elasticsearch Java API中的多个平均聚合

Question

是否有与此子聚合等效的 Java 代码。我需要 Java 代码来构建子聚合对象。{  "query": {    "SOME BOOL QUERIES HERE"  }, "aggs" : {        "trs_timestamp" : {            "date_histogram" : {                "field" : "trs_timestamp",                "interval" : "day"            },        "aggs" : {                "AvgTT" : { "avg" : { "field" : "action_time" }},                "AvgST" : { "avg" : { "field" : "st" }},                "AvgCALC" : { "avg" : { "field" : "ncalc" }},                "AvgRC" : { "avg" : { "field" : "rc" }},                "AvgFR" : { "avg" : { "field" : "st" }}            }        }    } }

Answer 1

您可以使用 Elasticsearch Java API 并AggregationBuilders为此，例如：

SearchResponse response = client.prepareSearch()
        .addAggregation(AggregationBuilders.avg("AvgTT").field("action_time"))
        .addAggregation(AggregationBuilders.avg("AvgST").field("st"))
        .addAggregation(AggregationBuilders.avg("AvgCALC").field("ncalc"))
        .addAggregation(AggregationBuilders.avg("AvgRC").field("rc"))
        .addAggregation(AggregationBuilders.avg("AvgFR").field("st"))
        .execute()
        .actionGet();

Answer 2

举例：

SearchResponse sr = node.client().prepareSearch()
        .setQuery( /* your query */ )
        .addAggregation( /* add an aggregation */ )
        .execute().actionGet();

您可以看到，这addAggregation并不set意味着您可以向查询添加多个聚合。 https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-aggs.html