com.opensymphony.xwork2.util.logging.LoggerFactory Maven / Gradle / Ivy
/*
* 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 com.opensymphony.xwork2.util.logging;
import com.opensymphony.xwork2.XWorkConstants;
import com.opensymphony.xwork2.XWorkException;
import com.opensymphony.xwork2.util.logging.commons.CommonsLoggerFactory;
import com.opensymphony.xwork2.util.logging.jdk.JdkLoggerFactory;
import com.opensymphony.xwork2.util.logging.log4j2.Log4j2LoggerFactory;
import com.opensymphony.xwork2.util.logging.slf4j.Slf4jLoggerFactory;
import java.util.LinkedList;
import java.util.List;
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.
*
* @deprecated since 2.5
*/
@Deprecated
public abstract class LoggerFactory {
private static final ReadWriteLock lock = new ReentrantReadWriteLock();
private static LoggerFactory factory;
private static final List loggers = new LinkedList(){
{
add(new LoggerClass("org.apache.commons.logging.LogFactory", CommonsLoggerFactory.class));
add(new LoggerClass("org.slf4j.LoggerFactory", Slf4jLoggerFactory.class));
add(new LoggerClass("org.apache.logging.log4j.LogManager", Log4j2LoggerFactory.class));
}
};
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) {
createLoggerFactory();
}
return factory;
} finally {
lock.writeLock().unlock();
}
}
private static void createLoggerFactory() {
String userLoggerFactory = System.getProperty(XWorkConstants.XWORK_LOGGER_FACTORY);
if (userLoggerFactory != null) {
try {
Class clazz = Class.forName(userLoggerFactory);
factory = (LoggerFactory) clazz.newInstance();
} catch (Exception e) {
throw new XWorkException("System property [" + XWorkConstants.XWORK_LOGGER_FACTORY +
"] was defined as [" + userLoggerFactory + "] but there is a problem to use that LoggerFactory!", e);
}
} else {
factory = new JdkLoggerFactory();
for (LoggerClass logger : loggers) {
if (logger.isSupported()) {
factory = logger.createInstance();
break;
}
}
}
}
protected abstract Logger getLoggerImpl(Class cls);
protected abstract Logger getLoggerImpl(String name);
private static class LoggerClass {
private final String loggerClazzName;
private final Class loggerImplClazz;
public LoggerClass(String loggerClazzName, Class loggerImplClazz) {
this.loggerClazzName = loggerClazzName;
this.loggerImplClazz = loggerImplClazz;
}
public boolean isSupported() {
try {
Class.forName(loggerClazzName);
return true;
} catch (ClassNotFoundException ignore) {
return false;
}
}
public LoggerFactory createInstance() {
try {
return loggerImplClazz.newInstance();
} catch (Exception e) {
throw new XWorkException(e);
}
}
}
}