this.exportPath = exportPath;
            this.excludeFields = excludeFields;
            this.scrollSize = scrollSize;
        }

        @Override
        public String getIndexExportPath() {
            return exportPath;
        }

        @Override
        public String getIndexExportExcludeFields() {
            return excludeFields;
        }

        @Override

        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        final StringBuilder resultBuf = new StringBuilder();

        final String exportPath = fessConfig.getIndexExportPath();
        final Set<String> excludeFields = Arrays.stream(fessConfig.getIndexExportExcludeFields().split(","))
                .map(String::trim)
                .filter(s -> !s.isEmpty())

     * The value is, e.g. /var/lib/fess/export <br>
     * comment: Index Export
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexExportPath();

    /**
     * Get the value for the key 'index.export.exclude.fields'. <br>
     * The value is, e.g. cache <br>