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1 package org.jzonic.jlo;
2
3 import java.util.Map  ;
4 import java.util.HashMap ;
5 import java.util.Iterator ;
6
7
12 public class NDC {
13
14 private static final ThreadLocal resources = new ThreadLocal ();
15
16 private NDC() {
17 }
18
19 public static void put(String key,Object obj) {
20 Map map = (Map ) resources.get();
21 if (map == null) {
23 map = new HashMap ();
24 resources.set(map);
25 }
26 map.put(key,obj);
27 }
28
29 public static Object get(String key) {
30 Map map = (Map ) resources.get();
31 if (map == null) {
32 return null;
33 }
34 return map.get(key);
35 }
36
37 public void remove(String key) {
38 Map map = (Map ) resources.get();
39 if (map != null) {
40 if ( map.containsKey(key)) {
41 map.remove(key);
42 }
43 }
44 }
45
46 public static String getAsString() {
47 Map map = (Map ) resources.get();
48 if (map == null) {
49 return null;
50 }
51 StringBuffer buffer = new StringBuffer ();
52 buffer.append("[");
53 Iterator it = map.keySet().iterator();
54 while ( it.hasNext() ) {
55 String key = (String )it.next();
56 if ( buffer.length() > 1 ) {
57 buffer.append(",");
58 }
59 buffer.append(key);
60 buffer.append("=");
61 buffer.append(map.get(key).toString());
62 }
63 buffer.append("]");
64 return buffer.toString();
65 }
66
67 }
68 |
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Java API By Example, From Geeks To Geeks.