/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.logbridge;
import java.util.Map;
import java.util.Collections;
import java.util.WeakHashMap;
import java.util.Enumeration;
import java.util.ResourceBundle;
import java.util.MissingResourceException;
import java.text.MessageFormat;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.Filter;
import java.util.logging.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.spi.LoggerRepository;
/**
*
*/
public final class LogBridgeHandler extends Handler {
private final LevelMapper levelMapper = new LevelMapper();
@SuppressWarnings({ "NonConstantLogger" })
private final java.util.logging.Logger rootLogger = java.util.logging.Logger.getLogger("");
/**
* A weak-key map of log4j loggers to JDK loggers. Keep this map so that the configuration setting is
* retained even if the JDK logger is otherwise unreferenced.
*/
private final Map<Logger, java.util.logging.Logger> loggerMap = Collections.synchronizedMap(new WeakHashMap<Logger,java.util.logging.Logger>());
private static final Logger log = Logger.getLogger(LogBridgeHandler.class);
private static final String LOGGER_CLASS_NAME = java.util.logging.Logger.class.getName();
public void setFilter(final Filter newFilter) throws SecurityException {
}
public void setLevel(final Level newLevel) throws SecurityException {
}
public boolean isLoggable(final LogRecord record) {
return true;
}
public void publish(final LogRecord record) {
Logger targetLogger = Logger.getLogger(record.getLoggerName());
final Priority targetLevel = levelMapper.getTargetLevelForSourceLevel(record.getLevel());
final String text = formatRecord(record);
targetLogger.log(LOGGER_CLASS_NAME, targetLevel, text, record.getThrown());
}
private String formatRecord(final LogRecord record) {
final ResourceBundle bundle = record.getResourceBundle();
String msg = record.getMessage();
if (bundle != null) {
try {
msg = bundle.getString(msg);
} catch (MissingResourceException ex) {
// ignore
}
}
final Object[] parameters = record.getParameters();
return parameters != null &&
parameters.length > 0 &&
msg.indexOf('{') >= 0 ? MessageFormat.format(msg, parameters) : msg;
}
public void flush() {
}
public void close() throws SecurityException {
}
public void start() {
rootLogger.addHandler(this);
updateLoggers();
}
public void stop() {
rootLogger.removeHandler(this);
}
LevelMapper getLevelMapper() {
return levelMapper;
}
public void updateLoggers() {
log.trace("Syncing up JDK logger levels from Log4j");
final Map<Logger, java.util.logging.Logger> loggerMap = this.loggerMap;
final LevelMapper levelMapper = this.levelMapper;
loggerMap.clear();
final Logger rootLogger = Logger.getRootLogger();
final LoggerRepository repository = rootLogger.getLoggerRepository();
final Enumeration loggers = repository.getCurrentLoggers();
while (loggers.hasMoreElements()) {
final Logger logger = (Logger) loggers.nextElement();
final String name = logger.getName();
final java.util.logging.Logger jdkLogger = java.util.logging.Logger.getLogger(name);
final org.apache.log4j.Level targetLevel = logger.getLevel();
if (targetLevel == null) {
if (log.isTraceEnabled()) {
log.trace("Remapping logger \"" + name + "\" with null level");
}
jdkLogger.setLevel(null);
} else {
final Level sourceLevel = levelMapper.getSourceLevelForTargetLevel(targetLevel);
if (log.isTraceEnabled()) {
log.trace("Remapping logger \"" + name + "\" to JDK level \"" + sourceLevel + "\"");
}
loggerMap.put(logger, jdkLogger);
jdkLogger.setLevel(sourceLevel);
}
}
final Level sourceLevel = levelMapper.getSourceLevelForTargetLevel(rootLogger.getLevel());
if (log.isTraceEnabled()) {
log.trace("Remapping root logger to JDK level \"" + sourceLevel + "\"");
}
this.rootLogger.setLevel(sourceLevel);
}
}