/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.management.j2ee.statistics;
import javax.management.j2ee.statistics.RangeStatistic;
/**
* This class is the JBoss specific Range Statistics class allowing
* just to increase and resetStats the instance.
*
* @author <a href="mailto:mclaugs@comcast.net">Scott McLaughlin</a>
* @version $Revision: 81025 $
*/
public class RangeStatisticImpl
extends StatisticImpl
implements RangeStatistic
{
// -------------------------------------------------------------------------
// Constants
// -------------------------------------------------------------------------
/** @since 4.0.2 */
private static final long serialVersionUID = -7893492477598566197L;
// -------------------------------------------------------------------------
// Members
// -------------------------------------------------------------------------
protected long current;
protected long highWaterMark;
protected long lowWaterMark;
// -------------------------------------------------------------------------
// Constructors
// -------------------------------------------------------------------------
/**
* Default (no-args) constructor
*/
public RangeStatisticImpl(String pName, String pUnit, String pDescription)
{
super(pName, pUnit, pDescription);
}
// -------------------------------------------------------------------------
// RangeStatistic Implementation
// -------------------------------------------------------------------------
/**
* @return The value of Current
*/
public long getCurrent()
{
return current;
}
/**
* @return The value of HighWaterMark
*/
public long getHighWaterMark()
{
return highWaterMark;
}
/**
* @return The value of LowWaterMark
*/
public long getLowWaterMark()
{
return lowWaterMark;
}
/**
* @return Debug Information about this Instance
*/
public String toString()
{
StringBuffer tmp = new StringBuffer();
tmp.append('[');
tmp.append("low: ");
tmp.append(lowWaterMark);
tmp.append(", high: ");
tmp.append(highWaterMark);
tmp.append(", current: ");
tmp.append(current);
tmp.append(']');
tmp.append(super.toString());
return tmp.toString();
}
// -------------------------------------------------------------------------
// Methods
// -------------------------------------------------------------------------
/**
* Adds a hit to this counter
*/
public void add()
{
set(++current);
}
/**
* Removes a hit to this counter
*/
public void remove()
{
if (current > 0)
{
set(--current);
}
}
/**
* Resets the statistics to the initial values
*/
public void reset()
{
current = 0;
highWaterMark = 0;
lowWaterMark = 0;
super.reset();
}
public void set(long current)
{
this.current = current;
if (current < lowWaterMark)
{
lowWaterMark = current;
}
if (current > highWaterMark)
{
highWaterMark = current;
}
super.set();
}
}