/*
* 统计每种兴趣下职工的平均年龄
* 聚合也允许分级汇总
*/
@Test
public void subAggregationTest() {
Client client = ClientTemplate.getClient();
SearchResponse response =
client
.prepareSearch("fccs")
.setTypes("employee")
.addAggregation(
AggregationBuilders.terms("by_interests")
.field("interests")
.subAggregation(AggregationBuilders.avg("avg_age").field("age")))
.get();
Terms terms = response.getAggregations().get("by_interests");
List<Bucket> buckets = terms.getBuckets();
for (Bucket bucket : buckets) {
Avg avg = bucket.getAggregations().get("avg_age");
System.out.println(
"key:"
+ bucket.getKey()
+ " doc_count:"
+ bucket.getDocCount()
+ " avg_age:"
+ avg.getValue());
}
client.close();
}
