return ComponentUtil.getFessConfig().getIndexDocumentCrawlerQueueNumberOfReplicasAsInteger();
    }

    @Override
    public int getDataReplicas() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerDataNumberOfReplicasAsInteger();
    }

    @Override
    public int getFilterReplicas() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerFilterNumberOfReplicasAsInteger();
    }

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getIndexDocumentCrawlerDataNumberOfReplicasAsInteger();

    /**
     * Get the value for the key 'index.document.crawler.filter.number_of_replicas'. <br>
     * The value is, e.g. 1 <br>