//severSimpleLogFormatter.java 
//-------------------------------------
//part of YACY
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//
//This file is contributed by Martin Thelian
//last major change: $LastChangedDate: 2008-08-02 14:12:04 +0200 (Sat, 02 Aug 2008) $ by $LastChangedBy$
//Revision: $LastChangedRevision$
//
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

package net.yacy.kelondro.logging;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.FieldPosition;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;


public final class SimpleLogFormatter extends SimpleFormatter {


      private final Date date = new Date();      
      private final FieldPosition position = new FieldPosition(0);

      // e.g. 2005/05/25 11:22:53
      private final SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss", Locale.US);
      
      private final StringBuffer buffer = new StringBuffer();
  
      public SimpleLogFormatter() {
          super();
      }        
      
    @Override
      public final synchronized String format(final LogRecord record) {
          
          final StringBuffer stringBuffer = this.buffer;
          stringBuffer.setLength(0);
          
          // adding the loglevel
          final int logLevel = record.getLevel().intValue();
          if (logLevel == Log.LOGLEVEL_SEVERE) 
              this.buffer.append(Log.LOGTOKEN_SEVERE); 
          else if (logLevel == Log.LOGLEVEL_WARNING) 
              this.buffer.append(Log.LOGTOKEN_WARNING);
          else if (logLevel == Log.LOGLEVEL_CONFIG)
              this.buffer.append(Log.LOGTOKEN_CONFIG);
          else if (logLevel == Log.LOGLEVEL_INFO)
              this.buffer.append(Log.LOGTOKEN_INFO);
          else if (logLevel == Log.LOGLEVEL_FINE) 
              this.buffer.append(Log.LOGTOKEN_FINE);
          else if (logLevel == Log.LOGLEVEL_FINER) 
              this.buffer.append(Log.LOGTOKEN_FINER);        
          else if (logLevel == Log.LOGLEVEL_FINEST) 
              this.buffer.append(Log.LOGTOKEN_FINEST);            
          else 
              this.buffer.append(Log.LOGTOKEN_FINE);
          this.buffer.append(' ');
          
          // adding the logging date
          this.date.setTime(record.getMillis());
          this.position.setBeginIndex(0);
          this.formatter.format(this.date, this.buffer, this.position);

          // adding the logger name
          stringBuffer.append(' ');
          stringBuffer.append(record.getLoggerName());
          
          // adding the logging message
          stringBuffer.append(' ');
          stringBuffer.append(formatMessage(record));
          
          // adding the stack trace if available
          stringBuffer.append(System.getProperty("line.separator"));
          if (record.getThrown() != null) {
              StringWriter writer = null;
              try {
                  writer = new StringWriter();
                  final PrintWriter printer = new PrintWriter(writer);
                  record.getThrown().printStackTrace(printer);
                  stringBuffer.append(writer.toString());
              } catch (final Exception e) {
                  stringBuffer.append("Failed to get stack trace: ").append(e.getMessage());
              } finally {
                  if (writer != null) try {writer.close();} catch (final Exception ex) {}
              }
          }
          return stringBuffer.toString();
      }
}