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.Iterator;
29 import java.util.Map;
30
31 import org.apache.log4j.MDCFriend;
32 import org.slf4j.spi.MDCAdapter;
33
34 public class Log4jMDCAdapter implements MDCAdapter {
35
36 static {
37 if (VersionUtil.getJavaMajorVersion() >= 9) {
38 MDCFriend.fixForJava9();
39 }
40 }
41
42 public void clear() {
43 @SuppressWarnings("rawtypes")
44 Map map = org.apache.log4j.MDC.getContext();
45 if (map != null) {
46 map.clear();
47 }
48 }
49
50 public String get(String key) {
51 return (String) org.apache.log4j.MDC.get(key);
52 }
53
54 /**
55 * Put a context value (the <code>val</code> parameter) as identified with
56 * the <code>key</code> parameter into the current thread's context map. The
57 * <code>key</code> parameter cannot be null. Log4j does <em>not</em>
58 * support null for the <code>val</code> parameter.
59 *
60 * <p>
61 * This method delegates all work to log4j's MDC.
62 *
63 * @throws IllegalArgumentException
64 * in case the "key" or <b>"val"</b> parameter is null
65 */
66 public void put(String key, String val) {
67 org.apache.log4j.MDC.put(key, val);
68 }
69
70 public void remove(String key) {
71 org.apache.log4j.MDC.remove(key);
72 }
73
74 @SuppressWarnings({ "rawtypes", "unchecked" })
75 public Map getCopyOfContextMap() {
76 Map old = org.apache.log4j.MDC.getContext();
77 if (old != null) {
78 return new HashMap(old);
79 } else {
80 return null;
81 }
82 }
83
84 @SuppressWarnings({ "rawtypes", "unchecked" })
85 public void setContextMap(Map contextMap) {
86 Map old = org.apache.log4j.MDC.getContext();
87 if (old == null) {
88 Iterator entrySetIterator = contextMap.entrySet().iterator();
89 while (entrySetIterator.hasNext()) {
90 Map.Entry mapEntry = (Map.Entry) entrySetIterator.next();
91 org.apache.log4j.MDC.put((String) mapEntry.getKey(), mapEntry.getValue());
92 }
93 } else {
94 old.clear();
95 old.putAll(contextMap);
96 }
97 }
98 }