1 /* SystemLogger.java -- Classpath's system debugging logger.
2    Copyright (C) 2005  Free Software Foundation, Inc.
3 
4 This file is a part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or (at
9 your option) any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under terms
30 of your choice, provided that you also meet, for each linked independent
31 module, the terms and conditions of the license of that module.  An
32 independent module is a module which is not derived from or based on
33 this library.  If you modify this library, you may extend this exception
34 to your version of the library, but you are not obligated to do so.  If
35 you do not wish to do so, delete this exception statement from your
36 version.  */
37 
38 
39 package gnu.classpath.debug;
40 
41 import gnu.java.security.action.GetPropertyAction;
42 
43 import java.security.AccessController;
44 import java.util.StringTokenizer;
45 import java.util.logging.Level;
46 import java.util.logging.Logger;
47 
48 public final class SystemLogger extends Logger
49 {
50   public static final SystemLogger SYSTEM = new SystemLogger();
51 
52   static
53   {
54     SYSTEM.setFilter (PreciseFilter.GLOBAL);
55     String defaults = (String) AccessController.doPrivileged
56       (new GetPropertyAction("gnu.classpath.debug.components"));
57 
58     if (defaults != null)
59       {
60         StringTokenizer tok = new StringTokenizer (defaults, ",");
61         while (tok.hasMoreTokens ())
62           {
63             Component c = Component.forName (tok.nextToken ());
64             if (c != null)
65               PreciseFilter.GLOBAL.enable (c);
SYSTEM.log(Level.INFO, R, c)66             SYSTEM.log (Level.INFO, "enabled: {0}", c);
67           }
68       }
69   }
70 
71   /**
72    * Fetch the system logger instance. The logger returned is meant for debug
73    * and diagnostic logging for Classpath internals.
74    *
75    * @return The system logger.
76    */
getSystemLogger()77   public static SystemLogger getSystemLogger()
78   {
79     // XXX Check some permission here?
80     return SYSTEM;
81   }
82 
83   /**
84    * Keep only one instance of the system logger.
85    */
SystemLogger()86   private SystemLogger()
87   {
88     super("gnu.classpath", null);
89   }
90 
91   /**
92    * Variable-arguments log method.
93    *
94    * @param level The level to log to.
95    * @param format The format string.
96    * @param args The arguments.
97    */
logv(Level level, String format, Object... args)98   public void logv(Level level, String format, Object... args)
99   {
100     log(level, format, args);
101   }
102 }
103