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