Elasticsearch Java High Level Client 7.3.1 :Aggregation for Index wise hits in search Response

Question

I am using ES 7.3.1 and Elasticsearch high level client 7.3.1 We have an alias which comprises of 3 indexes.

Alias Name :  employee_search
Indexes in this alias : contract_employee,permanent_employee,client

I am searching over this alias as

SearchRequest searchReq = new SearchRequest("employee_search");
WrapperQueryBuilder qb = QueryBuilders.wrapperQuery(searchQuery); //i am preparing a dsl query
SearchSourceBuilder sbb = new SearchSourceBuilder();
sbb.query(qb);
searchReq.source(sbb);
SearchResponse resp = esClient.search(searchReq, RequestOptions.DEFAULT);

In response I need an aggregation where I can get index wise hits (which index gave how many hits?) Aggregation which needs to be implemented is

{
  "aggs": {
    "index_wise_count": {
      "terms": {
        "field": "_index"
      }
    }
  }
}

How can I implement this in the existing search response?

What I tried but did not work:

SearchRequest searchReq = new SearchRequest("employee_search");
    WrapperQueryBuilder qb = QueryBuilders.wrapperQuery(searchQuery); //i am preparing a dsl query
    SearchSourceBuilder sbb = new SearchSourceBuilder();
    sbb.query(qb);
    sbb.aggreagation(AggregationBuilders.terms("index_wise_count").field("index"));
    searchReq.source(sbb);
    SearchResponse resp = esClient.search(searchReq, RequestOptions.DEFAULT);

Answer 1

我错过了一个下划线:(

sbb.aggreagation(AggregationBuilders.terms("index_wise_count").field("_index"));