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ESVarianceHandler.java
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ESVarianceHandler.java
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package org.graylog.plugins.enterprise.search.elasticsearch.searchtypes.pivot.series;
import io.searchbox.core.SearchResult;
import io.searchbox.core.search.aggregation.ExtendedStatsAggregation;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.metrics.stats.extended.ExtendedStatsAggregationBuilder;
import org.graylog.plugins.enterprise.search.elasticsearch.ESGeneratedQueryContext;
import org.graylog.plugins.enterprise.search.elasticsearch.searchtypes.pivot.ESPivot;
import org.graylog.plugins.enterprise.search.elasticsearch.searchtypes.pivot.ESPivotSeriesSpecHandler;
import org.graylog.plugins.enterprise.search.searchtypes.pivot.Pivot;
import org.graylog.plugins.enterprise.search.searchtypes.pivot.series.Variance;
import javax.annotation.Nonnull;
import java.util.Optional;
import java.util.stream.Stream;
public class ESVarianceHandler extends ESPivotSeriesSpecHandler<Variance, ExtendedStatsAggregation> {
@Nonnull
@Override
public Optional<AggregationBuilder> doCreateAggregation(String name, Pivot pivot, Variance varianceSpec, ESPivot searchTypeHandler, ESGeneratedQueryContext queryContext) {
final ExtendedStatsAggregationBuilder variance = AggregationBuilders.extendedStats(name).field(varianceSpec.field());
record(queryContext, pivot, varianceSpec, name, ExtendedStatsAggregation.class);
return Optional.of(variance);
}
@Override
public Stream<Value> doHandleResult(Pivot pivot, Variance pivotSpec,
SearchResult searchResult,
ExtendedStatsAggregation varianceAggregation,
ESPivot searchTypeHandler,
ESGeneratedQueryContext esGeneratedQueryContext) {
return Stream.of(ESPivotSeriesSpecHandler.Value.create(pivotSpec.id(), Variance.NAME, varianceAggregation.getVariance()));
}
}