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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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58 lines
2.0 KiB
58 lines
2.0 KiB
# 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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