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.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<String, Logger>();
45 SimpleLogger.lazyInit();
46 }
47
48 /**
49 * Return an appropriate {@link SimpleLogger} instance by name.
50 */
51 public Logger getLogger(String name) {
52 Logger simpleLogger = loggerMap.get(name);
53 if (simpleLogger != null) {
54 return simpleLogger;
55 } else {
56 Logger newInstance = new SimpleLogger(name);
57 Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
58 return oldInstance == null ? newInstance : oldInstance;
59 }
60 }
61
62 /**
63 * Clear the internal logger cache.
64 *
65 * This method is intended to be called by classes (in the same package) for
66 * testing purposes. This method is internal. It can be modified, renamed or
67 * removed at any time without notice.
68 *
69 * You are strongly discouraged from calling this method in production code.
70 */
71 void reset() {
72 loggerMap.clear();
73 }
74 }