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 }