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/**
* Copyright (c) 2004-2011 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, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
package org.slf4j.impl;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
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;
ConcurrentMap<String, Logger> loggerMap;
public JCLLoggerFactory() {
loggerMap = new ConcurrentHashMap<String, Logger>();
}
/*
* (non-Javadoc)
*
* @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
*/
public Logger getLogger(String name) {
Logger slf4jLogger = loggerMap.get(name);
if (slf4jLogger != null) {
return slf4jLogger;
} else {
org.apache.commons.logging.Log jclLogger = LogFactory.getLog(name);
Logger newInstance = new JCLLoggerAdapter(jclLogger, name);
Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
return oldInstance == null ? newInstance : oldInstance;
}
}
}
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