/*************************************************************************
* Copyright 2009-2014 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
************************************************************************/
package com.eucalyptus.stats.sensors;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.apache.log4j.Logger;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import java.util.Map;
import java.util.concurrent.Callable;
/**
* Static enums for sensors on JVM Memory
*/
public enum JvmThreadSensor implements Callable<Map<String, Object>> {
INSTANCE {
@Override
public Map<String, Object> call() throws Exception {
Map<String, Object> result = Maps.newHashMap();
try {
final ThreadMXBean managerBean = ManagementFactory.getThreadMXBean();
if (managerBean != null) {
long[] lockedThreadList = null;
long[] monLockedThreadList = null;
if (managerBean.isObjectMonitorUsageSupported()) {
if (managerBean.isSynchronizerUsageSupported()) {
//monitor and owned-synchronizer detection
lockedThreadList = managerBean.findDeadlockedThreads();
} else {
//monitor-only detection
monLockedThreadList = managerBean.findMonitorDeadlockedThreads();
}
}
result.put("DeadlockedThreadCount", lockedThreadList == null ? "" : lockedThreadList.length);
result.put("DeadlockedThreads", lockedThreadList == null ? "" : Joiner.on(',').join(Lists.newArrayList(lockedThreadList)));
result.put("MonitorDeadlockedThreadCount", monLockedThreadList == null ? "" : monLockedThreadList.length);
result.put("MonitorDeadlockedThreadCount", monLockedThreadList == null ? "" : Joiner.on(',').join(Lists.newArrayList(lockedThreadList)));
result.put("ThreadCount", managerBean.getThreadCount());
result.put("TotalStartedThreadCount", managerBean.getTotalStartedThreadCount());
result.put("PeakThreadCount", managerBean.getPeakThreadCount());
result.put("DaemonThreadCount", managerBean.getDaemonThreadCount());
}
} catch (Throwable f) {
LOG.warn("Failed reading heap/non-heap memory usage via mxbean. Continuing.", f);
}
return result;
}
};
private static final Logger LOG = Logger.getLogger(JvmThreadSensor.class);
}