1   /* 
2    * Copyright (c) 2004-2005 SLF4J.ORG
3    * Copyright (c) 2004-2005 QOS.ch
4    *
5    * All rights reserved.
6    * 
7    * Permission is hereby granted, free of charge, to any person obtaining
8    * a copy of this software and associated documentation files (the
9    * "Software"), to  deal in  the Software without  restriction, including
10   * without limitation  the rights to  use, copy, modify,  merge, publish,
11   * distribute, and/or sell copies of  the Software, and to permit persons
12   * to whom  the Software is furnished  to do so, provided  that the above
13   * copyright notice(s) and this permission notice appear in all copies of
14   * the  Software and  that both  the above  copyright notice(s)  and this
15   * permission notice appear in supporting documentation.
16   * 
17   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
18   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
19   * MERCHANTABILITY, FITNESS FOR  A PARTICULAR PURPOSE AND NONINFRINGEMENT
20   * OF  THIRD PARTY  RIGHTS. IN  NO EVENT  SHALL THE  COPYRIGHT  HOLDER OR
21   * HOLDERS  INCLUDED IN  THIS  NOTICE BE  LIABLE  FOR ANY  CLAIM, OR  ANY
22   * SPECIAL INDIRECT  OR CONSEQUENTIAL DAMAGES, OR  ANY DAMAGES WHATSOEVER
23   * RESULTING FROM LOSS  OF USE, DATA OR PROFITS, WHETHER  IN AN ACTION OF
24   * CONTRACT, NEGLIGENCE  OR OTHER TORTIOUS  ACTION, ARISING OUT OF  OR IN
25   * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26   * 
27   * Except as  contained in  this notice, the  name of a  copyright holder
28   * shall not be used in advertising or otherwise to promote the sale, use
29   * or other dealings in this Software without prior written authorization
30   * of the copyright holder.
31   *
32   */
33  
34  package org.slf4j.impl;
35  
36  import java.util.HashMap;
37  import java.util.Map;
38  
39  import org.apache.commons.logging.LogFactory;
40  import org.slf4j.ILoggerFactory;
41  import org.slf4j.Logger;
42  
43  /**
44   * JCLLoggerFactory is an implementation of {@link ILoggerFactory} returning the
45   * appropriately named {@link JCLLoggerAdapter} instance.
46   * 
47   * @author Ceki Gülcü
48   */
49  public class JCLLoggerFactory implements ILoggerFactory {
50  
51    // key: name (String), value: a JCLLoggerAdapter;
52    Map loggerMap;
53  
54    public JCLLoggerFactory() {
55      loggerMap = new HashMap();
56    }
57  
58    /*
59     * (non-Javadoc)
60     * 
61     * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
62     */
63    public Logger getLogger(String name) {
64      Logger logger = null;
65      // protect against concurrent access of loggerMap
66      synchronized (this) {
67        logger = (Logger) loggerMap.get(name);
68        if (logger == null) {
69          org.apache.commons.logging.Log jclLogger = LogFactory.getLog(name);
70          logger = new JCLLoggerAdapter(jclLogger, name);
71          loggerMap.put(name, logger);
72        }
73      }
74      return logger;
75    }
76  }