org.red5.logging.ContextLoggingListener 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.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.slf4j.Logger;
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 context listener that puts this contexts LoggerContext into a static map of logger contexts within an overall singleton log context selector.
*
* To use it, add the following line to a web.xml file
*
*
* <listener>
* <listener-class>org.red5.logging.ContextLoggingListener</listener-class>
* </listener>
*
*
* @author Paul Gregoire ([email protected])
*/
public class ContextLoggingListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent event) {
ServletContext servletContext = event.getServletContext();
String contextName = servletContext.getContextPath().replaceAll("/", "");
if ("".equals(contextName)) {
contextName = "root";
}
System.out.printf("Context 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 ContextLoggingListener for: %s, this indicates a misconfiguration or load order problem%n", contextName);
}
try {
// get the selector
ContextSelector selector = Red5LoggerFactory.getContextSelector();
// get the logger context for this servlet / app context by name
URL url = servletContext.getResource(String.format("/WEB-INF/classes/logback-%s.xml", contextName));
if (url != null && Files.exists(Paths.get(url.toURI()))) {
System.out.printf("Context logger config found: %s%n", url.toURI());
} else {
url = servletContext.getResource("/WEB-INF/classes/logback.xml");
if (url != null && Files.exists(Paths.get(url.toURI()))) {
System.out.printf("Context logger config found: %s%n", url.toURI());
}
}
// get the logger context for the servlet context
LoggerContext loggerContext = url != null ? ((LoggingContextSelector) selector).getLoggerContext(contextName, url) : selector.getLoggerContext(contextName);
// set the logger context for use elsewhere in the servlet context
servletContext.setAttribute(Red5LoggerFactory.LOGGER_CONTEXT_ATTRIBUTE, loggerContext);
// get the root logger for this context
Logger logger = Red5LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME, contextName);
logger.info("Starting up context: {}", contextName);
} catch (Exception e) {
System.err.printf("LoggingContextSelector is not the correct type: %s%n", e.getMessage());
e.printStackTrace();
}
}
public void contextDestroyed(ServletContextEvent event) {
ServletContext servletContext = event.getServletContext();
LoggerContext context = (LoggerContext) servletContext.getAttribute(Red5LoggerFactory.LOGGER_CONTEXT_ATTRIBUTE);
if (context != null) {
Logger logger = context.getLogger(Logger.ROOT_LOGGER_NAME);
logger.debug("Shutting down context {}", context.getName());
context.reset();
context.stop();
} else {
System.err.printf("No logger context found for %s%n", event.getServletContext().getContextPath());
}
}
}