/** Configuration path property key. */
    public static final String FESS_CONF_PATH = "fess.conf.path";

    /** UTC timezone constant. */
    public static final TimeZone TIMEZONE_UTC = TimeZone.getTimeZone("UTC");

    // ============================================================
    // LDAP Configuration Constants
    // ============================================================

    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", this.getClass().getSimpleName());
        }
        final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
        cal.set(2027, 6 - 1, 1); // EOL Date
        eolTime = cal.getTimeInMillis();
        if (isEoled()) {
            logger.error("Your system is out of support. See https://fess.codelibs.org/eol.html");

    val servedDate = Date(System.currentTimeMillis() + TimeUnit.HOURS.toMillis(-2))
    val dateFormat: DateFormat = SimpleDateFormat("EEE dd-MMM-yyyy HH:mm:ss z", Locale.US)
    dateFormat.timeZone = TimeZone.getTimeZone("America/New_York")
    val lastModifiedString = dateFormat.format(lastModifiedDate)
    val servedString = dateFormat.format(servedDate)

    // This response should be conditionally cached.
    server.enqueue(