}

    /**
     * Gets the number of replicas for the queue index.
     *
     * @return the number of queue replicas
     */
    @Override
    public int getQueueReplicas() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerQueueNumberOfReplicasAsInteger();
    }

    /**
     * Gets the number of replicas for the data index.
     *