Spaces:
Sleeping
Sleeping
| # Copyright 2021 The 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. | |
| """The graceful shutdown example for the asyncio Greeter server.""" | |
| import asyncio | |
| import logging | |
| import grpc | |
| import helloworld_pb2 | |
| import helloworld_pb2_grpc | |
| # Coroutines to be invoked when the event loop is shutting down. | |
| _cleanup_coroutines = [] | |
| class Greeter(helloworld_pb2_grpc.GreeterServicer): | |
| async def SayHello( | |
| self, | |
| request: helloworld_pb2.HelloRequest, | |
| context: grpc.aio.ServicerContext, | |
| ) -> helloworld_pb2.HelloReply: | |
| logging.info("Received request, sleeping for 4 seconds...") | |
| await asyncio.sleep(4) | |
| logging.info("Sleep completed, responding") | |
| return helloworld_pb2.HelloReply(message="Hello, %s!" % request.name) | |
| async def serve() -> None: | |
| server = grpc.aio.server() | |
| helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server) | |
| listen_addr = "[::]:50051" | |
| server.add_insecure_port(listen_addr) | |
| logging.info("Starting server on %s", listen_addr) | |
| await server.start() | |
| async def server_graceful_shutdown(): | |
| logging.info("Starting graceful shutdown...") | |
| # Shuts down the server with 5 seconds of grace period. During the | |
| # grace period, the server won't accept new connections and allow | |
| # existing RPCs to continue within the grace period. | |
| await server.stop(5) | |
| _cleanup_coroutines.append(server_graceful_shutdown()) | |
| await server.wait_for_termination() | |
| if __name__ == "__main__": | |
| logging.basicConfig(level=logging.INFO) | |
| loop = asyncio.get_event_loop() | |
| try: | |
| loop.run_until_complete(serve()) | |
| finally: | |
| loop.run_until_complete(*_cleanup_coroutines) | |
| loop.close() | |