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Glassfish example source code file (ThreadPoolStatsProvider.java)

This example Glassfish source code file (ThreadPoolStatsProvider.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, extendedthreadpool, managedattribute, override, probelistener, probelistener, probeparam, probeparam, provides, string, string

The Glassfish ThreadPoolStatsProvider.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:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
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 */

package com.sun.enterprise.v3.services.impl.monitor.stats;

import com.sun.grizzly.util.ExtendedThreadPool;
import org.glassfish.external.probe.provider.annotations.ProbeListener;
import org.glassfish.external.probe.provider.annotations.ProbeParam;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.annotations.Reset;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.gmbal.AMXMetadata;
import org.glassfish.gmbal.Description;
import org.glassfish.gmbal.ManagedAttribute;
import org.glassfish.gmbal.ManagedObject;

/**
 * Thread Pool statistics
 * 
 * @author Alexey Stashok
 */
@AMXMetadata(type = "thread-pool-mon", group = "monitoring")
@ManagedObject
@Description("Thread Pool Statistics")
public class ThreadPoolStatsProvider implements StatsProvider {

    private final String name;
    protected final CountStatisticImpl maxThreadsCount = new CountStatisticImpl("MaxThreads", "count", "Maximum number of threads allowed in the thread pool");
    protected final CountStatisticImpl coreThreadsCount = new CountStatisticImpl("CoreThreads", "count", "Core number of threads in the thread pool");
    
    protected final CountStatisticImpl totalExecutedTasksCount = new CountStatisticImpl("TotalExecutedTasksCount", "count", "Provides the total number of tasks, which were executed by the thread pool");
    protected final CountStatisticImpl currentThreadCount = new CountStatisticImpl("CurrentThreadCount", "count", "Provides the number of request processing threads currently in the listener thread pool");
    protected final CountStatisticImpl currentThreadsBusy = new CountStatisticImpl("CurrentThreadsBusy", "count", "Provides the number of request processing threads currently in use in the listener thread pool serving requests");

    protected volatile ExtendedThreadPool threadPool;

    public ThreadPoolStatsProvider(String name) {
        this.name = name;
    }

    @Override
    public Object getStatsObject() {
        return threadPool;
    }

    @Override
    public void setStatsObject(Object object) {
        if (object instanceof ExtendedThreadPool) {
            threadPool = (ExtendedThreadPool) object;
        } else {
            threadPool = null;
        }
    }

    @ManagedAttribute(id = "maxthreads")
    @Description("Maximum number of threads allowed in the thread pool")
    public CountStatistic getMaxThreadsCount() {
        return maxThreadsCount;
    }

    @ManagedAttribute(id = "corethreads")
    @Description("Core number of threads in the thread pool")
    public CountStatistic getCoreThreadsCount() {
        return coreThreadsCount;
    }

    @ManagedAttribute(id = "totalexecutedtasks")
    @Description("Provides the total number of tasks, which were executed by the thread pool")
    public CountStatistic getTotalExecutedTasksCount() {
        return totalExecutedTasksCount;
    }

    @ManagedAttribute(id = "currentthreadcount")
    @Description("Provides the number of request processing threads currently in the listener thread pool")
    public CountStatistic getCurrentThreadCount() {
        return currentThreadCount;
    }

    @ManagedAttribute(id = "currentthreadsbusy")
    @Description("Provides the number of request processing threads currently in use in the listener thread pool serving requests.")
    public CountStatistic getCurrentThreadsBusy() {
        return currentThreadsBusy;
    }

    @ProbeListener("glassfish:kernel:thread-pool:setMaxThreadsEvent")
    public void setMaxThreadsEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("maxNumberOfThreads") int maxNumberOfThreads) {

        if (name.equals(monitoringId)) {
            maxThreadsCount.setCount(maxNumberOfThreads);
        }
    }

    @ProbeListener("glassfish:kernel:thread-pool:setCoreThreadsEvent")
    public void setCoreThreadsEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("coreNumberOfThreads") int coreNumberOfThreads) {

        if (name.equals(monitoringId)) {
            coreThreadsCount.setCount(coreNumberOfThreads);
        }
    }

    @ProbeListener("glassfish:kernel:thread-pool:threadAllocatedEvent")
    public void threadAllocatedEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("threadId") String threadId) {

        if (name.equals(monitoringId)) {
            currentThreadCount.increment();
        }
    }

    @ProbeListener("glassfish:kernel:thread-pool:threadReleasedEvent")
    public void threadReleasedEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("threadId") String threadId) {

        if (name.equals(monitoringId)) {
            currentThreadCount.decrement();
        }
    }

    @ProbeListener("glassfish:kernel:thread-pool:threadDispatchedFromPoolEvent")
    public void threadDispatchedFromPoolEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("threadId") String threadId) {

        if (name.equals(monitoringId)) {
            currentThreadsBusy.increment();
        }
    }

    @ProbeListener("glassfish:kernel:thread-pool:threadReturnedToPoolEvent")
    public void threadReturnedToPoolEvent(
            @ProbeParam("monitoringId") String monitoringId,
            @ProbeParam("threadPoolName") String threadPoolName,
            @ProbeParam("threadId") String threadId) {

        if (name.equals(monitoringId)) {
            totalExecutedTasksCount.increment();
            currentThreadsBusy.decrement();
        }
    }

    @Reset
    public void reset() {
        final ExtendedThreadPool threadPoolObject = threadPool;
        if (threadPoolObject != null) {
            maxThreadsCount.setCount(threadPoolObject.getMaximumPoolSize());
            coreThreadsCount.setCount(threadPoolObject.getCorePoolSize());
            currentThreadCount.setCount(threadPoolObject.getPoolSize());
            currentThreadsBusy.setCount(threadPoolObject.getActiveCount());
        }

        totalExecutedTasksCount.setCount(0);
    }
}

Other Glassfish examples (source code examples)

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