org.red5.logging.LoggerContextFilter Maven / Gradle / Ivy
/*
* RED5 Open Source Media Server - https://github.com/Red5/
*
* Copyright 2006-2016 by respective authors (see below). All rights reserved.
*
* 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.red5.logging;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.web.context.ConfigurableWebApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.selector.ContextSelector;
/**
* A servlet filter that puts this contexts LoggerContext into a Threadlocal variable.
*
* It removes it after the request is processed.
*
* To use it, add the following lines to a web.xml file
*
*
* <filter>
* <filter-name>LoggerContextFilter</filter-name>
* <filter-class>org.red5.logging.LoggerContextFilter</filter-class>
* </filter>
* <filter-mapping>
* <filter-name>LoggerContextFilter</filter-name>
* <url-pattern>/*</url-pattern>
* </filter-mapping>
*
*
* @author Paul Gregoire ([email protected])
*/
public class LoggerContextFilter implements Filter {
private String contextName;
public void init(FilterConfig config) throws ServletException {
ServletContext servletContext = config.getServletContext();
contextName = servletContext.getContextPath().replaceAll("/", "");
if ("".equals(contextName)) {
contextName = "root";
}
System.out.printf("Filter init: %s%n", contextName);
ConfigurableWebApplicationContext appctx = (ConfigurableWebApplicationContext) servletContext.getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
if (appctx != null) {
System.out.printf("ConfigurableWebApplicationContext is not null in LoggerContextFilter for: %s, this indicates a misconfiguration or load order problem%n", contextName);
}
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
LoggerContext context = (LoggerContext) request.getServletContext().getAttribute(Red5LoggerFactory.LOGGER_CONTEXT_ATTRIBUTE);
// get the selector
ContextSelector selector = Red5LoggerFactory.getContextSelector();
if (context != null) {
// set the thread local ref
((LoggingContextSelector) selector).setLocalContext(context);
} else {
System.err.printf("No context named %s was found%n", contextName);
}
chain.doFilter(request, response);
// remove the thread local ref so that log contexts dont use the wrong contextName
((LoggingContextSelector) selector).removeLocalContext();
}
public void destroy() {
}
}