/*
* Copyright 2002-2006,2009 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 com.opensymphony.xwork2.util.logging;
import com.opensymphony.xwork2.util.logging.jdk.JdkLoggerFactory;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
* Creates loggers. Static accessor will lazily try to decide on the best factory if none specified.
*/
public abstract class LoggerFactory {
private static final ReadWriteLock lock = new ReentrantReadWriteLock();
private static LoggerFactory factory;
public static void setLoggerFactory(LoggerFactory factory) {
lock.writeLock().lock();
try {
LoggerFactory.factory = factory;
} finally {
lock.writeLock().unlock();
}
}
public static Logger getLogger(Class<?> cls) {
return getLoggerFactory().getLoggerImpl(cls);
}
public static Logger getLogger(String name) {
return getLoggerFactory().getLoggerImpl(name);
}
protected static LoggerFactory getLoggerFactory() {
lock.readLock().lock();
try {
if (factory != null) {
return factory;
}
} finally {
lock.readLock().unlock();
}
lock.writeLock().lock();
try {
if (factory == null) {
try {
Class.forName("org.apache.commons.logging.LogFactory");
factory = new com.opensymphony.xwork2.util.logging.commons.CommonsLoggerFactory();
} catch (ClassNotFoundException ex) {
// commons logging not found, falling back to jdk logging
factory = new JdkLoggerFactory();
}
}
return factory;
}
finally {
lock.writeLock().unlock();
}
}
protected abstract Logger getLoggerImpl(Class<?> cls);
protected abstract Logger getLoggerImpl(String name);
}