/* ===========================================================
 * JDBMonitor : a flexiable JDBC Monitor for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2006-2006, by yang zhongke
 *
 * Project Info:  http://www.cownew.com
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * FileDBListener.java
 * ---------------
 * (C) Copyright 2006-2006, by yang zhongke
 *
 * Original Author:  yang zhongke;
 *
 * Changes
 * -------
 *
 */
package com.cownew.JDBMonitor.listenerImpl;

import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import com.cownew.JDBMonitor.common.IDBListener;
import com.cownew.JDBMonitor.common.InstanceUtils;
import com.cownew.JDBMonitor.common.LoggerException;
import com.cownew.JDBMonitor.common.LoggerUtils;
import com.cownew.JDBMonitor.common.SQLInfo;

/**
 * <p>this DBListener will print the loginfo to a file</p>
 * <p>the file to be writen is defined in the "arg" attribute of the "Listener" tag</p>
 * <p>eg.&lt;Listener class="com.cownew.JDBMonitor.listenerImpl.FileDBListener" arg="c:/aaa.txt"/&gt;</P>
 * @author yang zhongke
 */
public class FileDBListener implements IDBListener
{

	private String fileName;
	public void init(String arg) throws LoggerException
	{
		fileName = arg;		
	}

	public synchronized void logSql(SQLInfo info) throws LoggerException
	{
		DataOutputStream dos = null;
		try
		{
			dos = new DataOutputStream(new FileOutputStream(fileName,true));			
			String s = info.toString();
			dos.writeBytes("******************************************\n"+s);			
		} 		
		catch (FileNotFoundException e)
		{
			throw LoggerUtils.toLoggerException(e);
		} catch (IOException e)
		{
			throw LoggerUtils.toLoggerException(e);
		}	
		finally
		{
			InstanceUtils.closeOutStream(dos);
		}
	}

}