HistogramMetric.java

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// 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
//
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package org.apache.doris.metric;

import com.codahale.metrics.ExponentiallyDecayingReservoir;
import com.codahale.metrics.Histogram;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class HistogramMetric {
    private final String name;
    private final Histogram histogram;
    private final List<MetricLabel> labels;

    public HistogramMetric(String name, List<MetricLabel> labels) {
        this.name = name;
        this.histogram = new Histogram(new ExponentiallyDecayingReservoir());
        this.labels = Collections.unmodifiableList(new ArrayList<>(labels));
    }

    public void update(long value) {
        histogram.update(value);
    }

    public String getName() {
        return name;
    }

    public Histogram getHistogram() {
        return histogram;
    }

    public List<MetricLabel> getLabels() {
        return labels;
    }
}