/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.core.util.counters.impl;
import org.mule.runtime.core.util.counters.CounterFactory.Type;
public class InstantRate extends AggregateCounter {
private double firstTime;
private double lastTime;
private double value;
public InstantRate(String name, AbstractCounter base) {
super(name, Type.INSTANT_RATE, base);
}
@Override
public double nextValue() {
if (firstTime == 0 || firstTime == lastTime) {
return Double.NaN;
} else {
return value / (lastTime - firstTime) * 1000.0;
}
}
@Override
public void doCompute() {
firstTime = lastTime;
lastTime = System.currentTimeMillis();
value = getBase().nextValue();
}
}