/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.logging.log4j.jcl;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogConfigurationException;
import org.apache.commons.logging.LogFactory;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.spi.AbstractLogger;
import org.apache.logging.log4j.spi.LoggerContext;
/**
*
*/
public class LogFactoryImpl extends LogFactory {
private final Map<LoggerContext, ConcurrentMap<String, Log>> contextMap =
new WeakHashMap<LoggerContext, ConcurrentMap<String, Log>>();
private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<String, Object>();
@Override
public Log getInstance(final String name) throws LogConfigurationException {
final ConcurrentMap<String, Log> loggers = getLoggersMap();
if (loggers.containsKey(name)) {
return loggers.get(name);
}
final org.apache.logging.log4j.Logger logger = PrivateManager.getLogger(name);
if (logger instanceof AbstractLogger) {
loggers.putIfAbsent(name, new Log4jLog((AbstractLogger) logger, name));
return loggers.get(name);
}
throw new LogConfigurationException(
"Commons Logging Adapter requires base logging system to extend Log4j AbstractLogger");
}
private ConcurrentMap<String, Log> getLoggersMap() {
final LoggerContext context = PrivateManager.getContext();
synchronized (contextMap) {
ConcurrentMap<String, Log> map = contextMap.get(context);
if (map == null) {
map = new ConcurrentHashMap<String, Log>();
contextMap.put(context, map);
}
return map;
}
}
@Override
public Object getAttribute(final String name) {
return attributes.get(name);
}
@Override
public String[] getAttributeNames() {
return attributes.keySet().toArray(new String[attributes.size()]);
}
@Override
public Log getInstance(@SuppressWarnings("rawtypes") final Class clazz) throws LogConfigurationException {
return getInstance(clazz.getName());
}
/**
* This method is supposed to clear all loggers. In this implementation it will clear all the logger
* wrappers but the loggers managed by the underlying logger context will not be.
*/
@Override
public void release() {
getLoggersMap().clear();
}
@Override
public void removeAttribute(final String name) {
attributes.remove(name);
}
@Override
public void setAttribute(final String name, final Object value) {
if (value != null) {
attributes.put(name, value);
} else {
removeAttribute(name);
}
}
/**
* The real bridge between commons logging and Log4j.
*/
private static class PrivateManager extends LogManager {
private static final String FQCN = LogFactory.class.getName();
public static LoggerContext getContext() {
return getContext(FQCN, false);
}
public static org.apache.logging.log4j.Logger getLogger(final String name) {
return getLogger(FQCN, name);
}
}
}