this.client = client;
        this.settings = settings;
        this.indexName = indexName;
        supportedFields = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS);
        totalDocNum = getTotal();
    }

    @Override
    public synchronized Map<String, Object> read() {
        while (!isFinished.get() && queue.isEmpty()) {

    public SuggestIndexer setIndexName(final String index) {
        this.index = index;
        return this;
    }

    public SuggestIndexer setSupportedFields(final String[] supportedFields) {
        this.supportedFields = supportedFields;
        return this;
    }

    public SuggestIndexer setTagFieldNames(final String[] tagFieldNames) {
        this.tagFieldNames = tagFieldNames;
        return this;
    }

        return new SuggestSettingsBuilder();
    }

    public static class DefaultKeys {
        public static final String INDEX = "index";
        public static final String SUPPORTED_FIELDS = "supportedFields";
        public static final String TAG_FIELD_NAME = "tagFieldName";
        public static final String ROLE_FIELD_NAME = "roleFieldName";
        public static final String LANG_FIELD_NAME = "langFieldName";

        try {
            suggester.settings().array().delete(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS);
            split(fessConfig.getSuggestFieldIndexContents(), ",").of(stream -> stream.filter(StringUtil::isNotBlank).forEach(field -> {
                try {
                    suggester.settings().array().add(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS, field);
                } catch (final SuggestSettingsException e) {