examples/python/hellostreamingworld/async_greeter_server.py

# Copyright 2021 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 Python AsyncIO implementation of the GRPC hellostreamingworld.MultiGreeter server."""

import asyncio
import logging

import grpc
from hellostreamingworld_pb2 import HelloReply
from hellostreamingworld_pb2 import HelloRequest
from hellostreamingworld_pb2_grpc import MultiGreeterServicer
from hellostreamingworld_pb2_grpc import add_MultiGreeterServicer_to_server

NUMBER_OF_REPLY = 10


class Greeter(MultiGreeterServicer):
    async def sayHello(
        self, request: HelloRequest, context: grpc.aio.ServicerContext
    ) -> HelloReply:
        logging.info("Serving sayHello request %s", request)
        for i in range(NUMBER_OF_REPLY):
            yield HelloReply(message=f"Hello number {i}, {request.name}!")


async def serve() -> None:
    server = grpc.aio.server()
    add_MultiGreeterServicer_to_server(Greeter(), server)
    listen_addr = "[::]:50051"
    server.add_insecure_port(listen_addr)
    logging.info("Starting server on %s", listen_addr)
    await server.start()
    await server.wait_for_termination()


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO)
    asyncio.run(serve())