如何在 SearchResponse 中使用 elasticSearch java api 访问聚合结果？
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How to access Aggregations result with elasticSearch java api in SearchResponse?
提问by ThomasC
Is there a way to retrieve the aggregations' buckets in a search response, with the java API ?
有没有办法使用 java API 在搜索响应中检索聚合的存储桶？
{
"took" : 185,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 200,
"max_score" : 1.0,
"hits" : [...]
},
"aggregations" : {
"agg1" : {
"buckets" : [...]
},
"agg2" : {
"buckets" : [...]
}
}
}
Currently, it's possible to get the aggregations but I can't figure out how to get the buckets.
目前，可以获取聚合，但我不知道如何获取存储桶。
Current 1.0 version of ElasticSearch (v1.0.0.Beta2) is still a beta version, and maybe this feature still has to be added, but didn't find info on that point too.
目前 ElasticSearch 的 1.0 版本（v1.0.0.Beta2）仍然是 beta 版本，也许这个功能还需要添加，但也没有找到这方面的信息。
采纳答案by mconlin
Looking at the ES source on GithubI see the following in their tests:
查看Github上的ES 源代码，我在他们的测试中看到以下内容：
SearchResponse response = client().prepareSearch("idx").setTypes("type")
.setQuery(matchAllQuery())
.addAggregation(terms("keys").field("key").size(3).order(Terms.Order.count(false)))
.execute().actionGet();
Terms terms = response.getAggregations().get("keys");
Collection<Terms.Bucket> buckets = terms.getBuckets();
assertThat(buckets.size(), equalTo(3));
回答by Charith De Silva
If anyone wonder about accessing actual documents count out of these buckets following code might help.
如果有人想知道从这些存储桶中访问实际文档计数可能会有所帮助。
Terms terms = response.getAggregations().get("agg1");
Collection<Terms.Bucket> buckets = terms.getBuckets();
for (Bucket bucket : buckets) {
System.out.println(bucket.getKeyAsText() +" ("+bucket.getDocCount()+")");
}
