* Number of replicas for the filter index.
     */
    protected int filterReplicas = 1;

    /**
     * Returns the queue index name.
     * @return The queue index name.
     */
    public String getQueueIndex() {
        return queueIndex;
    }

    /**
     * Sets the queue index name.
     * @param queueIndex The queue index name.
     */
    public void setQueueIndex(final String queueIndex) {

     * @param crawlerConfig The crawler configuration.
     */
    public OpenSearchUrlQueueService(final OpenSearchCrawlerConfig crawlerConfig) {
        index = crawlerConfig.getQueueIndex();
        setNumberOfShards(crawlerConfig.getQueueShards());
        setNumberOfReplicas(crawlerConfig.getQueueReplicas());
    }

    /**
     * Creates a new instance of OpenSearchUrlQueueService.