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.
9 *
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.
14 *
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.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
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 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: ContextInvocationHandler.java,v 1.4 2005/12/01 13:44:38 tanderson Exp $
44 */
45 package org.exolab.jms.net.connector;
46
47 import org.exolab.jms.net.proxy.Proxy;
48
49
50 /***
51 * <code>InvocationHandler</code> implementation that sets the current {@link
52 * ConnectionContext}. before delegating invocations.<br/>
53 * This ensures {@link Proxy} instances are associated with the appropriate
54 * {@link Connection} and {@link ConnectionFactory} on deserialization.
55 *
56 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
57 * @version $Revision: 1.4 $ $Date: 2005/12/01 13:44:38 $
58 * @see ConnectionContext
59 */
60 public class ContextInvocationHandler implements InvocationHandler {
61
62 /***
63 * The invocation handler to delegate to.
64 */
65 private final InvocationHandler _handler;
66
67 /***
68 * The connection performing the invocation.
69 */
70 private ManagedConnection _connection;
71
72 /***
73 * The connection factory for resolving connections via their URI.
74 */
75 private final ConnectionFactory _resolver;
76
77
78 /***
79 * Construct a new <code>ContextInvocationHandler</code>.
80 *
81 * @param handler the handler to delegate to
82 * @param resolver the connection factory for resolving connections via
83 * their URI
84 * @param connection the connection performing the invocation
85 */
86 public ContextInvocationHandler(InvocationHandler handler,
87 ConnectionFactory resolver,
88 ManagedConnection connection) {
89 _handler = handler;
90 _resolver = resolver;
91 _connection = connection;
92 }
93
94 /***
95 * Perform an invocation.
96 *
97 * @param invocation the invocation
98 */
99 public void invoke(Invocation invocation) {
100 _handler.invoke(new ContextInvocation(invocation));
101 }
102
103 private class ContextInvocation implements Invocation {
104
105 /***
106 * The invocation to delegate to.
107 */
108 private final Invocation _invocation;
109
110 /***
111 * Construct a new <code>ContextInvocation</code>.
112 *
113 * @param invocation the invocation
114 */
115 public ContextInvocation(Invocation invocation) {
116 _invocation = invocation;
117 }
118
119 /***
120 * Returns the request.
121 *
122 * @return the request
123 * @throws Throwable for any error
124 */
125 public Request getRequest() throws Throwable {
126 ConnectionContext.push(_connection.getPrincipal(), _resolver);
127 return _invocation.getRequest();
128 }
129
130 /***
131 * Returns the caller performing the invocation.
132 *
133 * @return the caller
134 */
135 public Caller getCaller() {
136 return _invocation.getCaller();
137 }
138
139 /***
140 * Sets the result of the invocation.
141 *
142 * @param response the result
143 */
144 public void setResponse(Response response) {
145 try {
146 _invocation.setResponse(response);
147 } finally {
148 ConnectionContext.pop();
149 }
150 }
151 }
152 }