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Java > Open Source Codes > org > apache > avalon > excalibur > naming > memory > MemoryInitialContextFactory


1 /*
2
3  ============================================================================
4                    The Apache Software License, Version 1.1
5  ============================================================================
6  
7  Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  
9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
11  
12  1. Redistributions of source code must retain the above copyright notice,
13     this list of conditions and the following disclaimer.
14  
15  2. Redistributions in binary form must reproduce the above copyright notice,
16     this list of conditions and the following disclaimer in the documentation
17     and/or other materials provided with the distribution.
18  
19  3. The end-user documentation included with the redistribution, if any, must
20     include the following acknowledgment: "This product includes software
21     developed by the Apache Software Foundation (http://www.apache.org/)."
22     Alternately, this acknowledgment may appear in the software itself, if
23     and wherever such third-party acknowledgments normally appear.
24  
25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
26     must not be used to endorse or promote products derived from this software
27     without prior written permission. For written permission, please contact
28     apache@apache.org.
29  
30  5. Products derived from this software may not be called "Apache", nor may
31     "Apache" appear in their name, without prior written permission of the
32     Apache Software Foundation.
33  
34  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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45  This software consists of voluntary contributions made by many individuals
46  on behalf of the Apache Software Foundation. For more information on the
47  Apache Software Foundation, please see <http://www.apache.org/>.
48  
49 */
50 package org.apache.avalon.excalibur.naming.memory;
51
52 import java.util.Hashtable JavaDoc;
53
54 import javax.naming.Context JavaDoc;
55 import javax.naming.NamingException JavaDoc;
56 import javax.naming.spi.InitialContextFactory JavaDoc;
57
58 import org.apache.avalon.excalibur.naming.DefaultNameParser;
59 import org.apache.avalon.excalibur.naming.DefaultNamespace;
60
61 /**
62  * Initial context factory for memorycontext.
63  *
64  * <p><b>WARNING:</b> This class should never be use used in a real
65  * system. It is is just a class that demonstrates how to write a
66  * basic <code>InitialContextFactory</code> for MemeoryContext.
67  * However this factory creates a new Context every time which is
68  * rarely desired behaviour.</p>
69  *
70  * <p>In a real application you may want the policy of Context
71  * creation to be specific application. Some strategies include.</p>
72  * <ul>
73  * <li>ClassLoader-wide. ie Every user who is in same ClassLoader
74  * or loaded from a Child ClassLoader will see same JNDI tree.
75  * In this case the InitialContextFactory should cache root
76  * context in a static variable.</li>
77  * <li>Thread-specific. ie Give out initial context based on which
78  * thread the caller is in. In this case the InitialContextFactory
79  * should cache root context in a [Inheritable]ThreadLocal
80  * variable.</li>
81  * <li>Parameter-specific. ie Give out initial context based on
82  * a parameter passed in. The parameter could be passed in as
83  * PROVIDER_URL or another standard context property. In this
84  * case the InitialContextFactory should cache root context(s)
85  * in a static map variable that maps between parameter and
86  * context.</li>
87  * </ul>
88  *
89  * @author <a HREF="mailto:peter@apache.org">Peter Donald</a>
90  * @version $Revision: 1.1 $
91  * @deprecated Toolkit deprecated and replaced by http://spice.sourceforge.net/jndikit/
92  */
93 public class MemoryInitialContextFactory
94     implements InitialContextFactory JavaDoc
95 {
96     public Context JavaDoc getInitialContext( final Hashtable JavaDoc environment )
97         throws NamingException JavaDoc
98     {
99         final DefaultNameParser parser = new DefaultNameParser();
100         final DefaultNamespace namespace = new DefaultNamespace( parser );
101         return new MemoryContext( namespace, environment, null );
102     }
103 }
104
105
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