The previous recipe can be extended to support aggregations, to retrieve analytics on indexed data.
You need an up-and-running Elasticsearch installation as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.
A Maven tool, or an IDE that natively supports it for Java programming such as Eclipse or IntelliJ IDEA, must be installed.
The code for this recipe is in the
chapter_14/nativeclient directory and the referred class is
For executing a search with aggregations, we will perform the steps given as follows:
import org.elasticsearch.search.aggregations.AggregationBuilder; ...