* Deletes all access results for the specified session.
     *
     * @param sessionId the session ID
     */
    @Override
    public void delete(final String sessionId) {
        dataHelper.deleteAccessResultMap(sessionId);
    }

    /**
     * Deletes all access results from all sessions.
     */
    @Override
    public void deleteAll() {
        dataHelper.clearUrlQueueList();
    }

        }
        return arMap;
    }

    /**
     * Deletes the access result map for the specified session ID.
     * @param sessionId the session ID
     */
    public synchronized void deleteAccessResultMap(final String sessionId) {
        sessionMap.remove(sessionId);
    }

    /**
     * Deletes all access result maps for all sessions.
     */
    public synchronized void deleteAllAccessResultMap() {