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Java > Open Source Codes > org > columba > core > main > Main


1 //The contents of this file are subject to the Mozilla Public License Version 1.1
2 //(the "License"); you may not use this file except in compliance with the
3 //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
4 //
5 //Software distributed under the License is distributed on an "AS IS" basis,
6 //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
7 //for the specific language governing rights and
8 //limitations under the License.
9 //
10 //The Original Code is "The Columba Project"
11 //
12 //The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
13 //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
14 //
15 //All Rights Reserved.
16
17 package org.columba.core.main;
18
19 import java.security.AllPermission JavaDoc;
20 import java.security.CodeSource JavaDoc;
21 import java.security.PermissionCollection JavaDoc;
22 import java.security.Permissions JavaDoc;
23 import java.security.Policy JavaDoc;
24
25 import org.columba.core.shutdown.ShutdownManager;
26
27 /**
28  * Columba's main class used to start the application.
29  */
30 public class Main {
31
32     /**
33      * global classloader used as parent classloader in Columba everywhere
34      */
35     public static MainClassLoader mainClassLoader;
36
37     public static void main(String JavaDoc[] args) throws Exception JavaDoc {
38
39         
40         // @author: fdietz
41 //
42 // PROBLEM: Extensions don't run using Java Webstart (JWS)
43 //
44 // Even though we assign "all-permission" in our columba.jnlp file, this
45 // only applies
46 // to the initial Java Webstart classloader. But, we create our own
47 // classloaders for
48 // loading extensions. These classloaders don't have the same permission
49 // settings anymore.
50
51         // WORKAROUND:
52 //
53 // System.setSecurityManager(null);
54 //
55 // This call effectly disables the sandbox mode and seems to work fine.
56 //
57 // Below I use another way. The policy for all classloaders is set to
58 // "all-permissions".
59 // Don't really know the difference though.
60
61         // grant "all-permissions"
62 Policy.setPolicy(new Policy JavaDoc() {
63             public PermissionCollection JavaDoc getPermissions(CodeSource JavaDoc codesource) {
64                 Permissions JavaDoc perms = new Permissions JavaDoc();
65                 perms.add(new AllPermission JavaDoc());
66                 return (perms);
67             }
68
69             public void refresh() {
70             }
71         });
72
73         start(args);
74     }
75
76     
77     public static void restart(String JavaDoc[] args) throws Exception JavaDoc {
78
79         // shutdown Columba
80 ShutdownManager.getInstance().shutdown(0);
81         // set global class loader to null
82 mainClassLoader = null;
83
84         // force object finalization
85 System.runFinalization();
86
87         // run garbage collector
88 System.gc();
89
90         // startup Columba
91 start(args);
92     }
93
94     private static void start(String JavaDoc[] args) throws Exception JavaDoc {
95         // initialize global class loader
96 mainClassLoader = new MainClassLoader(Main.class.getClassLoader());
97
98         long start = System.currentTimeMillis();
99
100         // use global class loader to bootstrap Columba
101 Bootstrap startup = (Bootstrap) mainClassLoader.loadClass(
102                 Bootstrap.class.getName()).newInstance();
103         startup.run(args);
104
105         long stop = System.currentTimeMillis();
106
107         System.out.println("total startup time (ms)=" + (stop - start));
108         System.out.println("total startup time (sec)=" + (stop - start) / 1000);
109     }
110 }
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