1 //****************************************************************************** 2 // 3 // File: Constants.java 4 // Package: edu.rit.pj.cluster 5 // Unit: Class edu.rit.pj.cluster.Constants 6 // 7 // This Java source file is copyright (C) 2006 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.pj.cluster; 41 42 import static java.lang.Long.parseLong; 43 44 /** 45 * Class Constants contains various constants used in the PJ cluster middleware. 46 * 47 * @author Alan Kaminsky 48 * @version 19-Oct-2006 49 */ 50 public class Constants { 51 52 // Prevent construction. 53 private Constants() { 54 } 55 56 // Exported constants. 57 /** 58 * Host name referring to all network interfaces (<code>"0.0.0.0"</code>). 59 */ 60 public static final String ALL_NETWORK_INTERFACES = "0.0.0.0"; 61 62 /** 63 * The default port number to which the Job Scheduler listens for 64 * connections from job frontend processes (20617). 65 */ 66 public static final int PJ_PORT = 20617; 67 68 /** 69 * The default port number for the Job Scheduler's web interface (8080). 70 */ 71 public static final int WEB_PORT = 8080; 72 73 /** 74 * The lease renewal interval (default is 60 seconds). 75 */ 76 public static final long LEASE_RENEW_INTERVAL; 77 78 /** 79 * The lease expiration interval (default is 150 seconds). 80 */ 81 public static final long LEASE_EXPIRE_INTERVAL; 82 83 static { 84 long renew; 85 try { 86 String leaseRenew = System.getProperty("pj.renew", "60000"); 87 renew = parseLong(leaseRenew); 88 } catch (Exception e) { 89 renew = 60000L; 90 } 91 LEASE_RENEW_INTERVAL = renew; 92 93 long expire; 94 try { 95 String leaseExpire = System.getProperty("pj.expire", "150000"); 96 expire = parseLong(leaseExpire); 97 } catch (Exception e) { 98 expire = 150000L; 99 } 100 LEASE_EXPIRE_INTERVAL = expire; 101 } 102 103 }