logformatter.java

来自「java语言开发的P2P流媒体系统」· Java 代码 · 共 124 行

/* 
 * P2P-Radio - Peer to peer streaming system
 * Project homepage: http://p2p-radio.sourceforge.net/
 * Copyright (C) 2003-2004 Michael Kaufmann <[e-mail]>
 * 
 * ---------------------------------------------------------------------------
 * 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 p2pradio.logging;

import p2pradio.Messages;
import java.io.*;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;


/**
 * This log {@link java.util.logging.Formatter} formats all log messages
 * using the {@link p2pradio.Messages} class. It also checks if a String in the
 * parameters of a {@link java.util.logging.LogRecord} can be translated.
 * 
 * @author Michael Kaufmann
 */
public class LogFormatter extends Formatter
{
	private boolean forMonitor;
	
	public LogFormatter()
	{
		this(false);
	}
	
	public LogFormatter(boolean forMonitor)
	{
		super();
		this.forMonitor = forMonitor;
	}
	
	public String format(LogRecord record)
	{
		String message;
		
		if (record.getMessage() != null)
		{
			Object parameters[] = record.getParameters();
			
			if (parameters != null)
			{
				for (int i=0; i < parameters.length; i++)
				{
					// Parameter 黚ersetzen, falls n鰐ig
					if (parameters[i] instanceof String)
					{
						if (Messages.isTranslationAvailable((String)parameters[i]))
						{
							parameters[i] = Messages.getString((String)parameters[i]);
						}
					}
				}
				
				message = Messages.getString(record.getMessage(), parameters);
			}
			else
			{
				message = Messages.getString(record.getMessage());
			}
		}
		else
		{
			message = ""; //$NON-NLS-1$
		}
			
		//if (record.getSourceClassName() != null)
		//{
		//	event += " (" + record.getSourceClassName() + ")";
		//}
		
		Throwable throwable = record.getThrown();
		
		if (throwable != null)
		{
			if (forMonitor)
			{
				// Nur den Text der Exception ausgeben
				// (die Exception selbst wurde im Monitor k黱stlich erzeugt)
				
				message += " (" + throwable.getMessage() + ")"; //$NON-NLS-1$ //$NON-NLS-2$
			}
			else
			{
				ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
				OutputStreamWriter writer = new OutputStreamWriter(outputStream);
				PrintWriter printWriter = new PrintWriter(writer);
			
				throwable.printStackTrace(printWriter);
				printWriter.flush();
				
				message += " (" + outputStream.toString() + ")"; //$NON-NLS-1$ //$NON-NLS-2$
			}
		}
		
		return message;
	}
	
	public String formatMessage(LogRecord record)
	{
		return format(record);
	}
}