39 lines
1.0 KiB
Plaintext
39 lines
1.0 KiB
Plaintext
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[[java-aggs-metrics-cardinality]]
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==== Cardinality Aggregation
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Here is how you can use
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{ref}/search-aggregations-metrics-cardinality-aggregation.html[Cardinality Aggregation]
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with Java API.
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===== Prepare aggregation request
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Here is an example on how to create the aggregation request:
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[source,java]
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--------------------------------------------------
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MetricsAggregationBuilder aggregation =
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AggregationBuilders
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.cardinality("agg")
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.field("tags");
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--------------------------------------------------
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===== Use aggregation response
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Import Aggregation definition classes:
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[source,java]
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--------------------------------------------------
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import org.elasticsearch.search.aggregations.metrics.cardinality.Cardinality;
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--------------------------------------------------
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[source,java]
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--------------------------------------------------
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// sr is here your SearchResponse object
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Cardinality agg = sr.getAggregations().get("agg");
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long value = agg.getValue();
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--------------------------------------------------
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