fileloghandler.java

来自「java语言开发的P2P流媒体系统」· Java 代码 · 共 109 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 java.util.logging.*;
import java.io.*;
import java.text.DateFormat;


/**
 * This log {@link java.util.logging.Handler} writes all
 * log messages to a file.
 * 
 * @author Michael Kaufmann
 */
public class FileLogHandler extends Handler
{
	private PrintWriter logWriter;
	
	private boolean isClosed = false;
	
	/**
	 * Creates a new <tt>FileLogHandler</tt> that will create a log file for the specified application.
	 * 
	 * @param applicationName The name of the application that wants to create a log file. This string is used as part of the log file name.
	 */	
	public FileLogHandler(String applicationName) throws IOException
	{
		logWriter = new PrintWriter(new FileWriter(applicationName + ".log", true)); //$NON-NLS-1$
	}
	
	public void publish(LogRecord record)
	{
		if (isClosed)
		{
			return;
		}
		
		if (getFilter() != null)
		{
			if (!getFilter().isLoggable(record))
			{
				return;
			}
		}
		
		String message;
		
		if (getFormatter() != null)
		{
			message = getFormatter().format(record);
		}
		else
		{
			message = record.getMessage();
		}
		
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM);
		logWriter.println(dateFormat.format(new java.util.Date()));
		
		if (record.getSourceClassName() != null)
		{
			logWriter.println(record.getSourceClassName());
		}
		
		logWriter.println(message);
		logWriter.println();
	}

	public void flush()
	{
		if (isClosed)
		{
			return;
		}
		
		logWriter.flush();
	}

	public void close() throws SecurityException
	{
		if (!isClosed)
		{
			logWriter.close();
		}
		
		isClosed = true;
	}
}