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1   /**
2    * Copyright (c) 2004-2011 QOS.ch
3    * All rights reserved.
4    *
5    * Permission is hereby granted, free  of charge, to any person obtaining
6    * a  copy  of this  software  and  associated  documentation files  (the
7    * "Software"), to  deal in  the Software without  restriction, including
8    * without limitation  the rights to  use, copy, modify,  merge, publish,
9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10   * permit persons to whom the Software  is furnished to do so, subject to
11   * the following conditions:
12   *
13   * The  above  copyright  notice  and  this permission  notice  shall  be
14   * included in all copies or substantial portions of the Software.
15   *
16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   *
24   */
25  package org.slf4j.impl;
26  
27  import org.slf4j.Logger;
28  import org.slf4j.ILoggerFactory;
29  
30  import java.util.concurrent.ConcurrentHashMap;
31  import java.util.concurrent.ConcurrentMap;
32  
33  /**
34   * JDK14LoggerFactory is an implementation of {@link ILoggerFactory} returning
35   * the appropriately named {@link JDK14LoggerAdapter} instance.
36   * 
37   * @author Ceki Gülcü
38   */
39  public class JDK14LoggerFactory implements ILoggerFactory {
40  
41    // key: name (String), value: a JDK14LoggerAdapter;
42    ConcurrentMap<String, Logger> loggerMap;
43  
44    public JDK14LoggerFactory() {
45      loggerMap =new ConcurrentHashMap<String, Logger>();
46    }
47  
48    /*
49     * (non-Javadoc)
50     * 
51     * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
52     */
53    public synchronized Logger getLogger(String name) {
54      // the root logger is called "" in JUL
55      if(name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) {
56        name = "";
57      }
58  
59      Logger slf4jLogger = loggerMap.get(name);
60      if (slf4jLogger != null)
61        return slf4jLogger;
62      else {
63        java.util.logging.Logger julLogger = java.util.logging.Logger
64            .getLogger(name);
65        Logger newInstance = new JDK14LoggerAdapter(julLogger);
66        Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
67        return oldInstance == null ? newInstance : oldInstance;
68      }
69    }
70  }