com.proofpoint.stats.TimedStat.java Source code

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Here is the source code for com.proofpoint.stats.TimedStat.java

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/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * Licensed 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 com.proofpoint.stats;

import com.proofpoint.units.Duration;
import org.apache.commons.math.stat.descriptive.DescriptiveStatistics;
import org.apache.commons.math.stat.descriptive.SynchronizedDescriptiveStatistics;
import org.weakref.jmx.Managed;

import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

public class TimedStat {
    private final DescriptiveStatistics timedStatistics;
    private final AtomicLong count = new AtomicLong();

    public TimedStat() {
        this(5000);
    }

    public TimedStat(int windowSize) {
        timedStatistics = new SynchronizedDescriptiveStatistics(windowSize);
    }

    @Managed
    public long getCount() {
        return count.get();
    }

    @Managed
    public double getMin() {
        return timedStatistics.getMin();
    }

    @Managed
    public double getMax() {
        return timedStatistics.getMax();
    }

    @Managed
    public double getMean() {
        return timedStatistics.getMean();
    }

    @Managed
    public double getPercentile(double percentile) {
        if (percentile < 0 || percentile > 1) {
            throw new IllegalArgumentException("percentile must be between 0 and 1");
        }
        return timedStatistics.getPercentile(percentile * 100);
    }

    @Managed(description = "50th Percentile Measurement")
    public double getTP50() {
        return timedStatistics.getPercentile(50);
    }

    @Managed(description = "90th Percentile Measurement")
    public double getTP90() {
        return timedStatistics.getPercentile(90);
    }

    @Managed(description = "99th Percentile Measurement")
    public double getTP99() {
        return timedStatistics.getPercentile(99);
    }

    @Managed(description = "99.9th Percentile Measurement")
    public double getTP999() {
        return timedStatistics.getPercentile(99.9);
    }

    public void addValue(double value, TimeUnit timeUnit) {
        addValue(new Duration(value, timeUnit));
    }

    public void addValue(Duration duration) {
        timedStatistics.addValue(duration.toMillis());
        count.incrementAndGet();
    }

    public <T> T time(Callable<T> callable) throws Exception {
        long start = System.nanoTime();
        T result = callable.call();
        addValue(Duration.nanosSince(start));
        return result;
    }
}