/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2011, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.selector.servlet;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.selector.ContextJNDISelector;
import ch.qos.logback.classic.selector.ContextSelector;
import ch.qos.logback.classic.util.ContextSelectorStaticBinder;
/**
* A servlet filter that puts the environment dependent LoggerContext in a
* ThreadLocal variable, removing it after the request is processed.
*
* <p>To use it, add the following lines to a web.xml file
*
* <filter>
* <filter-name>LoggerContextFilter</filter-name>
* <filter-class>
* ch.qos.logback.classic.selector.servlet.LoggerContextFilter
* </filter-class>
* </filter>
* <filter-mapping>
* <filter-name>LoggerContextFilter</filter-name>
* <url-pattern>/*</url-pattern>
* </filter-mapping>
*
* @author Sébastien Pennec
*/
public class LoggerContextFilter implements Filter {
public void destroy() {
//do nothing
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
ContextSelector selector = ContextSelectorStaticBinder.getSingleton().getContextSelector();
ContextJNDISelector sel = null;
if (selector instanceof ContextJNDISelector) {
sel = (ContextJNDISelector)selector;
sel.setLocalContext(lc);
}
try {
chain.doFilter(request, response);
} finally {
if (sel != null) {
sel.removeLocalContext();
}
}
}
public void init(FilterConfig arg0) throws ServletException {
//do nothing
}
}