com.liferay.portal.kernel.log.LogFactoryUtil Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library 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 library 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.
*/
package com.liferay.portal.kernel.log;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* @author Brian Wing Shun Chan
* @author Shuyang Zhou
* @author Raymond Augé
*/
public class LogFactoryUtil {
public static Log getLog(Class c) {
return getLog(c.getName());
}
public static Log getLog(String name) {
// The following concurrent collection retrieve has the side effect of a
// memory fence read. This will invalidate all dirty cache data if there
// are any. If the LogWrapper swap happens before this, the new Log will
// be visible to the current Thread.
LogWrapper logWrapper = _logWrappers.get(name);
if (logWrapper == null) {
if (SanitizerLogWrapper.isEnabled()) {
logWrapper = new SanitizerLogWrapper(_logFactory.getLog(name));
}
else {
logWrapper = new LogWrapper(_logFactory.getLog(name));
}
LogWrapper previousLogWrapper = _logWrappers.putIfAbsent(
name, logWrapper);
if (previousLogWrapper != null) {
logWrapper = previousLogWrapper;
}
}
return logWrapper;
}
public static LogFactory getLogFactory() {
return _logFactory;
}
public static void setLogFactory(LogFactory logFactory) {
for (Map.Entry entry : _logWrappers.entrySet()) {
String name = entry.getKey();
LogWrapper logWrapper = entry.getValue();
logWrapper.setLog(logFactory.getLog(name));
}
// The following volatile write will flush out all cache data. All
// previously swapped LogWrappers will be visible for any reads after a
// memory fence read according to the happens-before rules.
_logFactory = logFactory;
}
private static volatile LogFactory _logFactory = new Jdk14LogFactoryImpl();
private static final ConcurrentMap _logWrappers =
new ConcurrentHashMap<>();
}