String INDEXER_LANGUAGE_DETECT_LENGTH = "indexer.language.detect.length";

    /** The key of the configuration. e.g. 10000 */
    String INDEXER_MAX_RESULT_WINDOW_SIZE = "indexer.max.result.window.size";

    /** The key of the configuration. e.g. 50000 */
    String INDEXER_MAX_SEARCH_DOC_SIZE = "indexer.max.search.doc.size";

    /** The key of the configuration. e.g. default */

    public static final String LTR_MODEL_NAME_PROPERTY = "ltr.model.name";

    public static final String LTR_WINDOW_SIZE_PROPERTY = "ltr.window.size";

    public static final String SSO_TYPE_PROPERTY = "sso.type";

    public static final String REQUEST_QUERIES = "fess.Queries";

        final int windowSize = fessConfig.getRankFusionWindowSizeAsInteger();
        if (maxPageSize * 2 < windowSize) {
            logger.warn("rank.fusion.window_size is lower than paging.search.page.max.size. "
                    + "The window size should be 2x more than the page size. ({} * 2 <= {})", maxPageSize, windowSize);
            this.windowSize = 2 * maxPageSize;
        } else {

indexer.data.max.document.request.size=1048576
indexer.data.max.delete.cache.size=100
indexer.data.max.redirect.count=10
indexer.language.fields=content,important_content,title
indexer.language.detect.length=1000
indexer.max.result.window.size=10000
indexer.max.search.doc.size=50000

# index setting
index.codec=default
index.number_of_shards=5
index.auto_expand_replicas=0-1
index.id.digest.algorithm=SHA-512
index.user.initial_password=admin

public class AccessTokenHelper {

    protected static final String BEARER = "Bearer";

    protected Random random = new SecureRandom();

    public String generateAccessToken() {
        return RandomStringUtils.random(ComponentUtil.getFessConfig().getApiAccessTokenLengthAsInteger(), 0, 0, true, true, null, random);
    }

    public String getAccessTokenFromRequest(final HttpServletRequest request) {

    private static final byte[] DEFAULT_ADDRESS = new byte[] { (byte) 127, (byte) 0, (byte) 0, (byte) 1 };

    private static final SecureRandom RANDOM = new SecureRandom();

    private static final String BASE = StringUtil.toHex(getAddress()) + StringUtil.toHex(System.identityHashCode(RANDOM));

    /**
     * UUIDを作成します。
     *
     * @return UUIDの文字列
     */
    public static String create() {

    }

    default void setLtrWindowSize(final int value) {
        setSystemPropertyAsInt(Constants.LTR_WINDOW_SIZE_PROPERTY, value);
    }

    default int getLtrWindowSize() {
        return getSystemPropertyAsInt(Constants.LTR_WINDOW_SIZE_PROPERTY, 100);
    }

    default String[] getAzureAdPermissionFields() {