Executing a search with aggregations

The next step after searching in Elasticsearch is to execute the aggregations. The elastic4s DSL also provides support for aggregation so it can be built in a safer typed way.

Getting ready

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 supports Scala programming, such as Eclipse (ScalaIDE) or IntelliJ IDEA, with the Scala plugin should be installed.

The code for this recipe can be found in the chapter_15/elastic4s_sample file and the referred class is AggregationExample.

How to do it...

For executing a search with aggregations, we will perform the following steps:

1. We need to import the classes needed for the aggregations:

           import com.sksamuel.elastic4s.ElasticDsl._ 
           import 
            org.elasticsearch.search.aggregations.metrics.geocentroid
            .InternalGeoCentroid 
           import...