protected static String readInputCommadForServer(BufferedReader commandReader) {
		String commandLine = null;
		do {
			try {
				commandLine = commandReader.readLine();
				log.info("receive command: " + commandLine);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				//e.printStackTrace();
				commandLine = null;
				log.info("receive command: FAIL");
			}
		} while (commandLine == null);
		return commandLine;
	}