JVMOSStatsProvider.java

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package org.glassfish.admin.monitor.jvm;

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.external.statistics.StringStatistic;
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;

/* jvm.operating-system */
// v2 mbean: com.sun.appserv:name=operating-system,type=operating-system,category=monitor,server=server
// v3 mbean: 
@AMXMetadata(type="operating-system-mon", group="monitoring")
@ManagedObject
@Description( "JVM Operating System Statistics" )
public class JVMOSStatsProvider {

    private OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();

    private StringStatisticImpl arch = new StringStatisticImpl("Architecture", "String",
                "Operating system architecture" );
    private CountStatisticImpl availableProcessors = new CountStatisticImpl(
            "AvailableProcessors", CountStatisticImpl.UNIT_COUNT,
                "Number of processors available to the Java virtual machine" );
    private StringStatisticImpl osName = new StringStatisticImpl("Name", "String",
                "Operating system name" );
    private StringStatisticImpl osVersion = new StringStatisticImpl("Version", "String",
                "operating system version" );
    //private CountStatisticImpl sysLoadAverage = new CountStatisticImpl(
    //        "SystemLoadAverage", CountStatisticImpl.UNIT_COUNT,
    //            "System load average for the last minute" );

    @ManagedAttribute(id="arch-current")
    @Description( "operating system architecture" )
    public StringStatistic getArch() {
        arch.setCurrent(osBean.getArch());
        return arch;
    }

    @ManagedAttribute(id="availableprocessors-count")
    @Description( "number of processors available to the Java virtual machine" )
    public CountStatistic getAvailableProcessors() {
        availableProcessors.setCount(osBean.getAvailableProcessors());
        return availableProcessors;
    }

    @ManagedAttribute(id="name-current")
    @Description( "operating system name" )
    public StringStatistic getOSName() {
        osName.setCurrent(osBean.getName());
        return osName;
    }

    @ManagedAttribute(id="version-current")
    @Description( "operating system version" )
    public StringStatistic getOSVersion() {
        osVersion.setCurrent(osBean.getVersion());
        return osVersion;
    }

    /*@ManagedAttribute(id="systemloadaverage-current")
    @Description( "system load average for the last minute" )
    public CountStatistic getSystemLoadAverage() {
        sysLoadAverage.setCurrent(osBean.getSystemLoadAverage());
        return sysLoadAverage;
    }*/
}