public synchronized void init() {
        if (ftpAuthenticationHolder != null) {
            return;
        }

        super.init();

        final String systemKey = getInitParameter("ftpConfigSystemKey", FTPClientConfig.SYST_UNIX, String.class);
        ftpClientConfig = new FTPClientConfig(systemKey);

        final String serverLanguageCode = getInitParameter("ftpConfigServerLanguageCode", "en", String.class);