@Override
    public int getCount(final String sessionId) {
        return dataHelper.getAccessResultMap(sessionId).size();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.service.DataService#delete(java.lang.String)
     */
    @Override
    public void delete(final String sessionId) {
        dataHelper.deleteAccessResultMap(sessionId);
    }

    /*
     * (non-Javadoc)
     *

            if (Constants.FALSE.equals(initParamMap.getAsString(DELETE_OLD_DOCS))) {
                return;
            }
            final String sessionId = initParamMap.getAsString(Constants.SESSION_ID);
            if (StringUtil.isBlank(sessionId)) {
                logger.warn("Invalid sessionId at {}", dataConfig);
                return;
            }
            final FessConfig fessConfig = ComponentUtil.getFessConfig();

    public void setSessionId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setSessionId_Terms("sessionId", opLambda, null);
    }

    public void setSessionId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsCrawlingInfoCA> aggsLambda) {
        setSessionId_Terms("sessionId", opLambda, aggsLambda);
    }

    void addIncludeUrlFilter(String sessionId, String url);

    void addIncludeUrlFilter(String sessionId, List<String> urlList);

    void addExcludeUrlFilter(String sessionId, String url);

    void addExcludeUrlFilter(String sessionId, List<String> urlList);

    void delete(String sessionId);

    void deleteAll();

    List<Pattern> getIncludeUrlPatternList(String sessionId);

     */
    @Override
    public String getSessionId() {
        return sessionId;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#setSessionId(java.lang.String)
     */
    @Override
    public void setSessionId(final String sessionId) {
        this.sessionId = sessionId;
    }

    /*
     * (non-Javadoc)
     *

    void update(List<RESULT> accessResult);

    int getCount(String sessionId);

    void delete(String sessionId);

    void deleteAll();

    RESULT getAccessResult(String sessionId, String url);

    List<RESULT> getAccessResultList(String url, boolean hasData);

    void iterate(String sessionId, final AccessResultCallback<RESULT> accessResultCallback);

            crawler2.getCrawlerContext().setNumOfThread(numOfThread);

            final String sessionId1 = crawler1.execute();
            final String sessionId2 = crawler2.execute();

            assertNotSame(sessionId1, sessionId2);
            assertNotSame(crawler1.crawlerContext, crawler2.crawlerContext);

            for (int i = 0; i < 10; i++) {

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

    /** a max count to access urls. 0 is no limit to access it. */
    protected long maxAccessCount = 0;

    public String getSessionId() {
        return sessionId;
    }

    public void setSessionId(final String sessionId) {
        this.sessionId = sessionId;
    }

    public Integer getActiveThreadCount() {
        return activeThreadCount;
    }