Glassfish example source code file (BootAMX.java)

This example Glassfish source code file (BootAMX.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

amx, amxstartupservicembean, bootamx, bootamx, habitat, habitat, illegalstateexception, illegalstateexception, jmexception, management, mbeanserver, objectname, objectname, runtimeexception, standardmbean, util

The Glassfish BootAMX.java source code

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 * 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.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 *
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package org.glassfish.admin.mbeanserver;

import java.util.Set;
import java.util.List;
import java.util.ArrayList;

import org.jvnet.hk2.component.Habitat;

import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.StandardMBean;
import javax.management.ObjectName;
import javax.management.remote.JMXServiceURL;

import org.glassfish.external.amx.BootAMXMBean;
import org.glassfish.external.amx.AMXGlassfish;

/**
The MBean implementation for BootAMXMBean.

Public API is the name of the booter MBean eg {@link BootAMXMBean.OBJECT_NAME}
 */
final class BootAMX implements BootAMXMBean
{
    private final MBeanServer mMBeanServer;
    private final ObjectName mObjectName;
    private final Habitat mHabitat;
    private ObjectName mDomainRootObjectName;


    private static void debug(final String s)
    {
        System.out.println(s);
    }


    private BootAMX(
        final Habitat habitat,
        final MBeanServer mbeanServer)
    {
        mHabitat = habitat;
        mMBeanServer = mbeanServer;
        mObjectName = getBootAMXMBeanObjectName();
        mDomainRootObjectName = null;

        if (mMBeanServer.isRegistered(mObjectName))
        {
            throw new IllegalStateException("AMX Booter MBean is already registered: " + mObjectName);
        }
    }

    public static ObjectName getBootAMXMBeanObjectName()
    {
        return AMXGlassfish.DEFAULT.getBootAMXMBeanObjectName();
    }
    

    /**
    Create an instance of the booter.
     */
    public static synchronized BootAMX create(final Habitat habitat, final MBeanServer server)
    {
        final BootAMX booter = new BootAMX(habitat, server);
        final ObjectName objectName = getBootAMXMBeanObjectName();

        try
        {
            final StandardMBean mbean = new StandardMBean(booter, BootAMXMBean.class);

            if (!server.registerMBean(mbean, objectName).getObjectName().equals(objectName))
            {
                throw new IllegalStateException();
            }
        }
        catch (JMException e)
        {
            e.printStackTrace();
            throw new IllegalStateException(e);
        }
        return booter;
    }


    AMXStartupServiceMBean getLoader()
    {
        try
        {
            return mHabitat.getByContract(AMXStartupServiceMBean.class);
        }
        catch (Throwable t)
        {
            t.printStackTrace();
            throw new RuntimeException(t);
        }
    }


    /**
    We need to dynamically load the AMX module.  HOW?  we can't depend on the amx-impl module.

    For now though, assume that a well-known MBean is available through other means via
    the amx-impl module.
     */
    public synchronized ObjectName bootAMX()
    {
        if (mDomainRootObjectName == null)
        {
            //debug( "Booter.bootAMX: getting AMXStartupServiceMBean via contract" );
            final AMXStartupServiceMBean loader = getLoader();

            //debug( "Got loader for AMXStartupServiceMBean: " + loader );

            final ObjectName startupON = AMXStartupServiceMBean.OBJECT_NAME;
            if (!mMBeanServer.isRegistered(startupON))
            {
                //debug("Booter.bootAMX(): AMX MBean not yet available: " + startupON);
                throw new IllegalStateException("AMX MBean not yet available: " + startupON);
            }

            try
            {
                //debug( "Booter.bootAMX: invoking loadAMXMBeans() on " + startupON);
                mDomainRootObjectName = (ObjectName) mMBeanServer.invoke(startupON, "loadAMXMBeans", null, null);
                //debug( "Booter.bootAMX: domainRoot = " + mDomainRootObjectName);
            }
            catch (final JMException e)
            {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }

        return mDomainRootObjectName;
    }


    /**
    Return the JMXServiceURLs for all connectors we've loaded.
     */
    public JMXServiceURL[] getJMXServiceURLs()
    {
        return JMXStartupService.getJMXServiceURLs(mMBeanServer);
    }
    
    public void shutdown() 
    {
        try
        {
            mMBeanServer.unregisterMBean(getBootAMXMBeanObjectName());
        }
        catch( final Exception e )
        {
            Util.getLogger().log( java.util.logging.Level.WARNING, "BootAMX.shutdown", e);
        }
   }
}