Shulou(Shulou.com)06/02 Report--

This article mainly explains "how to use ElasticsearchTemplate to execute scrolling query". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use ElasticsearchTemplate to execute scrolling query".

Basic paging queries will report errors when querying large amounts of data using Elasticsearch, in which case you can use scroll (scrolling) queries

Go directly to the code:

/ / 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!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.