@Override
    public String get() {
        final HttpServletRequest request = httpServletRequestProvider.get();
        if (request != null) {
            final HttpSession httpSession = request.getSession(false);
            if (httpSession != null) {
                return httpSession.getId();
            }
        }

        return null;
    }
@return back the session id without creating a session
stroom-core/src/main/java/stroom/core/servlet/SessionIdProviderImpl.java