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 java.util.HashMap;
28 import java.util.Map;
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 final static SimpleLoggerFactory INSTANCE = new SimpleLoggerFactory();
42
43 Map loggerMap;
44
45 public SimpleLoggerFactory() {
46 loggerMap = new HashMap();
47 }
48
49 /**
50 * Return an appropriate {@link SimpleLogger} instance by name.
51 */
52 public Logger getLogger(String name) {
53 Logger slogger = null;
54 // protect against concurrent access of the loggerMap
55 synchronized (this) {
56 slogger = (Logger) loggerMap.get(name);
57 if (slogger == null) {
58 slogger = new SimpleLogger(name);
59 loggerMap.put(name, slogger);
60 }
61 }
62 return slogger;
63 }
64
65 /**
66 * Clear the internal logger cache.
67 *
68 * This method is intended to be called by classes (in the same package) for
69 * testing purposes. This method is internal. It can be modified, renamed or
70 * removed at any time without notice.
71 *
72 * You are strongly discouraged from calling this method in production code.
73 */
74 void reset() {
75 loggerMap.clear();
76 }
77 }