Glassfish example source code file (JVMThreadSystemStatsProvider.java)

This example Glassfish source code file (JVMThreadSystemStatsProvider.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

countstatistic, countstatisticimpl, countstatisticimpl, cpu, description, description, finds, java, managedattribute, managedattribute, management, returns, returns, stringbuffer, stringstatisticimpl

The Glassfish JVMThreadSystemStatsProvider.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 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.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.admin.monitor.jvm;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.StringStatistic;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.external.statistics.impl.StatisticImpl;
import org.glassfish.external.statistics.impl.StringStatisticImpl;
import org.glassfish.gmbal.AMXMetadata;
import org.glassfish.gmbal.Description;
import org.glassfish.gmbal.ManagedAttribute;
import org.glassfish.gmbal.ManagedObject;

/* server.jvm.thread-system */
// v2 mbean: com.sun.appserv:name=thread-system,type=thread-system,category=monitor,server=server
// v3 mbean:
@AMXMetadata(type="thread-system-mon", group="monitoring")
@ManagedObject
@Description( "JVM Thread System Statistics" )
public class JVMThreadSystemStatsProvider {
    
    private ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    
    private StringStatisticImpl allThreadIds = new StringStatisticImpl(
            "LiveThreads", "String", "Returns all live thread IDs" );
    private CountStatisticImpl currentThreadCpuTime = new CountStatisticImpl(
            "CurrentThreadCpuTime", StatisticImpl.UNIT_NANOSECOND,
                "Returns the total CPU time for the current thread in nanoseconds" );
    private CountStatisticImpl currentThreadUserTime = new CountStatisticImpl(
            "CurrentThreadUserTime", StatisticImpl.UNIT_NANOSECOND,
                "Returns the CPU time that the current thread has executed in user mode in nanoseconds" );
    private CountStatisticImpl daemonThreadCount = new CountStatisticImpl(
            "DaemonThreadCount", StatisticImpl.UNIT_COUNT,
                "Returns the current number of live daemon threads" );
    private StringStatisticImpl deadlockedThreads = new StringStatisticImpl(
            "DeadlockedThreads", "String",
                "Finds cycles of threads that are in deadlock waiting to acquire object monitors or ownable synchronizers" );
    private StringStatisticImpl monitorDeadlockedThreads = new StringStatisticImpl(
            "MonitorDeadlockedThreads", "String",
                "Finds cycles of threads that are in deadlock waiting to acquire object monitors" );
    private CountStatisticImpl peakThreadCount = new CountStatisticImpl(
            "PeakThreadCount", StatisticImpl.UNIT_COUNT,
                "Returns the peak live thread count since the Java virtual machine started or peak was reset" );
    private CountStatisticImpl threadCount = new CountStatisticImpl(
            "ThreadCount", StatisticImpl.UNIT_COUNT,
                "Returns the current number of live threads including both daemon and non-daemon threads" );
    private CountStatisticImpl totalStartedThreadCount = new CountStatisticImpl(
            "TotalStartedThreadCount", StatisticImpl.UNIT_COUNT,
                "Returns the total number of threads created and also started since the Java virtual machine started" );

    @ManagedAttribute(id="allthreadids")
    @Description( "Returns all live thread IDs" )
    public StringStatistic getAllThreadIds() {
        long[] ids = this.threadBean.getAllThreadIds();
        StringBuffer sb = new StringBuffer();
        boolean first = true;
        for (long id : ids) {
            if(first)
                first = false;
            else
                sb.append(',');

            sb.append(id);
        }
        this.allThreadIds.setCurrent(sb.toString());
        return allThreadIds;
    }

    @ManagedAttribute(id="currentthreadcputime")
    @Description( "Returns the total CPU time for the current thread in nanoseconds" )
    public CountStatistic getCurrentThreadCpuTime() {
        this.currentThreadCpuTime.setCount(threadBean.getCurrentThreadCpuTime());
        return this.currentThreadCpuTime;
    }

    @ManagedAttribute(id="currentthreadusertime")
    @Description( "Returns the CPU time that the current thread has executed in user mode in nanoseconds" )
    public CountStatistic getCurrentThreadUserTime() {
        this.currentThreadUserTime.setCount(threadBean.getCurrentThreadUserTime());
        return this.currentThreadUserTime;
    }

    @ManagedAttribute(id="daemonthreadcount")
    @Description( "Returns the current number of live daemon threads" )
    public CountStatistic getDaemonThreadCount() {
        this.daemonThreadCount.setCount(threadBean.getDaemonThreadCount());
        return this.daemonThreadCount;
    }

    @ManagedAttribute(id="deadlockedthreads")
    @Description( "Finds cycles of threads that are in deadlock waiting to acquire object monitors or ownable synchronizers" )
    public StringStatistic getDeadlockedThreads() {
        long[] threads = threadBean.findDeadlockedThreads();
        if (threads == null) {
            this.deadlockedThreads.setCurrent("None of the threads are deadlocked.");
        } else {
            StringBuffer sb = new StringBuffer();
            for (long thread : threads) {
                sb.append(thread);
                sb.append(',');
            }
            this.deadlockedThreads.setCurrent(sb.toString());
        }
        return deadlockedThreads;
    }

    @ManagedAttribute(id="monitordeadlockedthreads")
    @Description( "Finds cycles of threads that are in deadlock waiting to acquire object monitors" )
    public StringStatistic getMonitorDeadlockedThreads() {
        long[] threads = threadBean.findMonitorDeadlockedThreads();
        if (threads == null) {
            this.monitorDeadlockedThreads.setCurrent("None of the threads are monitor deadlocked.");
        } else {
            StringBuffer sb = new StringBuffer();
            for (long thread : threads) {
                sb.append(thread);
                sb.append(',');
            }
            this.monitorDeadlockedThreads.setCurrent(sb.toString());
        }
        return this.monitorDeadlockedThreads;
    }

    @ManagedAttribute(id="peakthreadcount")
    @Description( "Returns the peak live thread count since the Java virtual machine started or peak was reset" )
    public CountStatistic getPeakThreadCount() {
        this.peakThreadCount.setCount(threadBean.getPeakThreadCount());
        return this.peakThreadCount;
    }

    @ManagedAttribute(id="threadcount")
    @Description( "Returns the current number of live threads including both daemon and non-daemon threads" )
    public CountStatistic getThreadCount() {
        threadCount.setCount(threadBean.getThreadCount());
        return threadCount;
    }

    @ManagedAttribute(id="totalstartedthreadcount")
    @Description( "Returns the total number of threads created and also started since the Java virtual machine started" )
    public CountStatistic getTotalStartedThreadCount() {
        totalStartedThreadCount.setCount(threadBean.getTotalStartedThreadCount());
        return totalStartedThreadCount;
    }
}