Glassfish example source code file (AMXJ2EEStartupService.java)

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Java - Glassfish tags/keywords

bean, error, inject, inject, j2eedomain, javabean, jmexception, log, logging, management, metadataimpl, objectname, objectname, objectnamebuilder, propertychangehandler, server, server, string, string, util

The Glassfish AMXJ2EEStartupService.java source code

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 *
 * Copyright (c) 2006-2010 Oracle and/or its affiliates. All rights reserved.
 *
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 * 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.
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 * 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:
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package org.glassfish.admin.amx.impl.j2ee.loader;

import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.Servers;
import com.sun.logging.LogDomains;
import org.glassfish.admin.amx.base.DomainRoot;
import org.glassfish.admin.amx.config.AMXConfigConstants;
import org.glassfish.admin.amx.core.Util;
import org.glassfish.admin.amx.core.proxy.ProxyFactory;
import org.glassfish.admin.amx.impl.j2ee.DASJ2EEServerImpl;
import org.glassfish.admin.amx.impl.j2ee.J2EEDomainImpl;
import org.glassfish.admin.amx.impl.j2ee.Metadata;
import org.glassfish.admin.amx.impl.j2ee.MetadataImpl;
import org.glassfish.admin.amx.impl.util.ImplUtil;
import org.glassfish.admin.amx.impl.util.InjectedValues;
import org.glassfish.admin.amx.impl.util.ObjectNameBuilder;
import org.glassfish.admin.amx.intf.config.Domain;
import org.glassfish.admin.amx.j2ee.J2EEDomain;
import org.glassfish.admin.amx.j2ee.J2EETypes;
import org.glassfish.admin.amx.util.FeatureAvailability;
import org.glassfish.internal.data.ApplicationRegistry;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.Habitat;
import org.jvnet.hk2.config.*;

import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import java.beans.PropertyChangeEvent;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Logger;


/**
 * Startup service that loads support for AMX config MBeans.  How this is to be
 * triggered is not yet clear.
 */
@Service
public final class AMXJ2EEStartupService
        implements org.jvnet.hk2.component.PostConstruct,
        org.jvnet.hk2.component.PreDestroy,
        AMXJ2EEStartupServiceMBean, ConfigListener {

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

    @Inject
    private MBeanServer mMBeanServer;

    @Inject
    InjectedValues mCore;

    @Inject
    private com.sun.enterprise.config.serverbeans.Domain domain;

    private static final Logger logger =
            LogDomains.getLogger(AMXJ2EEStartupService.class, LogDomains.AMX_LOGGER);

    public InjectedValues getCore() {
        return mCore;
    }

    @Inject
    Habitat mHabitat;

    @Inject
    private ApplicationRegistry mAppsRegistry;

    public ApplicationRegistry getApplicationRegistry() {
        return mAppsRegistry;
    }


    public AMXJ2EEStartupService() {
        //debug( "AMXStartupService.AMXStartupService()" );
    }

    public void postConstruct() {
        try {
            /*
                    final StandardMBean mbean = new StandardMBean(this, AMXJ2EEStartupServiceMBean.class);
                    mMBeanServer.registerMBean( mbean, OBJECT_NAME );
                    */
            mMBeanServer.registerMBean(this, OBJECT_NAME);

            addListenerToServer();
        }
        catch (JMException e) {
            throw new Error(e);
        }
        //debug( "AMXJ2EEStartupService.postConstruct(): registered: " + OBJECT_NAME);
    }

    private void addListenerToServer() {
        Servers servers = domain.getServers();
        ObservableBean bean = (ObservableBean) ConfigSupport.getImpl((ConfigBeanProxy) servers);
        bean.addListener(this);
    }

    @Override
    public UnprocessedChangeEvents changed(PropertyChangeEvent[] propertyChangeEvents) {       
        return ConfigSupport.sortAndDispatch(propertyChangeEvents, new PropertyChangeHandler(propertyChangeEvents), logger);
    }

    class PropertyChangeHandler implements Changed {

        PropertyChangeEvent[] events;

        private PropertyChangeHandler(PropertyChangeEvent[] events) {
            this.events = events;
        }

