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Java > Open Source Codes > com > quadcap > net > server > Acceptor


1 package com.quadcap.net.server;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.IOException JavaDoc;
42
43 import java.net.ServerSocket JavaDoc;
44 import java.net.Socket JavaDoc;
45
46 import com.quadcap.util.Debug;
47
48 /**
49  * Implements the main socket listening thread: we first obtain a block
50  * of idle workers (currently 4, should be configurable though.)
51  * then accept connections and pass them out until we need more workers.
52  *
53  * @author Stan Bailes
54  */
55 public class Acceptor implements Runnable JavaDoc {
56     Server server;
57     int port;
58     ServerSocket JavaDoc serverSocket;
59     boolean terminate = false;
60
61     public Acceptor(Server server, int port, int queueDepth)
62         throws IOException JavaDoc
63     {
64         this.server = server;
65         this.port = port;
66         this.serverSocket = new ServerSocket JavaDoc(port, queueDepth);
67     }
68
69     public void run() {
70         while (!terminate) {
71             try {
72                 Worker w = server.getIdleWorker();
73                 Socket JavaDoc socket = null;
74                 try {
75                     socket = serverSocket.accept();
76                     w.handle(socket, port);
77                 } catch (Throwable JavaDoc e) {
78                     Debug.print(e);
79                     server.returnIdleWorker(w);
80                 }
81             } catch (Throwable JavaDoc e) {
82                 Debug.print(e);
83                 terminate = true;
84             }
85         }
86     }
87
88     static final int WCNT = 4;
89     
90     public void runxxx() {
91         Worker[] wv = new Worker[WCNT];
92         int valid = -1;
93         int pos = 0;
94         while (!terminate) {
95             try {
96                 while (pos >= valid) {
97                     valid = server.getIdleWorkers(wv);
98                     pos = 0;
99                 }
100                 while (pos < valid && !terminate) {
101                     Worker w = wv[pos++];
102                     try {
103                         Socket JavaDoc socket = serverSocket.accept();
104                         w.handle(socket, port);
105                     } catch (Throwable JavaDoc e) {
106                         Debug.print(e);
107                         server.returnIdleWorker(w);
108                     }
109                 }
110             } catch (Exception JavaDoc e) {
111                 Debug.print(e);
112                 terminate = true;
113             }
114         }
115     }
116
117     public void stop() {
118     }
119 }
120
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