/*
* Copyright (c) 2004-2005 SLF4J.ORG
* Copyright (c) 2004-2005 QOS.ch
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
* SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
*
*/
package org.slf4j.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.LogFactory;
import org.slf4j.ILoggerFactory;
import org.slf4j.Logger;
import org.slf4j.helpers.Util;
/**
* JCLLoggerFactory is an implementation of {@link ILoggerFactory} returning the
* appropriately named {@link JCLLoggerAdapter} instance.
*
* @author Ceki Gülcü
*/
public class JCLLoggerFactory implements ILoggerFactory {
private static final String JCL_DELEGATION_LOOP_URL = "http://www.slf4j.org/codes.html#jclDelegationLoop";
// check for delegation loops
static {
try {
Class.forName("org.apache.commons.logging.impl.SLF4JLogFactory");
String part1 = "Detected both jcl-over-slf4j.jar AND slf4j-jcl.jar on the class path, preempting StackOverflowError. ";
String part2 = "See also " + JCL_DELEGATION_LOOP_URL
+ " for more details.";
Util.report(part1);
Util.report(part2);
throw new IllegalStateException(part1 + part2);
} catch (ClassNotFoundException e) {
// this is the good case
}
}
// key: name (String), value: a JCLLoggerAdapter;
Map loggerMap;
public JCLLoggerFactory() {
loggerMap = new HashMap();
}
/*
* (non-Javadoc)
*
* @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
*/
public Logger getLogger(String name) {
Logger logger = null;
// protect against concurrent access of loggerMap
synchronized (this) {
logger = (Logger) loggerMap.get(name);
if (logger == null) {
org.apache.commons.logging.Log jclLogger = LogFactory.getLog(name);
logger = new JCLLoggerAdapter(jclLogger, name);
loggerMap.put(name, logger);
}
}
return logger;
}
}