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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.helpers;
26  
27  import org.slf4j.ILoggerFactory;
28  import org.slf4j.Logger;
29  
30  import java.util.ArrayList;
31  import java.util.List;
32  import java.util.concurrent.ConcurrentHashMap;
33  import java.util.concurrent.ConcurrentMap;
34  
35  /**
36   * SubstituteLoggerFactory manages instances of {@link SubstituteLogger}.
37   *
38   * @author Ceki Gülcü
39   * @author Chetan Mehrotra
40   */
41  public class SubstituteLoggerFactory implements ILoggerFactory {
42  
43    final ConcurrentMap<String, SubstituteLogger> loggers = new ConcurrentHashMap<String, SubstituteLogger>();
44  
45    public Logger getLogger(String name) {
46      SubstituteLogger logger = loggers.get(name);
47      if (logger == null) {
48        logger = new SubstituteLogger(name);
49        SubstituteLogger oldLogger = loggers.putIfAbsent(name, logger);
50        if (oldLogger != null)
51          logger = oldLogger;
52      }
53      return logger;
54    }
55  
56    public List<String> getLoggerNames() {
57      return new ArrayList<String>(loggers.keySet());
58    }
59  
60    public List<SubstituteLogger> getLoggers() {
61      return new ArrayList<SubstituteLogger>(loggers.values());
62    }
63  
64    public void clear() {
65      loggers.clear();
66    }
67  }