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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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85 lines
3.0 KiB
85 lines
3.0 KiB
# Copyright the 2019 gRPC authors. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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"""An example of cancelling requests in gRPC.""" |
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from __future__ import absolute_import |
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from __future__ import division |
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from __future__ import print_function |
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from concurrent import futures |
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import argparse |
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import datetime |
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import logging |
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import time |
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import grpc |
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from examples.python.cancellation import hash_name_pb2 |
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from examples.python.cancellation import hash_name_pb2_grpc |
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_DESCRIPTION = "A client for finding hashes similar to names." |
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_LOGGER = logging.getLogger(__name__) |
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# Interface: |
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# Cancel on ctrl+c or an ideal candidate. |
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def run_unary_client(server_target, name, ideal_distance): |
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# TODO(rbellevi): Cancel on ctrl+c |
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with grpc.insecure_channel(server_target) as channel: |
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stub = hash_name_pb2_grpc.HashFinderStub(channel) |
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while True: |
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print("Sending request") |
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future = stub.Find.future(hash_name_pb2.HashNameRequest(desired_name=name, |
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ideal_hamming_distance=ideal_distance)) |
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# TODO(rbellevi): Do not leave in a cancellation based on timeout. |
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# That's best handled by, well.. timeout. |
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try: |
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result = future.result(timeout=20.0) |
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print("Got response: \n{}".format(result)) |
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except grpc.FutureTimeoutError: |
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print("Cancelling request") |
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future.cancel() |
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def run_streaming_client(target, name, ideal_distance, interesting_distance): |
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pass |
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def main(): |
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parser = argparse.ArgumentParser(description=_DESCRIPTION) |
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parser.add_argument("name", type=str, help='The desired name.') |
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parser.add_argument("--ideal-distance", default=0, nargs='?', |
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type=int, help="The desired Hamming distance.") |
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parser.add_argument( |
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'--server', |
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default='localhost:50051', |
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type=str, |
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nargs='?', |
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help='The host-port pair at which to reach the server.') |
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parser.add_argument( |
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'--show-inferior', |
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default=None, |
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type=int, |
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nargs='?', |
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help='Also show candidates with a Hamming distance less than this value.') |
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args = parser.parse_args() |
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if args.show_inferior is not None: |
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run_streaming_client(args.server, args.name, args.ideal_distance, args.interesting_distance) |
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else: |
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run_unary_client(args.server, args.name, args.ideal_distance) |
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if __name__ == "__main__": |
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logging.basicConfig() |
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main()
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