super();
    }

    /**
     * Gets the name of the queue index for the crawler.
     *
     * @return the queue index name
     */
    @Override
    public String getQueueIndex() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerIndex() + ".queue";
    }

    /**
     * Gets the name of the data index for the crawler.
     *
     * @return the data index name

     * 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) {