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1   /**
2    * This file Copyright (c) 2008-2011 Magnolia International
3    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
4    *
5    *
6    * This file is dual-licensed under both the Magnolia
7    * Network Agreement and the GNU General Public License.
8    * You may elect to use one or the other of these licenses.
9    *
10   * This file is distributed in the hope that it will be
11   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12   * implied warranty of MERCHANTABILITY or FITNESS FOR A
13   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14   * Redistribution, except as permitted by whichever of the GPL
15   * or MNA you select, is prohibited.
16   *
17   * 1. For the GPL license (GPL), you can redistribute and/or
18   * modify this file under the terms of the GNU General
19   * Public License, Version 3, as published by the Free Software
20   * Foundation.  You should have received a copy of the GNU
21   * General Public License, Version 3 along with this program;
22   * if not, write to the Free Software Foundation, Inc., 51
23   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24   *
25   * 2. For the Magnolia Network Agreement (MNA), this file
26   * and the accompanying materials are made available under the
27   * terms of the MNA which accompanies this distribution, and
28   * is available at http://www.magnolia-cms.com/mna.html
29   *
30   * Any modifications to this file must keep this entire header
31   * intact.
32   *
33   */
34  package info.magnolia.stats;
35  
36  import info.magnolia.cms.util.MBeanUtil;
37  
38  import org.slf4j.Logger;
39  import org.slf4j.LoggerFactory;
40  
41  
42  /**
43   * Collects and provides information about number of JCR sessions used by this instance of Magnolia.
44   *
45   * @author philipp
46   * @version $Id: JCRStats.java 41137 2011-01-06 18:19:25Z gjoseph $
47   *
48   */
49  public class JCRStats implements JCRStatsMBean {
50      /**
51       * Logger.
52       */
53      private static Logger log = LoggerFactory.getLogger(JCRStats.class);
54  
55      private static JCRStats instance = new JCRStats();
56  
57      private volatile int sessionCount;
58  
59      public JCRStats() {
60          MBeanUtil.registerMBean("JCRStats", this);
61      }
62  
63      public int getSessionCount() {
64          return sessionCount;
65      }
66  
67      public synchronized void incSessionCount(){sessionCount++;}
68  
69      public synchronized void decSessionCount(){sessionCount--;}
70  
71      /**
72       * @return the instance
73       */
74      public static JCRStats getInstance() {
75          return instance;
76      }
77  
78  }