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Java > Open Source Codes > org > exolab > jms > net > http > HTTPMultiplexer


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 2004-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: HTTPMultiplexer.java,v 1.3 2005/05/24 06:09:50 tanderson Exp $
44  */
45 package org.exolab.jms.net.http;
46
47 import java.io.DataInputStream JavaDoc;
48 import java.io.DataOutputStream JavaDoc;
49 import java.io.IOException JavaDoc;
50 import java.security.Principal JavaDoc;
51
52 import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
53
54 import org.exolab.jms.net.connector.*;
55 import org.exolab.jms.net.connector.SecurityException;
56 import org.exolab.jms.net.multiplexer.Endpoint;
57 import org.exolab.jms.net.multiplexer.Multiplexer;
58 import org.exolab.jms.net.multiplexer.MultiplexerListener;
59 import org.exolab.jms.net.uri.URI;
60 import org.exolab.jms.net.uri.URIHelper;
61
62
63 /**
64  * Multiplexes data over an HTTP connection.
65  *
66  * @author <a HREF="mailto:tma@netspace.net.au">Tim Anderson</a>
67  * @version $Revision: 1.3 $ $Date: 2005/05/24 06:09:50 $
68  */
69 class HTTPMultiplexer extends Multiplexer {
70
71     /**
72      * The client URI.
73      */
74     private URI _clientURI;
75
76
77     /**
78      * Construct a new client-side <code>HTTPMultiplexer</code>.
79      *
80      * @param listener the multiplexer listener
81      * @param endpoint the endpoint to multiplex messages over
82      * @param clientURI the local address that the connection is bound to
83      * @param principal the security principal
84      * @param pool thread pool for handling invocation requests
85      * @throws IOException if an I/O error occurs
86      * @throws SecurityException if connection is refused by the server
87      */
88     public HTTPMultiplexer(MultiplexerListener listener, Endpoint endpoint,
89                            URI clientURI, Principal JavaDoc principal,
90                            PooledExecutor pool)
91             throws IOException JavaDoc, SecurityException JavaDoc {
92         if (clientURI == null) {
93             throw new IllegalArgumentException JavaDoc("Argument 'clientURI' is null");
94         }
95         _clientURI = clientURI;
96         initialise(listener, endpoint, pool, true);
97         authenticate(principal);
98     }
99
100     /**
101      * Construct a new server-side <code>HTTPMultiplexer</code>.
102      *
103      * @param listener the multiplexer listener
104      * @param endpoint the endpoint to multiplex messages over
105      * @param authenticator the connection authetnicator
106      * @param pool thread pool for handling invocation requests
107      * @throws IOException if an I/O error occurs
108      * @throws ResourceException if the authenticator cannot authenticate
109      */
110     public HTTPMultiplexer(MultiplexerListener listener, Endpoint endpoint,
111                            Authenticator authenticator, PooledExecutor pool)
112             throws IOException JavaDoc, ResourceException {
113         super(listener, endpoint, authenticator, pool);
114     }
115
116     /**
117      * Returns the client URI.
118      *
119      * @return the client URI
120      */
121     public URI getClientURI() {
122         return _clientURI;
123     }
124
125     /**
126      * Perform handshaking on initial connection, to verify protocol, and
127      * establish the client URI.
128      *
129      * @param out the endpoint's output stream
130      * @param in the endpoint's input stream
131      * @throws IOException for any I/O error
132      */
133     protected void handshake(DataOutputStream JavaDoc out, DataInputStream JavaDoc in)
134             throws IOException JavaDoc {
135         super.handshake(out, in);
136         if (isClient()) {
137             out.writeUTF(_clientURI.toString());
138         } else {
139             String JavaDoc uri = in.readUTF();
140             _clientURI = URIHelper.parse(uri);
141         }
142     }
143
144 }
145
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