spring-data-elasticsearch - Spring Data Elastic Search の集計サポート

Question

エラスティック検索はファセットを廃止し、集約を使用することを推奨しています ( http://www.elastic.co/guide/en/elasticsearch/reference/1.x/search-aggregations.html ) 。

Spring Data Elastic Search は現在これをサポートしていますか?

はいの場合、利用可能なサンプルはありますか?

Answer 1

はい、集約がサポートされています。

例 ：

    @Test
    public void shouldReturnAggregatedResponseForGivenSearchQuery() {
    // given
    IndexQuery article1 = new ArticleEntityBuilder("1").title("article four").subject("computing").addAuthor(RIZWAN_IDREES).addAuthor(ARTUR_KONCZAK).addAuthor(MOHSIN_HUSEN).addAuthor(JONATHAN_YAN).score(10).buildIndex();
    IndexQuery article2 = new ArticleEntityBuilder("2").title("article three").subject("computing").addAuthor(RIZWAN_IDREES).addAuthor(ARTUR_KONCZAK).addAuthor(MOHSIN_HUSEN).addPublishedYear(YEAR_2000).score(20).buildIndex();
    IndexQuery article3 = new ArticleEntityBuilder("3").title("article two").subject("computing").addAuthor(RIZWAN_IDREES).addAuthor(ARTUR_KONCZAK).addPublishedYear(YEAR_2001).addPublishedYear(YEAR_2000).score(30).buildIndex();
    IndexQuery article4 = new ArticleEntityBuilder("4").title("article one").subject("accounting").addAuthor(RIZWAN_IDREES).addPublishedYear(YEAR_2002).addPublishedYear(YEAR_2001).addPublishedYear(YEAR_2000).score(40).buildIndex();

    elasticsearchTemplate.index(article1);
    elasticsearchTemplate.index(article2);
    elasticsearchTemplate.index(article3);
    elasticsearchTemplate.index(article4);
    elasticsearchTemplate.refresh(ArticleEntity.class, true);

    SearchQuery searchQuery = new NativeSearchQueryBuilder()
            .withQuery(matchAllQuery())
            .withSearchType(COUNT)
            .withIndices("articles").withTypes("article")
            .addAggregation(terms("subjects").field("subject"))
            .build();
    // when
    Aggregations aggregations = elasticsearchTemplate.query(searchQuery, new ResultsExtractor<Aggregations>() {
        @Override
        public Aggregations extract(SearchResponse response) {
            return response.getAggregations();
        }
    });
    // then
    assertThat(aggregations, is(notNullValue()));
    assertThat(aggregations.asMap().get("subjects"), is(notNullValue()));
}

コードはElasticsearchTemplateAggregationTests.javaからコピーされます