public static  void main(String[] args) 
{
    
    Logger root = Logger.getRootLogger();
    Logger cat = Logger.getLogger(Loop.class.getName());
    if(args.length != 2) 
      usage("Wrong number of arguments.");     
    String host = args[0];
    int port = 0;
    try {
      port = Integer.valueOf(args[1]).intValue();
    }
    catch (NumberFormatException e) {
        usage("Argument [" + args[1]  + "] is not in proper int form.");
    }
    SocketAppender sa = new SocketAppender(host, port);
    Layout layout = new PatternLayout("%5p [%t] %x %c - %m\n");
    Appender so = new ConsoleAppender(layout, "System.out");
    root.addAppender(sa);
    root.addAppender(so);
    int i = 0;
    while(true) {
      NDC.push(""+ (i++));
      cat.debug("Debug message.");
      root.info("Info message.");
      NDC.pop();
    }
}

 static  void usage(String msg) 
{
    System.err.println(msg);
    System.err.println(
      "Usage: java " +Loop.class.getName() + " host port");
    System.exit(1);
}