1# Copyright 2015 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""Defines an enum for classifying RPC methods by streaming semantics.""" 15 16import enum 17 18 19@enum.unique 20class Cardinality(enum.Enum): 21 """Describes the streaming semantics of an RPC method.""" 22 23 UNARY_UNARY = 'request-unary/response-unary' 24 UNARY_STREAM = 'request-unary/response-streaming' 25 STREAM_UNARY = 'request-streaming/response-unary' 26 STREAM_STREAM = 'request-streaming/response-streaming' 27