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.jul;
26
27 import org.slf4j.Logger;
28 import org.slf4j.ILoggerFactory;
29
30 import java.util.concurrent.ConcurrentHashMap;
31 import java.util.concurrent.ConcurrentMap;
32
33 /**
34 * JDK14LoggerFactory is an implementation of {@link ILoggerFactory} returning
35 * the appropriately named {@link JDK14LoggerAdapter} instance.
36 *
37 * @author Ceki Gülcü
38 */
39 public class JDK14LoggerFactory implements ILoggerFactory {
40
41 // key: name (String), value: a JDK14LoggerAdapter;
42 ConcurrentMap<String, Logger> loggerMap;
43
44 /**
45 * the root logger is called "" in JUL
46 */
47 private static String JUL_ROOT_LOGGER_NAME = "";
48
49 public JDK14LoggerFactory() {
50 loggerMap = new ConcurrentHashMap<>();
51 // ensure jul initialization. see SLF4J-359
52 // note that call to java.util.logging.LogManager.getLogManager() fails on the Google App Engine platform. See
53 // SLF4J-363
54 java.util.logging.Logger.getLogger("");
55 }
56
57 /*
58 * (non-Javadoc)
59 *
60 * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
61 */
62 public Logger getLogger(String name) {
63 // the root logger is called "" in JUL
64 if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) {
65 name = JUL_ROOT_LOGGER_NAME;
66 }
67
68 Logger slf4jLogger = loggerMap.get(name);
69 if (slf4jLogger != null)
70 return slf4jLogger;
71 else {
72 java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(name);
73 Logger newInstance = new JDK14LoggerAdapter(julLogger);
74 Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
75 return oldInstance == null ? newInstance : oldInstance;
76 }
77 }
78 }