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Glassfish example source code file (JVMThreadStats.java)

This example Glassfish source code file (JVMThreadStats.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, countstatistic, jvmthreadstats, jvmthreadstats, stats, stats, stringstatistic, stringstatistic

The Glassfish JVMThreadStats.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 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 com.sun.enterprise.admin.monitor.stats;
import org.glassfish.j2ee.statistics.Stats;
import org.glassfish.j2ee.statistics.CountStatistic;
import com.sun.enterprise.admin.monitor.stats.StringStatistic;

/**
 * A Stats interface, to expose the monitoring information 
 * about the thread system of the JVM.
 * @since 8.1
 */
public interface JVMThreadStats extends Stats {
    
    /**
     * Returns the current number of live daemon and non-daemon 
     * threads
     * @return CountStatistic   current number of live threads
     */
    public CountStatistic getThreadCount();
    
    /**
     * Returns the peak live thread count, since the JVM started or
     * the peak was reset
     * @return CountStatistic   peak live thread count
     */
    public CountStatistic getPeakThreadCount();
    
    /**
     * Returns the total number of threads created and also started
     * since the JVM started
     * @return CountStatistic   total number of threads started
     */
    public CountStatistic getTotalStartedThreadCount();
    
    /**
     * Returns the current number of live daemon threads
     * @return CountStatistic   current number of live daemon threads
     */
    public CountStatistic getDaemonThreadCount();
    
    /**
     * Returns a comma separated list of all live thread ids
     * @return StringStatistic  live thread ids
     */
    public StringStatistic getAllThreadIds();
    
    /**
     * Returns the CPU time for the current thread in nanoseconds, if
     * CPU time measurement is enabled. Else returns -1
     * @return  CountStatistic  CPU time for the current thread
     */
    public CountStatistic getCurrentThreadCPUTime();
    
    /**
     * Returns a comma separated list of thread ids that are
     * monitor deadlocked
     * @return StringStatistic
     */
    public StringStatistic getMonitorDeadlockedThreads();
    
}

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