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1 package com.tonbeller.tbutils.res;
2
3 import java.util.Collection  ;
4 import java.util.Collections ;
5
6 import javax.naming.Context ;
7 import javax.naming.InitialContext ;
8 import javax.naming.NameNotFoundException ;
9 import javax.naming.NamingException ;
10 import javax.naming.NoInitialContextException ;
11
12 import org.apache.log4j.Logger;
13
16
17 public class JNDIResourceProvider implements ResourceProvider {
18 Context context = null;
19 boolean disabled = false;
20 private static Logger logger = Logger.getLogger(JNDIResourceProvider.class);
21 public static final String JNDI_NULL = "jndi.null";
22
23 public String getString(String key) {
24 if (disabled)
25 return null;
26 try {
27 if (context == null) {
28 Context initCtx = new InitialContext ();
29 context = (Context ) initCtx.lookup("java:comp/env");
30 }
31 Object obj = context.lookup(key);
32 if (obj == null) {
33 if (logger.isInfoEnabled())
34 logger.info("key is null: " + key);
35 return null;
36 }
37 String str = obj.toString();
38
39 if (JNDI_NULL.equals(str)) {
41 if (logger.isInfoEnabled())
42 logger.info("key is jndi.null: " + key);
43 return null;
44 }
45
46 return str;
47 } catch (NameNotFoundException e) {
48 if (logger.isInfoEnabled())
49 logger.info("key not found: " + key);
50 return null;
51 } catch (NoInitialContextException e) {
52 logger.warn("JNDI Context not found, assuming test environment");
53 disabled = true;
54 return null;
55 } catch (NamingException e) {
56 logger.error(key, e);
57 return null;
58 }
59 }
60
61 public Collection keySet() {
62 return Collections.EMPTY_SET;
63 }
64
65 public void close() {
66 try {
67 if (context != null)
68 context.close();
69 } catch (NamingException e) {
70 logger.error("error closing context", e);
71 } finally {
72 context = null;
73 }
74 }
75
76 public void dump(Dumper d) {
77 d.dump(this);
78 }
79
80 public String getName() {
81 return "JNDI Lookup " + (disabled ? "disabled" : "enabled");
82 }
83
84 }
85 |
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