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* Copyright (c) 2015
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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*******************************************************************************/
package jsettlers.common.logging;
import java.util.Collections;
import java.util.List;
import java.util.Vector;
/**
* This class implements a simple stop watch that records the time in milliseconds and prints
* the average, mean, min and max of all measured measurements.
*
* @author codingberlin
*/
public class StatisticsStopWatch extends StopWatch {
private final List<Long> measurements = new Vector<Long>();
@Override
public long now() {
return System.currentTimeMillis();
}
@Override
protected String getUnit() {
return "ms";
}
@Override
public void stop(String leadingText) {
measurements.add(getDiff());
Collections.sort(measurements);
}
@Override
public String toString() {
if (measurements.isEmpty()) {
return " -> no measurements taken yet";
}
return " -> number of measurements: " + measurements.size()
+ ", min: " + measurements.get(0) + " " + getUnit()
+ ", average: " + calculateAverage(measurements) + " " + getUnit()
+ ", median: " + getMedian() + " " + getUnit()
+ ", max: " + getMax() + " " + getUnit();
}
public long getMedian() {
return measurements.get((int) Math.floor(measurements.size() / 2));
}
public long getMax() {
return measurements.get(measurements.size() - 1);
}
private double calculateAverage(List<Long> measurements) {
long sum = 0;
if(!measurements.isEmpty()) {
for (Long measurement : measurements) {
sum += measurement;
}
return sum / measurements.size();
}
return sum;
}
}