com.hazelcast.logging.Logger Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.logging;
import com.hazelcast.nio.ClassLoaderUtil;
public final class Logger {
private static volatile LoggerFactory loggerFactory;
private static final Object FACTORY_LOCK = new Object();
private Logger() {
}
public static ILogger getLogger(Class clazz) {
return getLogger(clazz.getName());
}
public static ILogger getLogger(String name) {
//noinspection DoubleCheckedLocking
if (loggerFactory == null) {
//noinspection SynchronizationOnStaticField
synchronized (FACTORY_LOCK) {
if (loggerFactory == null) {
String loggerType = System.getProperty("hazelcast.logging.type");
loggerFactory = newLoggerFactory(loggerType);
}
}
}
return loggerFactory.getLogger(name);
}
public static LoggerFactory newLoggerFactory(String loggerType) {
LoggerFactory loggerFactory = null;
String loggerClass = System.getProperty("hazelcast.logging.class");
if (loggerClass != null) {
loggerFactory = loadLoggerFactory(loggerClass);
}
if (loggerFactory == null) {
if (loggerType != null) {
if ("log4j".equals(loggerType)) {
loggerFactory = loadLoggerFactory("com.hazelcast.logging.Log4jFactory");
} else if ("slf4j".equals(loggerType)) {
loggerFactory = loadLoggerFactory("com.hazelcast.logging.Slf4jFactory");
} else if ("jdk".equals(loggerType)) {
loggerFactory = new StandardLoggerFactory();
} else if ("none".equals(loggerType)) {
loggerFactory = new NoLogFactory();
}
}
}
if (loggerFactory == null) {
loggerFactory = new StandardLoggerFactory();
}
return loggerFactory;
}
private static LoggerFactory loadLoggerFactory(String className) {
try {
return ClassLoaderUtil.newInstance(null, className);
} catch (Exception e) {
//since we don't have a logger available, lets log it to the System.err
e.printStackTrace();
return null;
}
}
}