def check(self, check_req):
        """Process a check_request.

        The req is first passed to the check_aggregator.  If there is a valid
        cached response, that is returned, otherwise a response is obtained from
        the transport.

        Args:
          check_req (``ServicecontrolServicesCheckRequest``): to be sent to
            the service control service

        Returns:
           ``CheckResponse``: either the cached response if one is applicable
            or a response from making a transport request, or None if
            if the request to the transport fails

        """

        self.start()
        res = self._check_aggregator.check(check_req)
        if res:
            _logger.debug(u'using cached check response for %s: %s',
                          check_request, res)
            return res

        # Application code should not fail because check request's don't
        # complete, They should fail open, so here simply log the error and
        # return None to indicate that no response was obtained
        try:
            transport = self._create_transport()
            resp = transport.services.Check(check_req)
            self._check_aggregator.add_response(check_req, resp)
            return resp
        except exceptions.Error:  # only sink apitools errors
            _logger.error(u'direct send of check request failed %s',
                          check_request, exc_info=True)
            return None
def check ( self , check_req ) : self . start ( ) res = self . _check_aggregator . check ( check_req ) if res : _logger . debug ( u'using cached check response for %s: %s' , check_request , res ) return res try : transport = self . _create_transport ( ) resp = transport . services . Check ( check_req ) self . _check_aggregator . add_response ( check_req , resp ) return resp except exceptions . Error : _logger . error ( u'direct send of check request failed %s' , check_request , exc_info = True ) return None
Process a check_request.

        The req is first passed to the check_aggregator.  If there is a valid
        cached response, that is returned, otherwise a response is obtained from
        the transport.

        Args:
          check_req (``ServicecontrolServicesCheckRequest``): to be sent to
            the service control service

        Returns:
           ``CheckResponse``: either the cached response if one is applicable
            or a response from making a transport request, or None if
            if the request to the transport fails