44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
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# Copyright 2015 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Interfaces related to streams of values or objects."""
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import abc
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class Consumer(abc.ABC):
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"""Interface for consumers of finite streams of values or objects."""
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@abc.abstractmethod
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def consume(self, value):
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"""Accepts a value.
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Args:
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value: Any value accepted by this Consumer.
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def terminate(self):
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"""Indicates to this Consumer that no more values will be supplied."""
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raise NotImplementedError()
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@abc.abstractmethod
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def consume_and_terminate(self, value):
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"""Supplies a value and signals that no more values will be supplied.
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Args:
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value: Any value accepted by this Consumer.
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"""
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raise NotImplementedError()
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