grpc/examples/python/timeout/greeter_client.py

# Copyright 2023 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.
"""gRPC Python helloworld.Greeter client with call timeout parameters."""

import logging

import grpc
import helloworld_pb2
import helloworld_pb2_grpc


def unary_call(stub: helloworld_pb2_grpc.GreeterStub, request_id: int,
               message: str):
    print("call:", request_id)
    try:
        response = stub.SayHello(helloworld_pb2.HelloRequest(name=message),
                                 timeout=3)
        print(f"Greeter client received: {response.message}")
    except grpc.RpcError as rpc_error:
        print(f"Call failed with code: {rpc_error.code()}")


def run():
    with grpc.insecure_channel('localhost:50051') as channel:
        stub = helloworld_pb2_grpc.GreeterStub(channel)
        # Should success
        unary_call(stub, 1, 'you')
        # Should fail with DEADLINE_EXCEEDED
        unary_call(stub, 2, '[delay] you')


if __name__ == '__main__':
    logging.basicConfig()
    run()