@Override
            public int getCrawlingThreadCount() {
                return 1; // Reduced from 2 to minimize thread overhead
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldSegment() {
                return "segment";
            }

            }

            @Override
            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

            final FessConfig fessConfig = ComponentUtil.getFessConfig();
            final BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery()//
                    .must(QueryBuilders.termQuery(fessConfig.getIndexFieldConfigId(), dataConfig.getConfigId()))//
                    .mustNot(QueryBuilders.termQuery(fessConfig.getIndexFieldSegment(), sessionId));
            if (!Constants.FALSE.equals(initParamMap.getAsString(KEEP_EXPIRES_DOCS))) {

            }

            @Override
            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

        }

        // cid
        final String configId = crawlingConfig.getConfigId();
        if (configId != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldConfigId(), configId);
        }
        //  expires
        if (documentExpires != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldExpires(), documentExpires);
        }
        // segment

        }

        // cid
        final String configId = crawlingConfig.getConfigId();
        if (configId != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldConfigId(), configId);
        }
        //  expires
        if (documentExpires != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldExpires(), documentExpires);
        }
        // lang

        final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
        final String configId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldConfigId(), String.class);
        if (configId == null) {
            throw new FessSystemException("configId is null.");
        }
        if (configId.length() < 2) {

     * The value is, e.g. config_id <br>
     * comment: Field name for config ID in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldConfigId();

    /**
     * Get the value for the key 'index.field.expires'. <br>
     * The value is, e.g. expires <br>
     * comment: Field name for expiration date in the index.