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Glassfish example source code file (JVMMemoryStatsProvider.java)

This example Glassfish source code file (JVMMemoryStatsProvider.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

amount, committednonheapsize, countstatistic, countstatistic, countstatisticimpl, countstatisticimpl, description, description, java, managedattribute, managedattribute, management, maximum, statistics, usednonheapsize

The Glassfish JVMMemoryStatsProvider.java source code

/*
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 *
 * 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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package org.glassfish.admin.monitor.jvm;

import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import org.glassfish.external.statistics.CountStatistic;
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;

/* jvm.memory */
// v2 mbean: com.sun.appserv:name=memory,type=memory,category=monitor,server=server
// v3 mbean:
@AMXMetadata(type="memory-mon", group="monitoring")
@ManagedObject
@Description( "JVM Memory Statistics" )
public class JVMMemoryStatsProvider {
    private MemoryMXBean memBean = ManagementFactory.getMemoryMXBean();

    private CountStatisticImpl committedHeap = new CountStatisticImpl(
            "CommittedHeapSize", "bytes",
                "Amount of memory in bytes that is committed for the Java virtual machine to use" );
    private CountStatisticImpl initHeap = new CountStatisticImpl(
            "InitialHeapSize", "bytes",
                "Amount of memory in bytes that the Java virtual machine initially requests from the operating system for memory management" );
    private CountStatisticImpl maxHeap = new CountStatisticImpl(
            "MaxHeapSize", "bytes",
                "Maximum amount of memory in bytes that can be used for memory management" );
    private CountStatisticImpl usedHeap = new CountStatisticImpl(
            "UsedHeapSize", "bytes",
                "Amount of used memory in bytes" );
    private CountStatisticImpl committedNonHeap = new CountStatisticImpl(
            "CommittedNonHeapSize", "bytes",
                "Amount of memory in bytes that is committed for the Java virtual machine to use" );
    private CountStatisticImpl initNonHeap = new CountStatisticImpl(
            "InitialNonHeapSize", "bytes",
                "Amount of memory in bytes that the Java virtual machine initially requests from the operating system for memory management" );
    private CountStatisticImpl maxNonHeap = new CountStatisticImpl(
            "MaxNonHeapSize", "bytes",
                "Maximum amount of memory in bytes that can be used for memory management" );
    private CountStatisticImpl usedNonHeap = new CountStatisticImpl(
            "UsedNonHeapSize", "bytes",
                "Amount of used memory in bytes" );
    private CountStatisticImpl objectPendingFinalizationCount = new CountStatisticImpl(
            "ObjectsPendingFinalization", CountStatisticImpl.UNIT_COUNT,
                "Approximate number of objects for which finalization is pending" );

    @ManagedAttribute(id="committedheapsize-count")
    @Description( "amount of memory in bytes that is committed for the Java virtual machine to use" )
    public CountStatistic getCommittedHeap() {
        committedHeap.setCount(memBean.getHeapMemoryUsage().getCommitted());
        return committedHeap;
    }

    @ManagedAttribute(id="initheapsize-count")
    @Description( "amount of memory in bytes that the Java virtual machine initially requests from the operating system for memory management" )
    public CountStatistic getInitHeap() {
        initHeap.setCount(memBean.getHeapMemoryUsage().getInit());
        return initHeap;
    }

    @ManagedAttribute(id="maxheapsize-count")
    @Description( "maximum amount of memory in bytes that can be used for memory management" )
    public CountStatistic getMaxHeap() {
        maxHeap.setCount(memBean.getHeapMemoryUsage().getMax());
        return maxHeap;
    }

    @ManagedAttribute(id="usedheapsize-count")
    @Description( "amount of used memory in bytes" )
    public CountStatistic getUsedHeap() {
        usedHeap.setCount(memBean.getHeapMemoryUsage().getUsed());
        return usedHeap;
    }

    @ManagedAttribute(id="committednonheapsize-count")
    @Description( "amount of memory in bytes that is committed for the Java virtual machine to use" )
    public CountStatistic getCommittedNonHeap() {
        committedNonHeap.setCount(memBean.getNonHeapMemoryUsage().getCommitted());
        return committedNonHeap;
    }

    @ManagedAttribute(id="initnonheapsize-count")
    @Description( "amount of memory in bytes that the Java virtual machine initially requests from the operating system for memory management" )
    public CountStatistic getInitNonHeap() {
        initNonHeap.setCount(memBean.getNonHeapMemoryUsage().getInit());
        return initNonHeap;
    }

    @ManagedAttribute(id="maxnonheapsize-count")
    @Description( "maximum amount of memory in bytes that can be used for memory management" )
    public CountStatistic getMaxNonHeap() {
        maxNonHeap.setCount(memBean.getNonHeapMemoryUsage().getMax());
        return maxNonHeap;
    }

    @ManagedAttribute(id="usednonheapsize-count")
    @Description( "amount of used memory in bytes" )
    public CountStatistic getUsedNonHeap() {
        usedNonHeap.setCount(memBean.getNonHeapMemoryUsage().getUsed());
        return usedNonHeap;
    }

    @ManagedAttribute(id="objectpendingfinalizationcount-count")
    @Description( "approximate number of objects for which finalization is pending" )
    public CountStatistic getObjectPendingFinalizationCount() {
        objectPendingFinalizationCount.setCount(memBean.getObjectPendingFinalizationCount());
        return objectPendingFinalizationCount;
    }
}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish JVMMemoryStatsProvider.java source code file:

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