/** OpenSearch client. */
    protected final Client client;
    /** Analyzer settings index name. */
    protected final String analyzerSettingsIndexName;
    private final SuggestSettings settings;

    /** Analyzer map. */
    protected static Map<String, Set<String>> analyzerMap = new ConcurrentHashMap<>();
    /** Field analyzer mapping map. */

    }

    /** Header name for location redirects. */
    protected static final String LOCATION_HEADER = "Location";

    /** The crawler container for dependency injection. */
    @Resource
    protected CrawlerContainer crawlerContainer;

    /** Map of parser features to configure the DOM parser. */
    protected Map<String, String> featureMap = new HashMap<>();

     * directory.
     */
    protected String path;

    /**
     * A string to replace ?.
     */
    protected String questionStr = "_QUEST_";

    /**
     * A string to replace :.
     */
    protected String colonStr = "_CLN_";

    /**
     * A string to replace ;.
     */
    protected String semicolonStr = "_SCLN_";

    /**
     * A string to replace &.

    /** The encoding for the output. */
    protected String outputEncoding = Constants.UTF_8;

    /** The extension for the output file. */
    protected String outputExtension = null;

    /** The temporary directory for input/output files. */
    protected File tempDir = null;

    /** The command to execute. */
    protected String command;

    /** The timeout for command execution in milliseconds. */

    /**
     * Data service for checking access results.
     */
    @Resource
    protected OpenSearchDataService dataService;

    /**
     * Cache for session queues.
     */
    protected Map<String, QueueHolder> sessionCache = new ConcurrentHashMap<>();

    /**
     * The number of URLs to fetch when polling.
     */
    protected int pollingFetchSize = 1000;

    /**
     * The maximum size of the crawling queue.

    /** The OpenSearch client. */
    protected final Client client;
    /** The suggest settings. */
    protected final SuggestSettings suggestSettings;
    /** The reading converter. */
    protected final ReadingConverter readingConverter;
    /** The contents reading converter. */
    protected final ReadingConverter contentsReadingConverter;
    /** The normalizer. */
    protected final Normalizer normalizer;

    /**
     * Connection timeout in milliseconds.
     */
    protected long connTimeout = 180 * 1000L;

    /**
     * Search preference.
     */
    protected String searchPreference;

    /**
     * Target indices.
     */
    protected String[] targetIndices;

    /**
     * Creates a new instance of FesenClient.

    protected boolean includeAware;

    /**
     * A map of attributes.
     */
    protected final Map<String, Object> attributeMap = new HashMap<>();

    /**
     * A map of features.
     */
    protected final Map<String, String> featureMap = new HashMap<>();

    /**
     * A map of field rules.
     */
    protected Map<String, String> fieldRuleMap = new LinkedHashMap<>();

     * Field name for ID.
     */
    protected static final String ID = "id";

    /**
     * Field name for session ID.
     */
    protected static final String SESSION_ID = "sessionId";

    /**
     * Field name for URL.
     */
    protected static final String URL = "url";

    /**
     * Field name for last modified timestamp.
     */
    protected static final String LAST_MODIFIED = "lastModified";

    protected Map<String, String> propertyMap = new HashMap<>();

    /** XPath expression to select target nodes for text extraction. */
    protected String targetNodePath = "//HTML/BODY | //@alt | //@title";

    /** Cache for XPathAPI instances to improve performance. */
    protected LoadingCache<String, XPathAPI> xpathAPICache;

    /** Cache duration in minutes for XPathAPI instances. */
    protected long cacheDuration = 10; // min