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# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Defines an enum for classifying RPC methods by streaming semantics."""
import enum
@enum.unique
class Cardinality(enum.Enum):
"""Describes the streaming semantics of an RPC method."""
UNARY_UNARY = 'request-unary/response-unary'
UNARY_STREAM = 'request-unary/response-streaming'
STREAM_UNARY = 'request-streaming/response-unary'
STREAM_STREAM = 'request-streaming/response-streaming'
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