如何使用Java API获得所有字段的方面值

Question

I'm new to Elasticsearch and tried to query some sample documents. I issued the following query using the Java API . This query fetched me the correct result. It returned the names of all categories. Now I want the count of all names of a category. Could you explain me how to do that? I'm sorry for my bad English.

SearchResponse sr = client.prepareSearch()
         .addField("Category")
         .setQuery(QueryBuilders.matchAllQuery())
         .addFacet(FacetBuilders.termsFacet("f")
         .field("Category"))
         .execute()
         .actionGet();

Answer 1

Look at the Count API to count your results if you not want to get the result set (matched documents) but only the count.

If you want to get the result set, you get the result size in the response for every filter or query request too.