this.cacheFileSize = cacheFileSize;
        return this;
    }

    public ExtractData extract() {
        final ExtractorFactory extractorFactory = crawlerContainer.getComponent("extractorFactory");

        DeferredFileOutputStream dfos = null;
        try (DeferredFileOutputStream out = new DeferredFileOutputStream(cacheFileSize, "fess-extractor-", ".out", null)) {