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 java.util.ArrayList;
28 import java.util.List;
29
30 import org.slf4j.ILoggerFactory;
31 import org.slf4j.Logger;
32
33 /**
34 * SubstituteLoggerFactory is an trivial implementation of
35 * {@link ILoggerFactory} which always returns the unique instance of NOPLogger.
36 *
37 * <p>
38 * It used as a temporary substitute for the real ILoggerFactory during its
39 * auto-configuration which may re-enter LoggerFactory to obtain logger
40 * instances. See also http://bugzilla.slf4j.org/show_bug.cgi?id=106
41 *
42 * @author Ceki Gülcü
43 */
44 public class SubstituteLoggerFactory implements ILoggerFactory {
45
46 // keep a record of requested logger names
47 final List loggerNameList = new ArrayList();
48
49 public Logger getLogger(String name) {
50 synchronized (loggerNameList) {
51 loggerNameList.add(name);
52 }
53 return NOPLogger.NOP_LOGGER;
54 }
55
56 public List getLoggerNameList() {
57 List copy = new ArrayList();
58 synchronized (loggerNameList) {
59 copy.addAll(loggerNameList);
60 }
61 return copy;
62 }
63
64 }