/*
* Copyright 2005-2014 Red Hat, Inc.
* Red Hat 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 io.fabric8.apmagent.metrics;
import com.codahale.metrics.Timer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class MethodMetrics {
protected final Timer timer;
private final String name;
private final double rateFactor;
private final double durationFactor;
private int percentage;
private boolean active = true;
/**
* Constructor.
*
* @param name - the fully qualified method name
*/
public MethodMetrics(String name) {
this.name = name;
this.timer = new Timer();
this.rateFactor = TimeUnit.SECONDS.toSeconds(1);
this.durationFactor = 1.0 / TimeUnit.MILLISECONDS.toNanos(1);
}
public String getName() {
return name;
}
public boolean isActive() {
return active;
}
public void setActive(boolean active) {
this.active = active;
}
public long getCount() {
return timer.getCount();
}
public double getMeanRate() {
return timer.getMeanRate() * rateFactor;
}
public double getOneMinuteRate() {
return timer.getOneMinuteRate() * rateFactor;
}
public double getFiveMinuteRate() {
return timer.getFiveMinuteRate() * rateFactor;
}
public double getFifteenMinuteRate() {
return timer.getFifteenMinuteRate() * rateFactor;
}
public double getMin() {
return timer.getSnapshot().getMin() * durationFactor;
}
public double getMax() {
return timer.getSnapshot().getMax() * durationFactor;
}
public double getMean() {
return timer.getSnapshot().getMean() * durationFactor;
}
public double getStdDev() {
return timer.getSnapshot().getStdDev() * durationFactor;
}
public double get50thPercentile() {
return timer.getSnapshot().getMedian() * durationFactor;
}
public double get75thPercentile() {
return timer.getSnapshot().get75thPercentile() * durationFactor;
}
public double get95thPercentile() {
return timer.getSnapshot().get95thPercentile() * durationFactor;
}
public double get98thPercentile() {
return timer.getSnapshot().get98thPercentile() * durationFactor;
}
public double get99thPercentile() {
return timer.getSnapshot().get99thPercentile() * durationFactor;
}
public double get999thPercentile() {
return timer.getSnapshot().get999thPercentile() * durationFactor;
}
/**
* average amount of time for a method multiplied by the number of times called
*
* @return estimated load
*/
public double getLoad() {
return timer.getSnapshot().size() * getMean();
}
public int getPercentage() {
return percentage;
}
public void setPercentage(int percentage) {
this.percentage = percentage;
}
public long[] values() {
return timer.getSnapshot().getValues();
}
public void update(long elapsed) {
if (elapsed >= 0) {
timer.update(elapsed, TimeUnit.NANOSECONDS);
}
}
public String toString() {
return "MethodMetrics:" + getName();
}
public static List<? extends MethodMetrics> sortedMetrics(Collection<? extends MethodMetrics> collection) {
ArrayList<? extends MethodMetrics> list = new ArrayList<>(collection);
Collections.sort(list, new Comparator<MethodMetrics>() {
@Override
public int compare(MethodMetrics methodMetrics1, MethodMetrics methodMetrics2) {
return (int) ((int) methodMetrics2.getLoad() - (int) methodMetrics1.getLoad());
}
});
//calculate the percentage
int totalLoad = 0;
for (MethodMetrics m : list) {
totalLoad += m.getLoad();
}
for (MethodMetrics m : list) {
int percentage = (int) ((m.getLoad() * 100) / totalLoad);
m.setPercentage(percentage);
}
return list;
}
}