        /**
         * Notification of a change on a configuration object
         *
         * @param type            type of change : ADD mean the changedInstance was added to the parent
         *                        REMOVE means the changedInstance was removed from the parent, CHANGE means the
         *                        changedInstance has mutated.
         * @param changedType     type of the configuration object
         * @param changedInstance changed instance.
         */
        public <T extends ConfigBeanProxy> NotProcessed changed(TYPE type, Class changedType, T changedInstance) {
            switch (type) {
                case ADD:
                    if (changedInstance instanceof Server) {
                        Server server = (Server) changedInstance;
                        String serverName = server.getName();

                        DomainRoot domainRootProxy = ProxyFactory.getInstance(mMBeanServer).getDomainRootProxy(false);

                        MetadataImpl meta = new MetadataImpl();
                        meta.setCorrespondingConfig(domainRootProxy.getDomain().as(Domain.class).getServers().getServer().get(serverName).objectName());
                        final DASJ2EEServerImpl impl = new DASJ2EEServerImpl(getJ2EEDomain(), meta);
                        ObjectName serverObjectName = new ObjectNameBuilder(mMBeanServer, getJ2EEDomain()).buildChildObjectName(J2EETypes.J2EE_SERVER, serverName);
                        try {
                            serverObjectName = mMBeanServer.registerMBean(impl, serverObjectName).getObjectName();
                        }
                        catch (JMException e) {
                            throw new Error(e);
                        }
                    }
                    break;

                case REMOVE:
                    if (changedInstance instanceof Server) {
                        Server server = (Server) changedInstance;
                        String serverName = server.getName();

                        ObjectName serverObjectName = new ObjectNameBuilder(mMBeanServer, getJ2EEDomain()).buildChildObjectName(J2EETypes.J2EE_SERVER, serverName);

                        try {
                            Set serverSet = mMBeanServer.queryNames(new ObjectName(serverObjectName.toString() + ",*"), null);
                            Iterator it = serverSet.iterator();
                            while (it.hasNext()) {
                                ObjectName element = (ObjectName) it.next();
                                mMBeanServer.unregisterMBean(element);
                            }
                        }
                        catch (JMException e) {
                            throw new Error(e);
                        }
                    }
                    break;

                default:
                    break;
            }
            return null;
        }
    }

    public void preDestroy() {
        //ImplUtil.getLogger().info( "AMXConfigStartupService.preDestroy(): stopping AMX" );
        unloadAMXMBeans();
    }

    private DomainRoot getDomainRootProxy() {
        return ProxyFactory.getInstance(mMBeanServer).getDomainRootProxy();
    }

    public ObjectName
    getJ2EEDomain() {
        return getDomainRootProxy().child(J2EETypes.J2EE_DOMAIN).extra().objectName();
    }

    private J2EEDomain
    getJ2EEDomainProxy() {
        return ProxyFactory.getInstance(mMBeanServer).getProxy(getJ2EEDomain(), J2EEDomain.class);
    }

    public synchronized ObjectName
    loadAMXMBeans() {
        FeatureAvailability.getInstance().waitForFeature(FeatureAvailability.AMX_CORE_READY_FEATURE, "" + this);
        FeatureAvailability.getInstance().waitForFeature(AMXConfigConstants.AMX_CONFIG_READY_FEATURE, "" + this);

        final DomainRoot domainRootProxy = ProxyFactory.getInstance(mMBeanServer).getDomainRootProxy(false);
        final ObjectName domainRoot = domainRootProxy.objectName();
        final ObjectNameBuilder objectNames = new ObjectNameBuilder(mMBeanServer, domainRoot);
        final String domainName = Util.getNameProp(domainRoot);

        final Metadata metadata = new MetadataImpl();
        metadata.add(Metadata.CORRESPONDING_CONFIG, domainRootProxy.child(Domain.class).objectName());

        String serverName = mHabitat.getComponent(Server.class).getName();

        final J2EEDomainImpl impl = new J2EEDomainImpl(domainRoot, metadata);
        impl.setServerName(serverName);
        ObjectName objectName = objectNames.buildChildObjectName(J2EEDomain.class);
        try {
            objectName = mMBeanServer.registerMBean(impl, objectName).getObjectName();
        }
        catch (JMException e) {
            throw new Error(e);
        }

        ImplUtil.getLogger().info("J2EEDomain registered at " + objectName);
        return objectName;
    }

    public synchronized void unloadAMXMBeans() {
        final J2EEDomain j2eeDomain = getJ2EEDomainProxy();
        if (j2eeDomain != null) {
            ImplUtil.unregisterAMXMBeans(j2eeDomain);
        }
    }
}