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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.
"""Utilities for use with the base interface of RPC Framework."""
import collections
from grpc.framework.interfaces.base import base
class _Completion(
base.Completion,
collections.namedtuple(
"_Completion",
(
"terminal_metadata",
"code",
"message",
),
),
):
"""A trivial implementation of base.Completion."""
class _Subscription(
base.Subscription,
collections.namedtuple(
"_Subscription",
(
"kind",
"termination_callback",
"allowance",
"operator",
"protocol_receiver",
),
),
):
"""A trivial implementation of base.Subscription."""
_NONE_SUBSCRIPTION = _Subscription(
base.Subscription.Kind.NONE, None, None, None, None
)
def completion(terminal_metadata, code, message):
"""Creates a base.Completion aggregating the given operation values.
Args:
terminal_metadata: A terminal metadata value for an operaton.
code: A code value for an operation.
message: A message value for an operation.
Returns:
A base.Completion aggregating the given operation values.
"""
return _Completion(terminal_metadata, code, message)
def full_subscription(operator, protocol_receiver):
"""Creates a "full" base.Subscription for the given base.Operator.
Args:
operator: A base.Operator to be used in an operation.
protocol_receiver: A base.ProtocolReceiver to be used in an operation.
Returns:
A base.Subscription of kind base.Subscription.Kind.FULL wrapping the given
base.Operator and base.ProtocolReceiver.
"""
return _Subscription(
base.Subscription.Kind.FULL, None, None, operator, protocol_receiver
)
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