private final IndexUpdateCallback indexUpdateCallback;

        private final DataStoreParams initParamMap;

        protected boolean finished = false;

        protected boolean running = false;

        private DataStore dataStore;

        protected DataCrawlingThread(final DataConfig dataConfig, final IndexUpdateCallback indexUpdateCallback,

    private int executorTerminationTimeout = 300;

    public FileListIndexUpdateCallbackImpl(final IndexUpdateCallback indexUpdateCallback, final CrawlerClientFactory crawlerClientFactory,
            final int nThreads) {
        this.indexUpdateCallback = indexUpdateCallback;
        this.crawlerClientFactory = crawlerClientFactory;
        executor = newFixedThreadPool(nThreads < 1 ? 1 : nThreads);