如何在 Spring-data-elasticsearch 中禁用页面查询

Question

我使用spring-data-elasticsearch框架从elasticsearch服务器获取查询结果，java代码如下：

public void testQuery() {
    SearchQuery searchQuery = new NativeSearchQueryBuilder()
        .withFields("createDate","updateDate").withQuery(matchAllQuery()).withPageable(new PageRequest(0,Integer.MAX_VALUE)).build();
    List<Entity> list = template.queryForList(searchQuery, Entity.class);
    for (Entity e : list) {
        System.out.println(e.getCreateDate());
        System.out.println(e.getUpdateDate());
    }
}

我在服务器中获取原始查询日志，如下所示：

{"from":0,"size":10,"query":{"match_all":{}},"fields":["createDate","updateDate"]}

根据查询日志，spring-data-elasticsearch 会增加查询的大小限制。"from":0, "size":10, 我怎样才能避免它添加大小限制？

Answer 1

您不想这样做，您可以在返回 Iterable 的存储库上使用 findAll 功能。我认为获取所有项目的最佳方法是使用扫描/滚动功能。也许下面的代码块可以让你朝着正确的方向前进：

    SearchQuery searchQuery = new NativeSearchQueryBuilder()
            .withQuery(QueryBuilders.matchAllQuery())
            .withIndices("customer")
            .withTypes("customermodel")
            .withSearchType(SearchType.SCAN)
            .withPageable(new PageRequest(0, NUM_ITEMS_PER_SCROLL))
            .build();
    String scrollId = elasticsearchTemplate.scan(searchQuery, SCROLL_TIME_IN_MILLIS, false);
    boolean hasRecords = true;
    while (hasRecords) {
        Page<CustomerModel> page = elasticsearchTemplate.scroll(scrollId, SCROLL_TIME_IN_MILLIS, CustomerModel.class);
        if (page != null) {
            // DO something with the records
            hasRecords = (page.getContent().size() == NUM_ITEMS_PER_SCROLL);
        } else {
            hasRecords = false;
        }
    }