1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.portal.kernel.management.jmx;
16  
17  import com.liferay.portal.kernel.bean.PortalBeanLocatorUtil;
18  import com.liferay.portal.kernel.management.ManageAction;
19  
20  import java.util.concurrent.atomic.AtomicReference;
21  
22  import javax.management.MBeanServer;
23  
24  /**
25   * <a href="BaseJMXManageAction.java.html"><b><i>View Source</i></b></a>
26   *
27   * @author Shuyang Zhou
28   */
29  public abstract class BaseJMXManageAction<T> implements ManageAction<T> {
30  
31      protected MBeanServer getMBeanServer() {
32          MBeanServer mBeanServer = _mBeanServerReference.get();
33  
34          if (mBeanServer == null) {
35              mBeanServer = (MBeanServer)PortalBeanLocatorUtil.locate(
36                  "mBeanServer");
37  
38              _mBeanServerReference.compareAndSet(null, mBeanServer);
39          }
40  
41          return mBeanServer;
42      }
43  
44      private static AtomicReference<MBeanServer> _mBeanServerReference =
45          new AtomicReference<MBeanServer>();
46  
47  }