[[java-aggs-bucket-geodistance]]
==== Geo Distance Aggregation

Here is how you can use
{ref}/search-aggregations-bucket-geodistance-aggregation.html[Geo Distance Aggregation]
with Java API.


===== Prepare aggregation request

Here is an example on how to create the aggregation request:

[source,java]
--------------------------------------------------
AggregationBuilder aggregation =
        AggregationBuilders
                .geoDistance("agg")
                .field("address.location")
                .point(new GeoPoint(48.84237171118314,2.33320027692004))
                .unit(DistanceUnit.KILOMETERS)
                .addUnboundedTo(3.0)
                .addRange(3.0, 10.0)
                .addRange(10.0, 500.0);
--------------------------------------------------


===== Use aggregation response

Import Aggregation definition classes:

[source,java]
--------------------------------------------------
import org.elasticsearch.search.aggregations.bucket.range.geodistance.GeoDistance;
--------------------------------------------------

[source,java]
--------------------------------------------------
// sr is here your SearchResponse object
GeoDistance agg = sr.getAggregations().get("agg");

// For each entry
for (GeoDistance.Bucket entry : agg.getBuckets()) {
    String key = entry.getKey();            // key as String
    Number from = entry.getFrom();          // bucket from value
    Number to = entry.getTo();              // bucket to value
    long docCount = entry.getDocCount();    // Doc count

    logger.info("key [{}], from [{}], to [{}], doc_count [{}]", key, from, to, docCount);
}
--------------------------------------------------

This will basically produce:

[source,text]
--------------------------------------------------
key [*-3.0], from [0.0], to [3.0], doc_count [161]
key [3.0-10.0], from [3.0], to [10.0], doc_count [460]
key [10.0-500.0], from [10.0], to [500.0], doc_count [4925]
--------------------------------------------------