/*
* Copyright (C) 2014 Glyptodon LLC
*
* 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.glyptodon.guacamole.net.basic.log;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.util.StatusPrinter;
import java.io.File;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.glyptodon.guacamole.properties.GuacamoleHome;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Initializes the logback logging subsystem, used behind SLF4J within
* Guacamole for all logging.
*
* @author Michael Jumper
*/
public class LogbackInitializer implements ServletContextListener {
/**
* Logger for this class.
*/
private final Logger logger = LoggerFactory.getLogger(LogbackInitializer.class);
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
@Override
public void contextInitialized(ServletContextEvent sce) {
// Only load logback configuration if GUACAMOLE_HOME exists
File guacamoleHome = GuacamoleHome.getDirectory();
if (!guacamoleHome.isDirectory())
return;
// Check for custom logback.xml
File logbackConfiguration = new File(guacamoleHome, "logback.xml");
if (!logbackConfiguration.exists())
return;
logger.info("Loading logback configuration from \"{}\".", logbackConfiguration);
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
context.reset();
try {
// Initialize logback
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(context);
configurator.doConfigure(logbackConfiguration);
// Dump any errors that occur during logback init
StatusPrinter.printInCaseOfErrorsOrWarnings(context);
}
catch (JoranException e) {
logger.error("Initialization of logback failed: {}", e.getMessage());
logger.debug("Unable to load logback configuration..", e);
}
}
}