/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, 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 static ch.qos.logback.classic.ClassicConstants.JNDI_CONTEXT_NAME;
  
  import javax.naming.Context;
  import javax.naming.NamingException;
  import jakarta.servlet.ServletContextEvent;
  import jakarta.servlet.ServletContextListener;
  
  import org.slf4j.Logger;
  
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.selector.ContextSelector;
  import ch.qos.logback.classic.util.ContextSelectorStaticBinder;
  import ch.qos.logback.core.util.JNDIUtil;
  
  public class ContextDetachingSCL implements ServletContextListener {
  
      public void contextInitialized(ServletContextEvent arg0) {
          // do nothing
      }
  
      public void contextDestroyed(ServletContextEvent servletContextEvent) {
          String loggerContextName = null;
  
          try {
              Context ctx = JNDIUtil.getInitialContext();
              loggerContextName = (String) JNDIUtil.lookupString(ctx, JNDI_CONTEXT_NAME);
          } catch (NamingException ne) {
          }
  
          if (loggerContextName != null) {
              System.out.println("About to detach context named " + loggerContextName);
  
              ContextSelector selector = ContextSelectorStaticBinder.getSingleton().getContextSelector();
              if (selector == null) {
                  System.out.println("Selector is null, cannot detach context. Skipping.");
                  return;
              }
              LoggerContext context = selector.getLoggerContext(loggerContextName);
              if (context != null) {
                  Logger logger = context.getLogger(Logger.ROOT_LOGGER_NAME);
                  logger.warn("Stopping logger context " + loggerContextName);
                  selector.detachLoggerContext(loggerContextName);
                  // when the web-app is destroyed, its logger context should be stopped
                  context.stop();
              } else {
                  System.out.println("No context named " + loggerContextName + " was found.");
              }
          }
      }
  
  }