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 }