/*
* JBoss, Home of Professional Open Source
* Copyright 2007, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.seam.interop.jul;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Filter;
import java.util.logging.Formatter;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;
import org.apache.log4j.Logger;
/**
* This filter is used to convert java.util.logging messages from the JUL
* to Log4J messages.
*
* You need to install it onto any JUL Logger which needs bridging
* using logger.setFilter();
*
* @author Stan Silvert
* @author Pete Muir
*/
public class Log4JConversionFilter implements Filter
{
// cache Logger instances. Logger.getLogger() is known to be slow.
// See http://www.qos.ch/logging/thinkAgain.jsp
private Map<String, Logger> loggerCache = new HashMap<String, Logger>();
private Formatter formatter = new SimpleFormatter();
/**
* If the JSF RI message should be logged, convert the JDK 1.4
* LogRecord to a Log4J message.
*
* @return <code>false</code> because JDK 1.4 logging should not happen
* for JSF if this filter is active.
*/
public boolean isLoggable(LogRecord record)
{
Logger logger = getLogger(record);
if (record.getThrown() != null)
{
logWithThrowable(logger, record);
}
else
{
logWithoutThrowable(logger, record);
}
return false;
}
private void logWithThrowable(Logger logger, LogRecord record)
{
int loggedLevel = record.getLevel().intValue();
Object message = formatter.formatMessage(record);
Throwable throwable = record.getThrown();
if (loggedLevel == Level.SEVERE.intValue())
{
logger.error(message, throwable);
return;
}
if (loggedLevel == Level.WARNING.intValue())
{
logger.warn(message, throwable);
return;
}
if ((loggedLevel == Level.INFO.intValue()) ||
(loggedLevel == Level.CONFIG.intValue()))
{
logger.info(message, throwable);
return;
}
if (loggedLevel == Level.FINE.intValue())
{
logger.debug(message, throwable);
return;
}
if ((loggedLevel == Level.FINER.intValue()) ||
(loggedLevel == Level.FINEST.intValue()))
{
logger.trace(message, throwable);
return;
}
logger.info(message, throwable);
}
private void logWithoutThrowable(Logger logger, LogRecord record)
{
int loggedLevel = record.getLevel().intValue();
Object message = formatter.formatMessage(record);
if (loggedLevel == Level.SEVERE.intValue())
{
logger.error(message);
return;
}
if (loggedLevel == Level.WARNING.intValue())
{
logger.warn(message);
return;
}
if ((loggedLevel == Level.INFO.intValue()) ||
(loggedLevel == Level.CONFIG.intValue()))
{
logger.info(message);
return;
}
if (loggedLevel == Level.FINE.intValue())
{
logger.debug(message);
return;
}
if ((loggedLevel == Level.FINER.intValue()) ||
(loggedLevel == Level.FINEST.intValue()))
{
logger.trace(message);
return;
}
logger.info(message);
}
// get the Log4J logger corresponding to the java.util.logger.LogRecord
private Logger getLogger(LogRecord record)
{
String loggerName = record.getLoggerName();
Logger logger = loggerCache.get(loggerName);
if (logger == null)
{
logger = Logger.getLogger(loggerName);
loggerCache.put(loggerName, logger);
}
return logger;
}
}