, content.name(), content.color()))                 .map(repository::saveAndFlush)                 .flatMap(t -> repository.findById(t.getId()));     }<\/code><\/pre>\n
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\u0422\u0430\u043a\u043e\u0439 \u043f\u043e\u0434\u0445\u043e\u0434 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u0438\u0437\u0431\u044b\u0442\u043e\u0447\u043d\u044b\u043c, \u0441\u0434\u0435\u043b\u0430\u043d\u043e \u0438\u0441\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0432 \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0446\u0435\u043b\u044f\u0445. <\/p>\n
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\u0424\u0443\u043d\u043a\u0446\u0438\u044f checkTagDto<\/code> \u0434\u0435\u043b\u0430\u0435\u0442 \u043f\u0440\u043e\u0441\u0442\u0443\u044e \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 Optional.ofNullable(tag).filter(t -> t.id() > 0)<\/code>. <\/p>\n
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\u0411\u043e\u043b\u0435\u0435 \u0441\u043b\u043e\u0436\u043d\u044b\u0435 \u0432\u044b\u0431\u043e\u0440\u043a\u0438 \u0438\u0437 \u0431\u0430\u0437\u044b \u0432 repository \u043c\u043e\u0436\u043d\u043e \u0434\u0435\u043b\u0430\u0442\u044c \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u043e.
  \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u0435 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445:<\/p>\n
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    @QueryHints(value = {             @QueryHint(name = HINT_FETCH_SIZE, value = \"100\"),             @QueryHint(name = READ_ONLY, value = \"true\")     })     @Transactional(readOnly = true)     @Query(value = \"SELECT new dev.isdn.demo.records_dto.app.domain.tag.TagDto(t.id, t.name, t.color) FROM tags t INNER JOIN t.notes n WHERE n.id = :noteId\")     Stream<TagDto> findAllByNoteId(@Param(\"noteId\") long noteId);<\/code><\/pre>\n
  <\/p>\n
    @QueryHints(value = {             @QueryHint(name = HINT_FETCH_SIZE, value = \"100\"),             @QueryHint(name = READ_ONLY, value = \"true\")     })     @Transactional(readOnly = true)     @Query(value = \"SELECT new dev.isdn.demo.records_dto.app.domain.note.NoteDto(n.id, n.created, n.modified, n.content) FROM notes n INNER JOIN n.tags t WHERE t.id = :tagId\")     Stream<NoteDto> findAllByTagId(@Param(\"tagId\") long tagId);<\/code><\/pre>\n
  <\/p>\n
\u0422\u0435\u043f\u0435\u0440\u044c \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u0441 \u044d\u0442\u0438\u043c \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c.<\/p>\n
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\u041f\u0440\u043e\u0441\u0442\u043e\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 REST \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430:<\/p>\n
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    @PutMapping(PREFIX + VERSION + \"\/tags\/{id}\")     TagDto updateTagContent(@PathVariable long id, @RequestBody TagContent content) {         TagDto tag = tagService.getTagById(id).orElseThrow(() -> new NoSuchItemException(\"tag \" + id));         return tagService.updateTagContent(tag, content).orElseThrow(() -> new NotUpdatedException(\"tag \" + id));     }      @GetMapping(PREFIX + VERSION + \"\/tags\/{id}\/notes\")     List<NoteDto> getTagNotes(@PathVariable long id) {         TagDto tag = tagService.getTagById(id).orElseThrow(() -> new NoSuchItemException(\"tag \" + id));         return noteService.getTagNotes(tag);     }<\/code><\/pre>\n
  <\/p>\n
\u041f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432\u043e\u0442 \u0437\u0434\u0435\u0441\u044c<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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 \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438  https:\/\/habr.com\/ru\/post\/693648\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043d \u0441\u043f\u043e\u0441\u043e\u0431 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f Java records \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 DTO (data transfer objects).<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-339794","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/339794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=339794"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/339794\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=339794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=339794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=339794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}