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Java > Open Source Codes > AcceptHandler


1 /*
2  * @(#)AcceptHandler.java 1.3 05/11/17
3  *
4  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * -Redistribution of source code must retain the above copyright notice, this
10  * list of conditions and the following disclaimer.
11  *
12  * -Redistribution in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * Neither the name of Sun Microsystems, Inc. or the names of contributors may
17  * be used to endorse or promote products derived from this software without
18  * specific prior written permission.
19  *
20  * This software is provided "AS IS," without a warranty of any kind. ALL
21  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
22  * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
23  * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
24  * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
25  * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
26  * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
27  * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
28  * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
29  * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
30  * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
31  *
32  * You acknowledge that this software is not designed, licensed or intended
33  * for use in the design, construction, operation or maintenance of any
34  * nuclear facility.
35  */
36
37 import java.io.*;
38 import java.nio.channels.*;
39 import javax.net.ssl.*;
40
41 /**
42  * A single threaded Handler that performs accepts SocketChannels and
43  * registers the Channels with the read/write Selector.
44  *
45  * @author Mark Reinhold
46  * @author Brad R. Wetmore
47  * @version 1.3, 05/11/17
48  */
49 class AcceptHandler implements Handler {
50
51     private ServerSocketChannel channel;
52     private Dispatcher dsp;
53
54     private SSLContext sslContext;
55
56     AcceptHandler(ServerSocketChannel ssc, Dispatcher dsp,
57         SSLContext sslContext) {
58     channel = ssc;
59     this.dsp = dsp;
60     this.sslContext = sslContext;
61     }
62
63     public void handle(SelectionKey sk) throws IOException {
64
65     if (!sk.isAcceptable())
66         return;
67
68     SocketChannel sc = channel.accept();
69     if (sc == null) {
70         return;
71     }
72
73     ChannelIO cio = (sslContext != null ?
74         ChannelIOSecure.getInstance(
75         sc, false /* non-blocking */, sslContext) :
76         ChannelIO.getInstance(
77         sc, false /* non-blocking */));
78
79     RequestHandler rh = new RequestHandler(cio);
80     dsp.register(cio.getSocketChannel(), SelectionKey.OP_READ, rh);
81     }
82 }
83
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