Package com.enterprisedt.util.debug

Source Code of com.enterprisedt.util.debug.FileAppender

/**
*
*  Copyright (C) 2000-2004 Enterprise Distributed Technologies Ltd
*
*  www.enterprisedt.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
*  Bug fixes, suggestions and comments should be sent to support@enterprisedt.com
*
*  Change Log:
*
*    $Log: FileAppender.java,v $
*    Revision 1.8  2010-10-22 03:53:07  bruceb
*    closed checks and remove stderr printing
*
*    Revision 1.7  2010-10-15 06:10:29  bruceb
*    rolling file appender changes
*
*    Revision 1.6  2007-04-26 04:21:47  hans
*    Keep reference to File object.
*
*    Revision 1.5  2006/10/12 12:38:58  bruceb
*    synchronized methods
*
*    Revision 1.4  2006/10/11 08:43:11  hans
*    made cvsId final
*
*    Revision 1.3  2005/01/28 16:39:15  bruceb
*    flush FileAppender
*
*    Revision 1.2  2004/08/16 21:08:08  bruceb
*    made cvsids public
*
*    Revision 1.1  2004/05/01 16:55:42  bruceb
*    first cut
*
*
*/
package com.enterprisedt.util.debug;

import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

/**
*  Appends log statements to a file
*
@author      Bruce Blackshaw
@version     $Revision: 1.8 $
*/
public class FileAppender implements Appender {
   
    /**
     *  Revision control id
     */
    public final static String cvsId = "@(#)$Id: FileAppender.java,v 1.8 2010-10-22 03:53:07 bruceb Exp $";

    /**
     * Destination
     */
    protected PrintWriter log;
   
    /**
     * Path of logging file.
     */
    private String file;
   
    /**
     * True if closed
     */
    protected boolean closed = false;
   
    /**
     * Constructor
     *
     * @param file      file to log to
     * @throws IOException
     */
    public FileAppender(String file) throws IOException {     
        this.file = file;
        open();
    }
   
    protected synchronized void open() throws IOException {
        log = new PrintWriter(new FileWriter(file, true), true);
        closed = false;
    }
   
    /**
     * Log a message
     *
     * @param msg  message to log
     */
    public synchronized void log(String msg) {
        if (!closed)
            log.println(msg);
    }
   
    /* (non-Javadoc)
     * @see com.enterprisedt.util.debug.Appender#log(java.lang.Throwable)
     */
    public synchronized void log(Throwable t) {
        if (!closed) {
            t.printStackTrace(log);
            log.println();
        }
    }

    /* (non-Javadoc)
     * @see com.enterprisedt.util.debug.Appender#close()
     */
    public synchronized void close() {
        if (!closed) {
            closed = true;
            log.flush();
            log.close();
            log = null;
        }
    }

    /**
     * Returns the path of the logging file.
     *
     * @return the path of the logging file.
     */
    public String getFile() {
    return file;
  }
}
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