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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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59 lines
2.0 KiB
59 lines
2.0 KiB
3 years ago
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# Copyright 2021 The 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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"""A flaky backend for the gRPC Python retry example."""
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import asyncio
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import collections
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import logging
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import random
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import grpc
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helloworld_pb2, helloworld_pb2_grpc = grpc.protos_and_services(
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"helloworld.proto")
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class ErrorInjectingGreeter(helloworld_pb2_grpc.GreeterServicer):
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def __init__(self):
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self._counter = collections.defaultdict(int)
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async def SayHello(
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self, request: helloworld_pb2.HelloRequest,
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context: grpc.aio.ServicerContext) -> helloworld_pb2.HelloReply:
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self._counter[context.peer()] += 1
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if self._counter[context.peer()] < 5:
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if random.random() < 0.75:
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logging.info('Injecting error to RPC from %s', context.peer())
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await context.abort(grpc.StatusCode.UNAVAILABLE,
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'injected error')
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logging.info('Successfully responding to RPC from %s', context.peer())
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return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
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async def serve() -> None:
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server = grpc.aio.server()
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helloworld_pb2_grpc.add_GreeterServicer_to_server(ErrorInjectingGreeter(),
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server)
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listen_addr = '[::]:50051'
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server.add_insecure_port(listen_addr)
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logging.info("Starting flaky server on %s", listen_addr)
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await server.start()
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await server.wait_for_termination()
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if __name__ == '__main__':
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logging.basicConfig(level=logging.INFO)
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asyncio.run(serve())
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