/**
    * 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 chapters.filters;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.slf4j.MDC;
  import org.slf4j.Marker;
  import org.slf4j.MarkerFactory;
  
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.joran.JoranConfigurator;
  import ch.qos.logback.core.joran.spi.JoranException;
  
  public class FilterEvents {
  
      public static void main(String[] args) throws InterruptedException {
          if (args.length == 0) {
              System.out.println("A configuration file must be passed as a parameter.");
              return;
          }
  
          Logger logger = (Logger) LoggerFactory.getLogger(FilterEvents.class);
          LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
  
          try {
              JoranConfigurator configurator = new JoranConfigurator();
              configurator.setContext(lc);
              lc.reset();
              configurator.doConfigure(args[0]);
          } catch (JoranException je) {
              je.printStackTrace();
          }
  
          for (int i = 0; i < 10; i++) {
              if (i == 3) {
                  MDC.put("username", "sebastien");
                  logger.debug("logging statement {}", i);
                  MDC.remove("username");
              } else if (i == 6) {
                  Marker billing = MarkerFactory.getMarker("billing");
                  logger.error(billing, "billing statement {}", i);
              } else {
                  logger.info("logging statement {}", i);
              }
          }
      }
  }