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# 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())
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