org.openmdx.kernel.log.LoggerFactory Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: openMDX Logger Factory
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.kernel.log;
import java.util.Collection;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.logging.Logger;
/**
* openMDX Logger Factory
*/
public class LoggerFactory {
/**
* The openMDX logger name
*/
public static final String STANDARD_LOGGER_NAME = "org.openmdx.kernel.log.LoggerFactory";
/**
* The openMDX logger singleton
*/
private static final Map loggers = new WeakHashMap();
/**
* The version information is logged lazily
*/
private static volatile boolean logVersion = true;
/**
* Retrieve the openMDX logger
*
* @return the openMDX logger
*/
public static final Logger getLogger(
){
ClassLoader cl = Thread.currentThread().getContextClassLoader();
Logger logger = loggers.get(cl);
if(logger == null) {
synchronized(loggers) {
loggers.put(
cl,
logger = Logger.getLogger(STANDARD_LOGGER_NAME)
);
}
if(logVersion) {
// No synchronization necessary as Logging the version twice wouldn't hurt
logVersion = false;
SysLog.info("openMDX base implementation version", org.openmdx.base.Version.getImplementationVersion());
}
}
return logger;
}
public static Collection getLoggers(
) {
return loggers.values();
}
}