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/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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 1.2.10.1 2004/03/04 00:18:29 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();
}
}
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velocity-Externally-Configured-logger.zip( 2,191 k)