private final LongAddable loadExceptionCount = LongAddables.create();
    private final LongAddable totalLoadTime = LongAddables.create();
    private final LongAddable evictionCount = LongAddables.create();

    /** Constructs an instance with all counts initialized to zero. */
    public SimpleStatsCounter() {}

    /**
     * @since 11.0
     */
    @Override
    public void recordHits(int count) {
      hitCount.add(count);

    protected static final String KRYO = "kryo";

    /** ThreadLocal container for Kryo instances to ensure thread safety. */
    protected final ThreadLocal<Kryo> kryoThreadLocal;

    /**
     * Constructs a new DataSerializer.
     * <p>
     * Initializes the ThreadLocal Kryo instances with appropriate configuration.
     * The Kryo instances are configured to require class registration for security,

  int concurrencyLevel = UNSET_INT;

  @Nullable Strength keyStrength;
  @Nullable Strength valueStrength;

  @Nullable Equivalence<Object> keyEquivalence;

  /**
   * Constructs a new {@code MapMaker} instance with default settings, including strong keys, strong
   * values, and no automatic eviction of any kind.
   */
  public MapMaker() {}

  /**

      Comparator<? super K> keyComparator, Comparator<? super V> valueComparator) {
    return new TreeMultimap<>(checkNotNull(keyComparator), checkNotNull(valueComparator));
  }

  /**
   * Constructs a {@code TreeMultimap}, ordered by the natural ordering of its keys and values, with
   * the same mappings as the specified multimap.
   *
   * @param multimap the multimap whose contents are copied to this multimap
   */

    private static final String JAVA_IO_TMPDIR = "java.io.tmpdir";

    /** System property key for Tomcat configuration path */
    private static final String TOMCAT_CONFIG_PATH = "tomcat.config.path";

    /**
     * Constructs a new FessBoot instance with the specified port and context path.
     *
     * @param port the port number for the Tomcat server
     * @param contextPath the context path for the web application
     */

    private String userRealm;
    private String userPrincipalName;
    private ArrayList<InetAddress> userAddresses;
    private List<KerberosAuthData> userAuthorizations;

    /**
     * Constructs KerberosEncData from encrypted token bytes.
     *
     * @param token the encrypted Kerberos token
     * @param keys map of encryption keys indexed by key type
     * @throws PACDecodingException if decoding fails
     */

     */
    public static <KEY, VALUE> Maps<KEY, VALUE> weakHashMap(final KEY key, final VALUE value) {
        return new Maps<>(new WeakHashMap<KEY, VALUE>()).$(key, value);
    }

    /**
     * Constructs an instance.
     *
     * @param map the <code>Map</code> to which keys and values are added
     */
    protected Maps(final Map<K, V> map) {
        this.map = map;
    }

    /**

    private final ExecutorService executor;

    /** Timeout in seconds for executor service termination during shutdown. */
    private int executorTerminationTimeout = 300;

    /**
     * Constructs a new FileListIndexUpdateCallbackImpl with the specified parameters.
     *
     * @param indexUpdateCallback the underlying index update callback to delegate to

            map.put(crawlingInfoParam.getKey(), crawlingInfoParam.getValue());
        }
        return map;
    }

    /**
     * Generates a unique document ID from the provided data map.
     * Constructs an ID string from URL, roles, and virtual hosts, then generates a hash.
     *
     * @param dataMap the document data map containing URL, roles, and virtual host information

  private transient int metadata;

  /** The number of elements contained in the set. */
  private transient int size;

  /** Constructs a new empty instance of {@code CompactHashSet}. */
  CompactHashSet() {
    init(CompactHashing.DEFAULT_SIZE);
  }

  /**
   * Constructs a new instance of {@code CompactHashSet} with the specified capacity.
   *