*/
public class LdapManager {
    private static final Logger logger = LogManager.getLogger(LdapManager.class);

    /** A thread-local variable to hold the directory context. */
    protected ThreadLocal<DirContextHolder> contextLocal = new ThreadLocal<>();

    /** A flag to indicate if the LDAP connection is bound. */
    protected volatile boolean isBind = false;

    /** The Fess configuration. */
    protected FessConfig fessConfig;

    }

    /** Thread-local SimpleDateFormat for parsing non-standard date formats */
    private static final ThreadLocal<SimpleDateFormat> DATE_FORMAT_HOLDER =
            ThreadLocal.withInitial(() -> new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z", Locale.ENGLISH));

    /**
     * Parses the last modified date from a string value.

    }

    /** Thread-local SimpleDateFormat for parsing non-standard date formats */
    private static final ThreadLocal<SimpleDateFormat> DATE_FORMAT_HOLDER =
            ThreadLocal.withInitial(() -> new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z", Locale.ENGLISH));

    /** RFC 1123 date formatter */
    private static final DateTimeFormatter RFC_1123_FORMATTER =