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.Deque;
28 import java.util.Map;
29
30 import org.slf4j.spi.MDCAdapter;
31
32 /**
33 * This adapter is an empty implementation of the {@link MDCAdapter} interface.
34 * It is used for all logging systems which do not support mapped
35 * diagnostic contexts such as JDK14, simple and NOP.
36 *
37 * @author Ceki Gülcü
38 *
39 * @since 1.4.1
40 */
41 public class NOPMDCAdapter implements MDCAdapter {
42
43 public void clear() {
44 }
45
46 public String get(String key) {
47 return null;
48 }
49
50 public void put(String key, String val) {
51 }
52
53 public void remove(String key) {
54 }
55
56 public Map<String, String> getCopyOfContextMap() {
57 return null;
58 }
59
60 public void setContextMap(Map<String, String> contextMap) {
61 // NOP
62 }
63
64 @Override
65 public void pushByKey(String key, String value) {
66 }
67
68 @Override
69 public String popByKey(String key) {
70 return null;
71 }
72
73 @Override
74 public Deque<String> getCopyOfDequeByKey(String key) {
75 return null;
76 }
77
78 public void clearDequeByKey(String key) {
79 }
80
81 }