protected volatile boolean isBind = false;

    /** The Fess configuration. */
    protected FessConfig fessConfig;

    /**
     * Default constructor.
     */
    public LdapManager() {
        // do nothing
    }

    /**
     * Initializes the LDAP manager.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

                if (value instanceof String[]) {
                    value = Arrays.stream((String[]) value).toList();
                } else if (value instanceof List<?>) {
                    // nothing
                } else {
                    value = split(value.toString(), "\n")
                            .get(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).collect(Collectors.toList()));

                        logger.warn("Failed to decode url: url={}", url, e);
                    }
                }
            }
        }
        // http, ftp
        // nothing

        return appendQueryParameter(document, url);
    }

    /**
     * Updates file protocol based on user agent type.
     * Handles different browser-specific file protocol formats.
     *

                } else if (last == null) {
                    // don't have enough credits/space for the first request, block until available
                    // for space there is nothing we can do, callers need to make sure that a single message fits

                    try {
                        final long timeout = getResponseTimeout(chain);