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Glassfish example source code file (JVMThreadInfoStatsProvider.java)

This example Glassfish source code file (JVMThreadInfoStatsProvider.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, description, description, id, managedattribute, management, returns, returns, string, stringstatistic, stringstatisticimpl, threadinfo, threadinfo

The Glassfish JVMThreadInfoStatsProvider.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]"
 *
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 * 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
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 */

package org.glassfish.admin.monitor.jvm;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
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.thread-1 */
// v2 mbean: com.sun.appserv:name=thread-1,type=threadinfo,category=monitor,server=server
// v3 mbean:
@AMXMetadata(type="threadinfo-mon", group="monitoring")
@ManagedObject
@Description( "JVM Thread Info Statistics" )
public class JVMThreadInfoStatsProvider {
    
    private ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    private ThreadInfo threadInfo;
    private static String newline = System.getProperty("line.separator");
    
    private CountStatisticImpl blockedCount = new CountStatisticImpl(
            "BlockedCount", StatisticImpl.UNIT_COUNT,
            "Returns the total number of times that the thread associated with this ThreadInfo blocked to enter or reenter a monitor" );
    private CountStatisticImpl blockedTime = new CountStatisticImpl(
            "BlockedTime", StatisticImpl.UNIT_MILLISECOND,
                "Returns the approximate accumulated elapsed time (in milliseconds) that the thread associated with this ThreadInfo has blocked to enter or reenter a monitor since thread contention monitoring is enabled" );
    private StringStatisticImpl lockName = new StringStatisticImpl(
            "LockName", "String",
                "Returns the string representation of an object for which the thread associated with this ThreadInfo is blocked waiting" );
    private CountStatisticImpl lockOwnerId = new CountStatisticImpl(
            "LockOwnerId", "String",
                "Returns the ID of the thread which owns the object for which the thread associated with this ThreadInfo is blocked waiting" );
    private StringStatisticImpl lockOwnerName = new StringStatisticImpl(
            "LockOwnerName", "String",
                "Returns the name of the thread which owns the object for which the thread associated with this ThreadInfo is blocked waiting" );
    private StringStatisticImpl stackTrace = new StringStatisticImpl(
            "StackTrace", "String",
                "Returns the stack trace of the thread associated with this ThreadInfo" );
    private CountStatisticImpl threadId = new CountStatisticImpl(
            "ThreadId", "String",
                "Returns the ID of the thread associated with this ThreadInfo" );
    private StringStatisticImpl threadName = new StringStatisticImpl(
            "ThreadName", "String",
                "Returns the name of the thread associated with this ThreadInfo" );
    private StringStatisticImpl threadState = new StringStatisticImpl(
            "ThreadState", "String",
                "Returns the state of the thread associated with this ThreadInfo" );
    private CountStatisticImpl waitedCount = new CountStatisticImpl(
            "WaitingCount", StatisticImpl.UNIT_COUNT,
                "Returns the total number of times that the thread associated with this ThreadInfo waited for notification" );
    private CountStatisticImpl waitedTime = new CountStatisticImpl(
            "WaitingTime", StatisticImpl.UNIT_MILLISECOND,
                "Returns the approximate accumulated elapsed time (in milliseconds) that the thread associated with this ThreadInfo has waited for notification since thread contention monitoring is enabled" );

    public JVMThreadInfoStatsProvider(ThreadInfo info) {
        this.threadInfo = info;
    }

    @ManagedAttribute(id="blockedcount")
    @Description( "Returns the total number of times that the thread associated with this ThreadInfo blocked to enter or reenter a monitor" )
    public CountStatistic getBlockedCount() {
        blockedCount.setCount(threadInfo.getBlockedCount());
        return blockedCount;
    }

    @ManagedAttribute(id="blockedtime")
    @Description( "Returns the approximate accumulated elapsed time (in milliseconds) that the thread associated with this ThreadInfo has blocked to enter or reenter a monitor since thread contention monitoring is enabled" )
    public CountStatistic getBlockedTime() {
        blockedTime.setCount(threadInfo.getBlockedTime());
        return blockedTime;
    }

    @ManagedAttribute(id="lockname")
    @Description( "Returns the string representation of an object for which the thread associated with this ThreadInfo is blocked waiting" )
    public StringStatistic getLockName() {
        String name = threadInfo.getLockName();
        if (name == null) {
            lockName.setCurrent("Thread is not waiting on monitor lock.");
        } else {
            lockName.setCurrent(name);
        }
        return lockName;
    }

    @ManagedAttribute(id="lockownerid")
    @Description( "Returns the ID of the thread which owns the object for which the thread associated with this ThreadInfo is blocked waiting" )
    public CountStatistic getLockOwnerId() {
        lockOwnerId.setCount(threadInfo.getLockOwnerId());
        return lockOwnerId;
    }

    @ManagedAttribute(id="lockownername")
    @Description( "Returns the name of the thread which owns the object for which the thread associated with this ThreadInfo is blocked waiting" )
    public StringStatistic getLockOwnerName() {
        String name = threadInfo.getLockOwnerName();
        if (name == null) {
            lockOwnerName.setCurrent("None of the other threads is holding any monitors of this thread.");
        } else {
            lockOwnerName.setCurrent(name);
        }
        return lockOwnerName;
    }

    @ManagedAttribute(id="stacktrace")
    @Description( "Returns the stack trace of the thread associated with this ThreadInfo" )
    public StringStatistic getStackTrace() {
        StackTraceElement[] elements = threadInfo.getStackTrace();
        StringBuffer sb = new StringBuffer();
        for (StackTraceElement ste : elements) {
            sb.append(ste.toString());
            sb.append(',');
        }
        stackTrace.setCurrent(sb.toString());
        return stackTrace;
    }

    @ManagedAttribute(id="threadid")
    @Description( "Returns the ID of the thread associated with this ThreadInfo" )
    public CountStatistic getThreadId() {
        threadId.setCount(threadInfo.getThreadId());
        return threadId;
    }

    @ManagedAttribute(id="threadname")
    @Description( "Returns the name of the thread associated with this ThreadInfo" )
    public StringStatistic getThreadName() {
        threadName.setCurrent(threadInfo.getThreadName());
        return threadName;
    }

    @ManagedAttribute(id="threadstate")
    @Description( "Returns the state of the thread associated with this ThreadInfo" )
    public StringStatistic getThreadState() {
        threadState.setCurrent(threadInfo.getThreadState().toString());
        return threadState;
    }

    @ManagedAttribute(id="waitedcount")
    @Description( "Returns the total number of times that the thread associated with this ThreadInfo waited for notification" )
    public CountStatistic getWaitedCount() {
        waitedCount.setCount(threadInfo.getWaitedCount());
        return waitedCount;
    }

    @ManagedAttribute(id="waitedtime")
    @Description( "Returns the approximate accumulated elapsed time (in milliseconds) that the thread associated with this ThreadInfo has waited for notification since thread contention monitoring is enabled" )
    public CountStatistic getWaitedTime() {
        waitedTime.setCount(threadInfo.getWaitedTime());
        return waitedTime;
    }
}

Other Glassfish examples (source code examples)

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