code: public String execute(String clientID, String name, long time, Level level,
  	        Object message, Throwable throwable){
  
  		StringBuilder sb = new StringBuilder();
  		if (throwable != null) {
  			sb.append(throwable.toString());
  			String newline = System.getProperty("line.separator");
  			StackTraceElement[] stackTrace = throwable.getStackTrace();
  			for (int i = 0; i < stackTrace.length; i++) {
  				StackTraceElement element = stackTrace[i];
  				sb.append(newline);
  				sb.append("\tat ");
  				sb.append(element.toString());
  			}
  		}
  
  		return sb.toString();
  	}
docs: Set the log data.
  
  @see FormatCommandInterface#execute(String, String, long, Level, Object,
  Throwable)