1 //******************************************************************************
2 //
3 // File: Constants.java
4 // Package: edu.rit.mp
5 // Unit: Class edu.rit.mp.Constants
6 //
7 // This Java source file is copyright (C) 2007 by Alan Kaminsky. All rights
8 // reserved. For further information, contact the author, Alan Kaminsky, at
9 // ark@cs.rit.edu.
10 //
11 // This Java source file is part of the Parallel Java Library ("PJ"). PJ is free
12 // software; you can redistribute it and/or modify it under the terms of the GNU
13 // General Public License as published by the Free Software Foundation; either
14 // version 3 of the License, or (at your option) any later version.
15 //
16 // PJ is distributed in the hope that it will be useful, but WITHOUT ANY
17 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
18 // A PARTICULAR PURPOSE. See the GNU General Public License for more details.
19 //
20 // Linking this library statically or dynamically with other modules is making a
21 // combined work based on this library. Thus, the terms and conditions of the GNU
22 // General Public License cover the whole combination.
23 //
24 // As a special exception, the copyright holders of this library give you
25 // permission to link this library with independent modules to produce an
26 // executable, regardless of the license terms of these independent modules, and
27 // to copy and distribute the resulting executable under terms of your choice,
28 // provided that you also meet, for each linked independent module, the terms
29 // and conditions of the license of that module. An independent module is a module
30 // which is not derived from or based on this library. If you modify this library,
31 // you may extend this exception to your version of the library, but you are not
32 // obligated to do so. If you do not wish to do so, delete this exception
33 // statement from your version.
34 //
35 // A copy of the GNU General Public License is provided in the file gpl.txt. You
36 // may also obtain a copy of the GNU General Public License on the World Wide
37 // Web at http://www.gnu.org/licenses/gpl.html.
38 //
39 //******************************************************************************
40 package edu.rit.mp;
41
42 /**
43 * Class Constants provides various constants used in the Message Protocol (MP).
44 *
45 * @author Alan Kaminsky
46 * @version 26-Nov-2007
47 */
48 class Constants {
49
50 // Prevent construction.
51 private Constants() {
52 }
53
54 // Magic number.
55 static final int MAGIC_NUMBER = 30144596;
56
57 // Item types.
58 static final byte TYPE_BOOLEAN = (byte) 1;
59 static final byte TYPE_BYTE = (byte) 2;
60 static final byte TYPE_SHORT = (byte) 3;
61 static final byte TYPE_INTEGER = (byte) 4;
62 static final byte TYPE_LONG = (byte) 5;
63 static final byte TYPE_CHARACTER = (byte) 6;
64 static final byte TYPE_FLOAT = (byte) 7;
65 static final byte TYPE_DOUBLE = (byte) 8;
66 static final byte TYPE_OBJECT = (byte) 9;
67 static final byte TYPE_SIGNED_8_BIT_INTEGER = (byte) 10;
68 static final byte TYPE_SIGNED_16_BIT_INTEGER = (byte) 11;
69 static final byte TYPE_UNSIGNED_8_BIT_INTEGER = (byte) 12;
70 static final byte TYPE_UNSIGNED_16_BIT_INTEGER = (byte) 13;
71
72 static final byte TYPE_FIRST = TYPE_BOOLEAN;
73 static final byte TYPE_LAST = TYPE_UNSIGNED_16_BIT_INTEGER;
74
75 // Default buffer size in bytes. This is the Ethernet MTU (1500) minus the IP
76 // header (20) minus the TCP header (20), times 20.
77 static final int BUFFER_SIZE = 29200;
78
79 }