1# Copyright 2020 The gRPC Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""gRPC Python AsyncIO helloworld.Greeter client with channel options and timeout parameters.""" 15 16import asyncio 17import logging 18 19import grpc 20import helloworld_pb2 21import helloworld_pb2_grpc 22 23# For more channel options, please see https://grpc.io/grpc/core/group__grpc__arg__keys.html 24CHANNEL_OPTIONS = [ 25 ("grpc.lb_policy_name", "pick_first"), 26 ("grpc.enable_retries", 0), 27 ("grpc.keepalive_timeout_ms", 10000), 28] 29 30 31async def run() -> None: 32 async with grpc.aio.insecure_channel( 33 target="localhost:50051", options=CHANNEL_OPTIONS 34 ) as channel: 35 stub = helloworld_pb2_grpc.GreeterStub(channel) 36 # Timeout in seconds. 37 # Please refer gRPC Python documents for more detail. https://grpc.io/grpc/python/grpc.html 38 response = await stub.SayHello( 39 helloworld_pb2.HelloRequest(name="you"), timeout=10 40 ) 41 print("Greeter client received: " + response.message) 42 43 44if __name__ == "__main__": 45 logging.basicConfig() 46 asyncio.run(run()) 47