Elastic search has deprecated Facets and recommend to use Aggregations (http://www.elastic.co/guide/en/elasticsearch/reference/1.x/search-aggregations.html) .
Is Spring Data Elastic Search supports this currently ?
If Yes, is there any Samples available ?
Yes aggregation is supported.
Example :
@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()));
}
code is copied from ElasticsearchTemplateAggregationTests.java
To prevent a second call to elasticsearch you can extract the serachResult directly.
elasticsearchTemplate.query(query.build(), new ResultsExtractor<Object>() {
@Override
public Object extract(SearchResponse searchResponse) {
Aggregations aggregations = searchResponse.getAggregations();
List<AnyClass> ta = new DefaultResultMapper().mapResults(searchResponse, AnyClass.class, new PageRequest(page != null ? page : 0, 15)).getContent();
return ta;
}
});
