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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.simple;
26  
27  import java.util.concurrent.ConcurrentHashMap;
28  import java.util.concurrent.ConcurrentMap;
29  
30  import org.slf4j.Logger;
31  import org.slf4j.ILoggerFactory;
32  
33  /**
34   * An implementation of {@link ILoggerFactory} which always returns
35   * {@link SimpleLogger} instances.
36   * 
37   * @author Ceki Gülcü
38   */
39  public class SimpleLoggerFactory implements ILoggerFactory {
40  
41      ConcurrentMap<String, Logger> loggerMap;
42  
43      public SimpleLoggerFactory() {
44          loggerMap = new ConcurrentHashMap<>();
45          SimpleLogger.lazyInit();
46      }
47  
48      /**
49       * Return an appropriate {@link SimpleLogger} instance by name.
50       *
51       * This method will call {@link #createLogger(String)} if the logger
52       * has not been created yet.
53       */
54      public Logger getLogger(String name) {
55          return loggerMap.computeIfAbsent(name, this::createLogger);
56      }
57  
58      /**
59       * Actually creates the logger for the given name.
60       */
61      protected Logger createLogger(String name) {
62          return new SimpleLogger(name);
63      }
64  
65      /**
66       * Clear the internal logger cache.
67       *
68       * This method is intended to be called by classes (in the same package or
69       * subclasses) for testing purposes. This method is internal. It can be
70       * modified, renamed or removed at any time without notice.
71       *
72       * You are strongly discouraged from calling this method in production code.
73       */
74      protected void reset() {
75          loggerMap.clear();
76      }
77  }