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Log4jLoggerFactory.java
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Log4jLoggerFactory.java
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/*
* Copyright 2001-2004 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.log4j;
import org.apache.log4j.spi.LoggerFactory;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* This class is a factory that creates and maintains org.apache.log4j.Loggers
* wrapping org.slf4j.Loggers.
*
* It keeps a hashtable of all created org.apache.log4j.Logger instances so that
* all newly created instances are not duplicates of existing loggers.
*
* @author Sébastien Pennec
*/
class Log4jLoggerFactory {
// String, Logger
private static final ConcurrentMap<String, Logger> log4jLoggers = new ConcurrentHashMap<>();
public static Logger getLogger(String name) {
org.apache.log4j.Logger instance = log4jLoggers.get(name);
if (instance != null) {
return instance;
} else {
Logger newInstance = new Logger(name);
Logger oldInstance = log4jLoggers.putIfAbsent(name, newInstance);
return oldInstance == null ? newInstance : oldInstance;
}
}
public static Logger getLogger(String name, LoggerFactory loggerFactory) {
org.apache.log4j.Logger instance = log4jLoggers.get(name);
if (instance != null) {
return instance;
} else {
Logger newInstance = loggerFactory.makeNewLoggerInstance(name);
Logger oldInstance = log4jLoggers.putIfAbsent(name, newInstance);
return oldInstance == null ? newInstance : oldInstance;
}
}
}