*
     * @param sessionId the session ID to process
     * @return the canonical session ID (portion before first hyphen, or original if no hyphen)
     */
    public String getCanonicalSessionId(final String sessionId) {
        final int idx = sessionId.indexOf('-');
        if (idx >= 0) {
            return sessionId.substring(0, idx);
        }
        return sessionId;
    }

    /**

        assertEquals("session123", crawlingInfoHelper.getCanonicalSessionId("session123-456"));
        assertEquals("web", crawlingInfoHelper.getCanonicalSessionId("web-config-789"));
        assertEquals("", crawlingInfoHelper.getCanonicalSessionId("-suffix"));
        assertEquals("prefix", crawlingInfoHelper.getCanonicalSessionId("prefix-"));

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
        final String sessionId = crawlingInfoHelper.getCanonicalSessionId(responseData.getSessionId());
        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final CrawlingConfig crawlingConfig = getCrawlingConfig(responseData);

        final String contentMeta = contentMetaBuf.toString().trim();

        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
        final String sessionId = crawlingInfoHelper.getCanonicalSessionId(responseData.getSessionId());
        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final Date documentExpires = crawlingInfoHelper.getDocumentExpires(crawlingConfig);