Source for gnu.classpath.debug.SystemLogger

   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);
  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:    */
  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:    */
  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:    */
  98:   public void logv(Level level, String format, Object... args)
  99:   {
 100:     log(level, format, args);
 101:   }
 102: }