/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* 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 org.apache.log4j.selector.servlet;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.apache.log4j.helpers.Constants;
import org.apache.log4j.helpers.JNDIUtil;
import org.apache.log4j.spi.LoggerRepository;
import org.apache.log4j.spi.RepositorySelector;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
// WARNING
// WARNING Since ServletContextListener gets instantiated by the application
// WARNING server, we have no way of passing it a LoggerRepository instance.
// WARNING It follows that this class should not log except when an LR instance
// WARNING is available.
/**
* This is a very simple ServletContextListener which detaches a
* {@link LoggerRepository} from {@link ContextJNDISlector} when the
* web-application is destroyed.
*
* <p>This class is highly coupled with JNDI but not necessarily
* ContextJNDISlector.
*
* @author Ceki Gülcü
* @since 1.3
*/
public class ContextDetachingSCL implements ServletContextListener {
/**
* When the context is destroy, detach the logging repository given by
* the value of "log4j/context-name" environment variable.
*
* If found, the logging repository is also shutdown.
*/
public void contextDestroyed(ServletContextEvent sce) {
String loggingContextName = null;
try {
Context ctx = JNDIUtil.getInitialContext();
loggingContextName =
(String) JNDIUtil.lookup(ctx, Constants.JNDI_CONTEXT_NAME);
} catch (NamingException ne) {
}
if (loggingContextName != null) {
System.out.println(
"About to detach logger context named [" + loggingContextName + "].");
RepositorySelector repositorySelector =
LogManager.getRepositorySelector();
LoggerRepository lr = repositorySelector.detachRepository(loggingContextName);
if(lr != null) {
Logger logger = lr.getLogger(this.getClass().getName());
logger.debug("About to shutdown logger repository named [{}]", lr.getName());
lr.shutdown();
}
}
}
/**
* Does nothing.
*/
public void contextInitialized(ServletContextEvent sce) {
}
}