How to use ElasticsearchTemplate to execute scrolling queries
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Basic paging queries will report errors when querying large amounts of data using Elasticsearch, in which case you can use scroll (scrolling) queries
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/ / create query condition object BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery (); / / stitch query condition queryBuilder.must (QueryBuilders.termQuery ("status", 1)) Suppose the query object SearchQuery searchQuery = new NativeSearchQueryBuilder (). WithIndices ("test_index") / / Index name. WithTypes ("test") / / Type name. WithQuery (queryBuilder) / / query condition object. WithPageable (PageRequest.of (0, 1000)) / / starting from page 0 1000 results per page. Build () / / scroll query ScrolledPage scroll = (ScrolledPage) elasticsearchTemplate.startScroll (3000, searchQuery, TestEntity.class); / / determine whether there is content while (scroll.hasContent ()) {List content = scroll.getContent (); / / Business logic omits / / take the next page. ScrollId may change on the es server and need to be up-to-date. Initiating a continueScroll request will refresh the snapshot retention time scroll = (ScrolledPage) elasticsearchTemplate.continueScroll (scroll.getScrollId (), 3000, EstateInfoEntity.class);} / / finally release the query elasticsearchTemplate.clearScroll (scroll.getScrollId ()) Thank you for your reading, the above is the content of "how to use ElasticsearchTemplate to execute scrolling query". After the study of this article, I believe you have a deeper understanding of how to use ElasticsearchTemplate to execute scrolling query, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!
