/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Velocity", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import org.apache.velocity.app.Velocity;
import org.apache.velocity.runtime.log.LogSystem;
import org.apache.velocity.runtime.RuntimeServices;


/**
 *  This is a toy demonstration of how Velocity
 *  can use an externally configured logger.  In 
 *  this example, the class using Velocity
 *  implements Velocity's logger interface, and
 *  all Velocity log messages are funneled back
 *  through it.
 *
 * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
 * @version $Id: LoggerExample.java,v 1.2 2001/09/09 07:26:24 geirm Exp $
 */
public class LoggerExample implements LogSystem
{
    public LoggerExample()
    {
        try
        {
            /*
             *  this class implements the LogSystem interface, so we
             *  can use it as a logger for Velocity
             */
            
            Velocity.setProperty(Velocity.RUNTIME_LOG_LOGSYSTEM, this );
            Velocity.init();

            /*
             *  that will be enough.  The Velocity initialization will be 
             *  output to stdout because of our
             *  logVelocityMessage() method in this class
             */
        }
        catch( Exception e )
        {
            System.out.println("Exception : " + e);
        }
    }

	/**
	 *  Required init() method for LogSystem
	 *  to get access to RuntimeServices
	 */ 
	 public void init( RuntimeServices rs )
	 {
	 	return;
	 }
	 
    /**
     *  This is the key method needed to implement a logging interface
     *  for Velocity.
     */ 
    public void logVelocityMessage(int level, String message)
    {
        System.out.println("level : " + level + " msg : " + message);
    }

    public static void main(String[] args)
    {
        LoggerExample t = new LoggerExample();
    }
}