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Java > Open Source Codes > org > exolab > jms > server > EmbeddedNameService


1 /**
2  * Redistribution and use of this software and associated documentation
3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
5  *
6  * 1. Redistributions of source code must retain copyright
7  * statements and notices. Redistributions must also contain a
8  * copy of this document.
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10  * 2. Redistributions in binary form must reproduce the
11  * above copyright notice, this list of conditions and the
12  * following disclaimer in the documentation and/or other
13  * materials provided with the distribution.
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15  * 3. The name "Exolab" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of Exoffice Technologies. For written permission,
18  * please contact info@exolab.org.
19  *
20  * 4. Products derived from this Software may not be called "Exolab"
21  * nor may "Exolab" appear in their names without prior written
22  * permission of Exoffice Technologies. Exolab is a registered
23  * trademark of Exoffice Technologies.
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25  * 5. Due credit should be given to the Exolab Project
26  * (http://www.exolab.org/).
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28  * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39  * OF THE POSSIBILITY OF SUCH DAMAGE.
40  *
41  * Copyright 2002-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: EmbeddedNameService.java,v 1.1 2004/11/26 01:51:00 tanderson Exp $
44  */

45 package org.exolab.jms.server;
46
47 import java.util.Hashtable JavaDoc;
48
49 import javax.naming.Context JavaDoc;
50 import javax.naming.CommunicationException JavaDoc;
51 import javax.naming.Name JavaDoc;
52 import javax.naming.NameParser JavaDoc;
53 import javax.naming.NamingException JavaDoc;
54
55 import org.codehaus.spice.jndikit.DefaultNameParser;
56 import org.codehaus.spice.jndikit.Namespace;
57 import org.codehaus.spice.jndikit.NamingProvider;
58 import org.codehaus.spice.jndikit.RemoteContext;
59 import org.codehaus.spice.jndikit.StandardNamespace;
60 import org.codehaus.spice.jndikit.memory.MemoryContext;
61 import org.codehaus.spice.jndikit.rmi.server.RMINamingProviderImpl;
62
63 public class EmbeddedNameService {
64
65     /**
66      * The root context
67      */

68     private Context JavaDoc _root;
69
70     /**
71      * The naming provider
72      */

73     private NamingProvider _provider;
74
75     /**
76      * The singleton instance
77      */

78     private static EmbeddedNameService _instance = new EmbeddedNameService();
79
80
81     /**
82      * Construct an <code>EmbeddedNameService</code>
83      */

84     private EmbeddedNameService() {
85         DefaultNameParser parser = new DefaultNameParser();
86         Namespace namespace = createNamespace(parser);
87         Context JavaDoc context = new MemoryContext(namespace, null, null);
88         _provider = new RMINamingProviderImpl(context);
89     }
90
91     /**
92      * Returns the singleton instance of the embedded name service
93      *
94      * @return the singleton instance of the embedded name service
95      */

96     public static EmbeddedNameService getInstance() {
97         return _instance;
98     }
99
100     /**
101      * Returns the initial context for beginning name resolution
102      *
103      * @return the initial context
104      * @throws NamingException for any naming error
105      */

106     public Context JavaDoc getInitialContext() throws NamingException JavaDoc {
107         Hashtable JavaDoc environment = new Hashtable JavaDoc();
108         Namespace namespace;
109         try {
110             namespace = createNamespace(_provider.getNameParser());
111         } catch (NamingException JavaDoc exception) {
112             throw exception;
113         } catch (Exception JavaDoc exception) {
114             throw new CommunicationException JavaDoc(exception.toString());
115         }
116
117         environment.put(RemoteContext.NAMING_PROVIDER, _provider);
118         environment.put(RemoteContext.NAMESPACE, namespace);
119
120         final Name JavaDoc baseName = namespace.getNameParser().parse("");
121         return new RemoteContext(environment, baseName);
122     }
123
124     /**
125      * Returns the naming provider
126      *
127      * @return the naming provider
128      */

129     public NamingProvider getNamingProvider() {
130         return _provider;
131     }
132
133     /**
134      * Creates a new namespace
135      *
136      * @param parser the parser to use
137      * @return a new namespace
138     */

139     private Namespace createNamespace(NameParser JavaDoc parser) {
140         return new StandardNamespace(parser);
141     }
142 }
143
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