def send(self, request, expect_response=True): """send request, return Future() Can block on network if request is larger than send_buffer_bytes """ future = Future() if self.connecting(): return future.failure(Errors.NodeNotReadyError(str(self))) elif not self.connected(): return future.failure(Errors.ConnectionError(str(self))) elif not self.can_send_more(): return future.failure(Errors.TooManyInFlightRequests(str(self))) return self._send(request, expect_response=expect_response)
def send(self, request, expect_response=True): """send request, return Future() Can block on network if request is larger than send_buffer_bytes """ future = Future() if self.connecting(): return future.failure(Errors.NodeNotReadyError(str(self))) elif not self.connected(): return future.failure(Errors.ConnectionError(str(self))) elif not self.can_send_more(): return future.failure(Errors.TooManyInFlightRequests(str(self))) correlation_id = self._next_correlation_id() header = RequestHeader(request, correlation_id=correlation_id, client_id=self.config['client_id']) message = b''.join([header.encode(), request.encode()]) size = Int32.encode(len(message)) try: # In the future we might manage an internal write buffer # and send bytes asynchronously. For now, just block # sending each request payload self._sock.setblocking(True) for data in (size, message): total_sent = 0 while total_sent < len(data): sent_bytes = self._sock.send(data[total_sent:]) total_sent += sent_bytes assert total_sent == len(data) self._sock.setblocking(False) except (AssertionError, ConnectionError) as e: log.exception("Error sending %s to %s", request, self) error = Errors.ConnectionError("%s: %s" % (str(self), e)) self.close(error=error) return future.failure(error) log.debug('%s Request %d: %s', self, correlation_id, request) if expect_response: ifr = InFlightRequest(request=request, correlation_id=correlation_id, response_type=request.RESPONSE_TYPE, future=future, timestamp=time.time()) self.in_flight_requests.append(ifr) else: future.success(None) return future