01: /*
02: * Copyright (c) 2004-2005 SLF4J.ORG
03: * Copyright (c) 2004-2005 QOS.ch
04: *
05: * All rights reserved.
06: *
07: * Permission is hereby granted, free of charge, to any person obtaining
08: * a copy of this software and associated documentation files (the
09: * "Software"), to deal in the Software without restriction, including
10: * without limitation the rights to use, copy, modify, merge, publish,
11: * distribute, and/or sell copies of the Software, and to permit persons
12: * to whom the Software is furnished to do so, provided that the above
13: * copyright notice(s) and this permission notice appear in all copies of
14: * the Software and that both the above copyright notice(s) and this
15: * permission notice appear in supporting documentation.
16: *
17: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
20: * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
21: * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
22: * SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
23: * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
24: * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
25: * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26: *
27: * Except as contained in this notice, the name of a copyright holder
28: * shall not be used in advertising or otherwise to promote the sale, use
29: * or other dealings in this Software without prior written authorization
30: * of the copyright holder.
31: *
32: */
33:
34: package org.slf4j.impl;
35:
36: import java.util.HashMap;
37: import java.util.Map;
38:
39: import org.apache.log4j.LogManager;
40: import org.slf4j.ILoggerFactory;
41: import org.slf4j.Logger;
42:
43: /**
44: * Log4jLoggerFactory is an implementation of {@link ILoggerFactory} returning
45: * the appropriate named {@link Log4jLoggerAdapter} instance.
46: *
47: * @author Ceki Gülcü
48: */
49: public class Log4jLoggerFactory implements ILoggerFactory {
50:
51: // key: name (String), value: a Log4jLoggerAdapter;
52: Map loggerMap;
53:
54: public Log4jLoggerFactory() {
55: loggerMap = new HashMap();
56: }
57:
58: /*
59: * (non-Javadoc)
60: *
61: * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
62: */
63: public Logger getLogger(String name) {
64: Logger slf4jLogger = null;
65: // protect against concurrent access of loggerMap
66: synchronized (this ) {
67: slf4jLogger = (Logger) loggerMap.get(name);
68: if (slf4jLogger == null) {
69: org.apache.log4j.Logger log4jLogger;
70: if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) {
71: log4jLogger = LogManager.getRootLogger();
72: } else {
73: log4jLogger = LogManager.getLogger(name);
74: }
75: slf4jLogger = new Log4jLoggerAdapter(log4jLogger);
76: loggerMap.put(name, slf4jLogger);
77: }
78: }
79: return slf4jLogger;
80: }
81: }
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