*/
    public void shutdown() {
        shutdownListener.onShutdown();
    }

    /**
     * Adds a shutdown listener to be notified when the executor is shutting down.
     *
     * @param listener the shutdown listener to add
     */
    public void addShutdownListener(final ShutdownListener listener) {
        shutdownListener = listener;
    }

    /**

import jakarta.servlet.http.HttpSession;

/**
 * QueryHelper is responsible for building and managing OpenSearch queries for Fess search functionality.
 * It handles query construction, role-based access control, boost functions, sorting, and search preferences.
 * This class serves as the central component for translating user search requests into properly formatted
 * OpenSearch queries with appropriate filters and scoring mechanisms.
 */

    }

    /**
     * Compares two SMB files by name
     * @param f1 first file to compare
     * @param f1name name of first file
     * @param f2 second file to compare
     * @return comparison result for sorting
     * @throws IOException if an I/O error occurs
     */
    protected int compareNames(final SmbFile f1, final String f1name, final SmbFile f2) throws IOException {
        if (f1.isDirectory() != f2.isDirectory()) {

     *
     * @param pageNumber Optional page number to display (0-based)
     * @param form The search form containing filter criteria
     * @return HTML response showing the stemmer override list
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {

    }

    /**
     * Compares two SMB files by name.
     * @param f1 first file to compare
     * @param f1name name of first file
     * @param f2 second file to compare
     * @return comparison result for sorting
     * @throws IOException if an I/O error occurs
     */
    protected int compareNames(final SmbFile f1, final String f1name, final SmbFile f2) throws IOException {
        if (f1.isDirectory() != f2.isDirectory()) {

            try {
                // In real implementation: endpointGroup.close();
                log.info("DiSNI RDMA provider shut down");
            } catch (Exception e) {
                log.error("Error shutting down DiSNI", e);
            } finally {
                endpointGroup = null;
                endpoint = null;
                initialized = false;
            }
        }
    }

   * Send a close frame with optional code and reason.
   *
   * @param code Status code as defined by
   *     [Section 7.4 of RFC 6455](http://tools.ietf.org/html/rfc6455#section-7.4) or `0`.
   * @param reason Reason for shutting down or `null`.
   */
  @Throws(IOException::class)
  fun writeClose(
    code: Int,
    reason: ByteString?,
  ) {
    var payload = ByteString.EMPTY
    if (code != 0 || reason != null) {

                    try {
                        this.channelManager.shutdown();
                        this.channelManager = null;
                    } catch (Exception e) {
                        log.debug("Error shutting down channel manager during emergency cleanup", e);
                    }
                }

                if (this.witnessClient != null) {
                    try {

        // even if you set true manually and forget to set false back
        direction.directFrameworkDebug(fessConfig.isFrameworkDebug()); // basically false

        // you can add your own process when your application is booting or closing
        direction.directCurtainBefore(createCurtainBeforeHook());
        direction.directCurtainFinally(createCurtainFinallyHook()); // when destroy

        direction.directSecurity(createSecurityResourceProvider());

          return rest[index - 2];
      }
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**
   * Returns every possible list that can be formed by choosing one element from each of the given
   * lists in order; the "n-ary <a href="http://en.wikipedia.org/wiki/Cartesian_product">Cartesian
   * product</a>" of the lists. For example:
   *
   * {@snippet :