org.apache.flink.runtime.metrics.DescriptiveStatisticsHistogramStatistics Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.metrics;
import org.apache.flink.metrics.HistogramStatistics;
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
import java.util.Arrays;
/**
* DescriptiveStatistics histogram statistics implementation returned by {@link DescriptiveStatisticsHistogram}.
* The statistics class wraps a {@link DescriptiveStatistics} instance and forwards the method calls accordingly.
*/
public class DescriptiveStatisticsHistogramStatistics extends HistogramStatistics {
private final DescriptiveStatistics descriptiveStatistics;
public DescriptiveStatisticsHistogramStatistics(DescriptiveStatistics latencyHistogram) {
this.descriptiveStatistics = latencyHistogram;
}
@Override
public double getQuantile(double quantile) {
return descriptiveStatistics.getPercentile(quantile * 100);
}
@Override
public long[] getValues() {
return Arrays.stream(descriptiveStatistics.getValues()).mapToLong(i -> (long) i).toArray();
}
@Override
public int size() {
return (int) descriptiveStatistics.getN();
}
@Override
public double getMean() {
return descriptiveStatistics.getMean();
}
@Override
public double getStdDev() {
return descriptiveStatistics.getStandardDeviation();
}
@Override
public long getMax() {
return (long) descriptiveStatistics.getMax();
}
@Override
public long getMin() {
return (long) descriptiveStatistics.getMin();
}
}
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