| # Copyright 2020 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. |
| """Send multiple greeting messages to the backend.""" |
| |
| import argparse |
| import asyncio |
| import logging |
| |
| import grpc |
| |
| helloworld_pb2, helloworld_pb2_grpc = grpc.protos_and_services( |
| "helloworld.proto" |
| ) |
| |
| |
| async def process( |
| stub: helloworld_pb2_grpc.GreeterStub, request: helloworld_pb2.HelloRequest |
| ) -> None: |
| try: |
| response = await stub.SayHello(request) |
| except grpc.aio.AioRpcError as rpc_error: |
| print(f"Received error: {rpc_error}") |
| else: |
| print(f"Received message: {response}") |
| |
| |
| async def run(addr: str, n: int) -> None: |
| async with grpc.aio.insecure_channel(addr) as channel: |
| stub = helloworld_pb2_grpc.GreeterStub(channel) |
| request = helloworld_pb2.HelloRequest(name="you") |
| for _ in range(n): |
| await process(stub, request) |
| |
| |
| async def main() -> None: |
| parser = argparse.ArgumentParser() |
| parser.add_argument( |
| "--addr", |
| nargs=1, |
| type=str, |
| default="[::]:50051", |
| help="the address to request", |
| ) |
| parser.add_argument( |
| "-n", |
| nargs=1, |
| type=int, |
| default=10, |
| help="an integer for number of messages to sent", |
| ) |
| args = parser.parse_args() |
| await run(addr=args.addr, n=args.n) |
| |
| |
| if __name__ == "__main__": |
| logging.basicConfig(level=logging.INFO) |
| asyncio.get_event_loop().run_until_complete(main()) |