001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.management.jmx;
016    
017    import com.liferay.portal.kernel.bean.PortalBeanLocatorUtil;
018    import com.liferay.portal.kernel.management.ManageAction;
019    
020    import java.util.concurrent.atomic.AtomicReference;
021    
022    import javax.management.MBeanServer;
023    
024    /**
025     * @author Shuyang Zhou
026     */
027    public abstract class BaseJMXManageAction<T> implements ManageAction<T> {
028    
029            protected MBeanServer getMBeanServer() {
030                    MBeanServer mBeanServer = _mBeanServerReference.get();
031    
032                    if (mBeanServer == null) {
033                            mBeanServer = (MBeanServer)PortalBeanLocatorUtil.locate(
034                                    "mBeanServer");
035    
036                            _mBeanServerReference.compareAndSet(null, mBeanServer);
037                    }
038    
039                    return mBeanServer;
040            }
041    
042            private static AtomicReference<MBeanServer> _mBeanServerReference =
043                    new AtomicReference<MBeanServer>();
044    
045    }