Elasticsearch Java API boolQuery

我使用的是elasticsearch版本6.4.2

我成功地使用RESTAPI创建了一个GET查询，现在我想使用JavaAPI执行相同的查询

以下是查询：

GET _search
{
   "query":{
      "bool":{
         "must":{
            "match":{
               "tags":"kpi"
            }
         },
         "filter":{
            "range":{
               "@timestamp":{
                  "gt":"now-5m"
               }
            }
         }
      }
   }
}

我阅读了这个文档：但我仍然不清楚这是否是我正在寻找的，以及如何使用它。 考虑到查询可以返回许多必须由java应用程序处理的结果。

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另外，由于我必须每5分钟执行一次此查询，我如何优化它（如果可能）？

如果您的项目基于maven，您可以使用elasticsearch客户端依赖项：

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.6.2</version>
</dependency>

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最后，要执行查询，可以使用

client.search（query）

client

是一种

RestHighLevelClient

类型。

这正是有效的代码：

Date dateFrom = new Date(System.currentTimeMillis() - 300 * 1000);
Date dateTo = new Date(System.currentTimeMillis());

BoolQueryBuilder query = QueryBuilders.boolQuery()
    .must(QueryBuilders.rangeQuery("@timestamp").from(dateFrom).to(dateTo))
    .must(QueryBuilders.matchQuery("tags", "kpi"));

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(query);
SearchRequest searchRequest = new SearchRequest();
searchRequest.source(searchSourceBuilder);
System.out.println(query.toString());
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

logger.log(Level.INFO, "Status: {0}", new Object[] { searchResponse.status() });
logger.log(Level.INFO, "Took: {0}", new Object[] { searchResponse.getTook() });
logger.log(Level.INFO, "IsTerminatedEarly: {0}", new Object[] { searchResponse.isTerminatedEarly() });
logger.log(Level.INFO, "TimedOut: {0}", new Object[] { searchResponse.isTimedOut() });
logger.log(Level.INFO, "TotalShards: {0}", new Object[] { searchResponse.getTotalShards() });
logger.log(Level.INFO, "SuccessfulShards: {0}", new Object[] { searchResponse.getSuccessfulShards() });
logger.log(Level.INFO, "FailedShards: {0}", new Object[] { searchResponse.getFailedShards() });
logger.log(Level.INFO, "Total Hits: {0}", new Object[] { searchResponse.getHits().getTotalHits() });

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@斯巴拉，你能解释一下你还需要什么吗？@Val，我认为公认的答案不如另一个好！所以我想给他赏金！明白了，你已经有答案了，太好了；-）

Date dateFrom = new Date(System.currentTimeMillis() - 300 * 1000);
Date dateTo = new Date(System.currentTimeMillis());

BoolQueryBuilder query = QueryBuilders.boolQuery()
    .must(QueryBuilders.rangeQuery("@timestamp").from(dateFrom).to(dateTo))
    .must(QueryBuilders.matchQuery("tags", "kpi"));

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(query);
SearchRequest searchRequest = new SearchRequest();
searchRequest.source(searchSourceBuilder);
System.out.println(query.toString());
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

logger.log(Level.INFO, "Status: {0}", new Object[] { searchResponse.status() });
logger.log(Level.INFO, "Took: {0}", new Object[] { searchResponse.getTook() });
logger.log(Level.INFO, "IsTerminatedEarly: {0}", new Object[] { searchResponse.isTerminatedEarly() });
logger.log(Level.INFO, "TimedOut: {0}", new Object[] { searchResponse.isTimedOut() });
logger.log(Level.INFO, "TotalShards: {0}", new Object[] { searchResponse.getTotalShards() });
logger.log(Level.INFO, "SuccessfulShards: {0}", new Object[] { searchResponse.getSuccessfulShards() });
logger.log(Level.INFO, "FailedShards: {0}", new Object[] { searchResponse.getFailedShards() });
logger.log(Level.INFO, "Total Hits: {0}", new Object[] { searchResponse.getHits().getTotalHits() });