setUpChild();
    }

    /**
     * Override this method in child classes to perform additional setup
     */
    protected void setUpChild() throws Exception {
        // Default implementation does nothing
    }

    /**
     * Creates and registers a properly initialized FessConfig
     */
    protected void setupBaseFessConfig() {
        ComponentUtil.setFessConfig(createBaseFessConfig());
    }

    /**

    /*
     * Since we use AtomicReferenceFieldUpdaterAtomicHelper by default, we'll "obviously" use it
     * even when Unsafe isn't available. But it's nice to have a check here to make sure that
     * nothing somehow goes wrong as the JDK restricts access to Unsafe.
     */
    checkHelperVersion(NO_UNSAFE, "AtomicReferenceFieldUpdaterAtomicHelper");
    /*

      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

// inspection to understand the root cause. E.g, this could be due to
// backend filesystem corruption.

// listOnlineDisks - returns
// - a slice of disks where disk having 'older' xl.meta (or nothing)
// are set to nil.
// - latest (in time) of the maximally occurring modTime(s), which has at least quorum occurrences.

    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()) {

    /**
     * An item of a label type.
     */
    protected static class LabelTypeItem {
        /**
         * Default constructor.
         */
        public LabelTypeItem() {
            // do nothing
        }

        private String label;

        private String value;

        private String[] permissions;

        private String virtualHost;

        private Locale locale;

        // Spy on the connection to verify handshake() is called
        NtlmHttpURLConnection spiedConnection = spy(ntlmConnection);
        doNothing().when(spiedConnection).connect();
        // Mock the handshake process to do nothing complex
        mockResponse(HTTP_OK, "OK", null, null);

        // Act & Assert
        assertDoesNotThrow(() -> spiedConnection.getResponseCode());
        // Use reflection to verify handshake method is called

     * been observed yet.
     */
    void markReady() {
      monitor.enter();
      try {
        if (!transitioned) {
          // nothing has transitioned since construction, good.
          ready = true;
        } else {
          // This should be an extremely rare race condition.
          List<Service> servicesInBadStates = new ArrayList<>();

      this.future = future;
    }

    @Override
    public void run() {
      try {
        future.get();
      } catch (Exception e) {
        // nothing
      }
    }

    @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
    void awaitWaiting() {
      while (!isBlocked()) {

    /**
     * Protected constructor to prevent instantiation of this utility class.
     * This class is designed to be used statically.
     */
    protected ResourceUtil() {
        // nothing
    }

    /**
     * Gets the HTTP URL for the OpenSearch (Fesen) server.
     * First checks for a system-configured search engine address,
     * then falls back to the URL configured in FessConfig.
     *