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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2009-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
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* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
*
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*/
package org.glassfish.external.statistics.impl;
import org.glassfish.external.statistics.RangeStatistic;
import java.util.Map;
import java.lang.reflect.*;
/**
* @author Sreenivas Munnangi
*/
public final class RangeStatisticImpl extends StatisticImpl
implements RangeStatistic, InvocationHandler {
private long currentVal = 0L;
private long highWaterMark = Long.MIN_VALUE;
private long lowWaterMark = Long.MAX_VALUE;
private final long initCurrentVal;
private final long initHighWaterMark;
private final long initLowWaterMark;
private final RangeStatistic rs =
(RangeStatistic) Proxy.newProxyInstance(
RangeStatistic.class.getClassLoader(),
new Class[] { RangeStatistic.class },
this);
public RangeStatisticImpl(long curVal, long highMark, long lowMark,
String name, String unit, String desc,
long startTime, long sampleTime) {
super(name, unit, desc, startTime, sampleTime);
currentVal = curVal;
initCurrentVal = curVal;
highWaterMark = highMark;
initHighWaterMark = highMark;
lowWaterMark = lowMark;
initLowWaterMark = lowMark;
}
public synchronized RangeStatistic getStatistic() {
return rs;
}
public synchronized Map getStaticAsMap() {
Map m = super.getStaticAsMap();
m.put("current", getCurrent());
m.put("lowwatermark", getLowWaterMark());
m.put("highwatermark", getHighWaterMark());
return m;
}
public synchronized long getCurrent() {
return currentVal;
}
public synchronized void setCurrent(long curVal) {
currentVal = curVal;
lowWaterMark = (curVal >= lowWaterMark ? lowWaterMark : curVal);
highWaterMark = (curVal >= highWaterMark ? curVal : highWaterMark);
sampleTime = System.currentTimeMillis();
}
/**
* Returns the highest value of this statistic, since measurement started.
*/
public synchronized long getHighWaterMark() {
return highWaterMark;
}
public synchronized void setHighWaterMark(long hwm) {
highWaterMark = hwm;
}
/**
* Returns the lowest value of this statistic, since measurement started.
*/
public synchronized long getLowWaterMark() {
return lowWaterMark;
}
public synchronized void setLowWaterMark(long lwm) {
lowWaterMark = lwm;
}
@Override
public synchronized void reset() {
super.reset();
currentVal = initCurrentVal;
highWaterMark = initHighWaterMark;
lowWaterMark = initLowWaterMark;
sampleTime = -1L;
}
public synchronized String toString() {
return super.toString() + NEWLINE +
"Current: " + getCurrent() + NEWLINE +
"LowWaterMark: " + getLowWaterMark() + NEWLINE +
"HighWaterMark: " + getHighWaterMark();
}
// todo: equals implementation
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
checkMethod(m);
Object result;
try {
result = m.invoke(this, args);
} catch (InvocationTargetException e) {
throw e.getTargetException();
} catch (Exception e) {
throw new RuntimeException("unexpected invocation exception: " +
e.getMessage());
}
return result;
}
}
