/*
* Copyright 2002-2004 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.
*/
package org.apache.avalon.excalibur.logger.log4j;
import org.apache.avalon.framework.logger.Logger;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.excalibur.logger.Log4JLogger;
import org.apache.avalon.excalibur.logger.LoggerManager;
import org.apache.log4j.spi.LoggerRepository;
/**
* This class sits on top of an existing Log4J Hierarchy
* and returns logger wrapping Log4J loggers.
*
* Attach PrefixDecorator and/or CachingDecorator if desired.
*
* @author <a href="mailto:dev@avalon.apache.org">Avalon Development Team</a>
* @version CVS $Revision: 1.4 $ $Date: 2004/03/10 13:54:51 $
* @since 4.0
*/
public class Log4JAdapter extends AbstractLogEnabled implements LoggerManager
{
protected final LoggerRepository m_hierarchy;
public Log4JAdapter( final LoggerRepository hierarchy )
{
if ( hierarchy == null ) throw new NullPointerException( "hierarchy" );
m_hierarchy = hierarchy;
}
/**
* Return the Logger for the specified category.
* Log4J probably won't like the "" category name
* so we shall better return its getRootLogger() instead.
*/
public Logger getLoggerForCategory( final String categoryName )
{
if ( null == categoryName || categoryName.length() == 0 )
{
return getDefaultLogger();
}
else
{
return new Log4JLogger( m_hierarchy.getLogger( categoryName ) );
}
}
/**
* Return the default Logger. This is basically the same
* as getting the Logger for the "" category.
*/
public Logger getDefaultLogger()
{
return new Log4JLogger( m_hierarchy.getRootLogger() );
}
}