/*
* @(#)$Id: codetemplate_xbird.xml 943 2006-09-13 07:03:37Z yui $
*
* Copyright 2006-2008 Makoto YUI
*
* Licensed 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.server.services;
import java.util.Timer;
import java.util.TimerTask;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import xbird.config.Settings;
import xbird.server.ServiceException;
import xbird.util.string.StringUtils;
import xbird.util.system.SystemUtils;
import xbird.util.system.SystemUtils.CPUInfo;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class PerfmonService extends ServiceBase {
private static final Log LOG = LogFactory.getLog("xbird.PerfMon");
public static final String SRV_NAME = "PerfMon";
private final int perfmonIntervalnMills;
private Timer _timer = null;
public PerfmonService() {
this(Integer.parseInt(Settings.get("xbird.perfmon.interval", "5000")));
}
public PerfmonService(int interval) {
super(SRV_NAME);
this.perfmonIntervalnMills = interval;
}
public void start() throws ServiceException {
if(perfmonIntervalnMills == -1 || !LOG.isInfoEnabled()) {
return;
}
PerfmonTask task = new PerfmonTask();
Timer timer = new Timer(SRV_NAME, true);
timer.scheduleAtFixedRate(task, 1000, perfmonIntervalnMills);
this._timer = timer;
this._status = Status.started;
}
public void stop() throws ServiceException {
if(_timer != null) {
_timer.cancel();
this._timer = null;
}
this._status = Status.stopped;
}
private static final class PerfmonTask extends TimerTask {
private CPUInfo prevCpuInfo;
public PerfmonTask() {
super();
this.prevCpuInfo = new CPUInfo();
}
@Override
public void run() {
CPUInfo newCpuInfo = SystemUtils.getCPUInfo(prevCpuInfo);
float cpuUsage = newCpuInfo.getCpuLoad();
long heapUsed = SystemUtils.getHeapUsedMemory();
if(LOG.isDebugEnabled()) {
String line = "cpuUsage: " + String.format("%.2f", cpuUsage) + " %, usedHeap: "
+ StringUtils.displayBytesSize(heapUsed);
LOG.debug(line);
}
this.prevCpuInfo = newCpuInfo;
}
@Override
public boolean cancel() {
this.prevCpuInfo = null;
return super.cancel();
}
}
}