if (responseData.getContentLength() > 0
                    && responseData.getContentLength() <= fessConfig.getCrawlerDocumentCacheMaxSizeAsInteger().longValue()) {
                String charSet = responseData.getCharSet();
                if (charSet == null) {
                    charSet = Constants.UTF_8;
                }

            if (responseData.getContentLength() > 0
                    && responseData.getContentLength() <= fessConfig.getCrawlerDocumentCacheMaxSizeAsInteger().longValue()) {

                final String cache = content.trim().replaceAll("[ \\t\\x0B\\f]+", " ");

                // text cache

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getCrawlerDocumentCacheMaxSizeAsInteger();

    /**
     * Get the value for the key 'crawler.document.cache.supported.mimetypes'. <br>
     * The value is, e.g. text/html <br>
     * comment: Supported MIME types for document cache.