if (logger.isDebugEnabled()) {
            logger.debug("Registering searcher: {}", searcher.getClass().getSimpleName());
        }
        searchers.add(searcher);
        synchronized (this) {
            if (executorService == null) {
                int numThreads = ComponentUtil.getFessConfig().getRankFusionThreadsAsInteger();
                if (numThreads <= 0) {

            case 2:
                md4.update(ntHash);
                md4.digest(dest, offset, 16);
                break;
            case 3:
            case 4:
            case 5:
                synchronized (this) {
                    if (this.clientChallenge == null) {
                        this.clientChallenge = new byte[8];
                        tc.getConfig().getRandom().nextBytes(this.clientChallenge);

     */
    public void flushActiveProxy() {
        this.activeProxy = null;
    }

    /**
     * @return the first active proxy
     */
    public synchronized Proxy getActiveProxy() {
        if (activeProxy == null) {
            java.util.List<Proxy> proxies = getProxies();
            if (proxies != null && !proxies.isEmpty()) {
                for (Proxy proxy : proxies) {

   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is safe to use even when {@code sortedMultiset} is a synchronized or concurrent
   * collection that is currently being modified by another thread.
   *
   * @throws NullPointerException if {@code sortedMultiset} or any of its elements is null
   */

        }

        synchronized void write(final byte[] b, final int n, final SmbFile dest, final long off) {
            this.b = b;
            this.n = n;
            this.dest = dest;
            this.off = off;
            ready = false;
            notify();
        }

        @Override
        public void run() {
            synchronized (this) {
                try {

        postWriteCleanup();
      }

      if (createNewEntry) {
        try {
          // Synchronizes on the entry to allow failing fast when a recursive load is
          // detected. This may be circumvented when an entry is copied, but will fail fast most
          // of the time.
          synchronized (e) {
            return loadSync(key, hash, loadingValueReference, loader);
          }
        } finally {

  public static final byte NAK = 21;

  /**
   * Synchronous Idle: A communication control character used by a synchronous transmission system
   * in the absence of any other character to provide a signal from which synchronism may be
   * achieved or retained.
   *
   * @since 8.0
   */
  public static final byte SYN = 22;

  /**
   * End of Transmission Block: A communication control character used to indicate the end of a

     * Returns the FesenClient instance, connecting if not already connected.
     * @return The FesenClient instance.
     */
    protected FesenClient getClient() {
        if (!fesenClient.connected()) {
            synchronized (fesenClient) {
                if (!fesenClient.connected()) {
                    fesenClient.connect();
                }
            }
        }
        return fesenClient;
    }

    /**

     */
    protected String trustManager;

    /**
     * Whether to enter local passive mode.
     */
    protected boolean enterLocalPassiveMode;

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

        super.init();

   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is safe to use even when {@code sortedMultiset} is a synchronized or concurrent
   * collection that is currently being modified by another thread.
   *
   * @throws NullPointerException if {@code sortedMultiset} or any of its elements is null
   */