/**
    * 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.appenders.mail;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.joran.JoranConfigurator;
  import ch.qos.logback.core.util.StatusPrinter;
  
  /**
   * This application generates log messages in numbers specified by the
   * user. 
   * */
  public class EMail {
      static public void main(String[] args) throws Exception {
          if (args.length != 2) {
              usage("Wrong number of arguments.");
          }
  
          int runLength = Integer.parseInt(args[0]);
          String configFile = args[1];
  
          LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
          JoranConfigurator configurator = new JoranConfigurator();
          lc.reset();
          configurator.setContext(lc);
          configurator.doConfigure(configFile);
  
          Logger logger = LoggerFactory.getLogger(EMail.class);
  
          for (int i = 1; i <= runLength; i++) {
              if ((i % 10) < 9) {
                  logger.debug("This is a debug message. Message number: " + i);
              } else {
                  logger.warn("This is a warning message. Message number: " + i);
              }
          }
  
          logger.error("At last an error.", new Exception("Just testing"));
          
          lc.stop();
          
          StatusPrinter.printInCaseOfErrorsOrWarnings(lc);
      }
  
      static void usage(String msg) {
          System.err.println(msg);
          System.err.println("Usage: java " + EMail.class.getName() + " runLength configFile\n" + "   runLength (integer) the number of logs to generate\n"
                          + "   configFile a logback configuration file in XML format." + " XML files must have a '.xml' extension.");
          System.exit(1);
      }
  }