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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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135 lines
4.7 KiB
135 lines
4.7 KiB
# Copyright 2015-2016, Google Inc. |
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# All rights reserved. |
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# |
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# Redistribution and use in source and binary forms, with or without |
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# modification, are permitted provided that the following conditions are |
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# met: |
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# |
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# * Redistributions of source code must retain the above copyright |
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# notice, this list of conditions and the following disclaimer. |
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# * Redistributions in binary form must reproduce the above |
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# copyright notice, this list of conditions and the following disclaimer |
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# in the documentation and/or other materials provided with the |
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# distribution. |
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# * Neither the name of Google Inc. nor the names of its |
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# contributors may be used to endorse or promote products derived from |
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# this software without specific prior written permission. |
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# |
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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"""The Python implementation of the gRPC route guide client.""" |
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from __future__ import print_function |
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import random |
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import time |
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from grpc.beta import implementations |
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import route_guide_pb2 |
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import route_guide_resources |
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_TIMEOUT_SECONDS = 30 |
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def make_route_note(message, latitude, longitude): |
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return route_guide_pb2.RouteNote( |
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message=message, |
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location=route_guide_pb2.Point(latitude=latitude, longitude=longitude)) |
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def guide_get_one_feature(stub, point): |
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feature = stub.GetFeature(point, _TIMEOUT_SECONDS) |
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if not feature.location: |
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print("Server returned incomplete feature") |
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return |
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if feature.name: |
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print("Feature called %s at %s" % (feature.name, feature.location)) |
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else: |
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print("Found no feature at %s" % feature.location) |
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def guide_get_feature(stub): |
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guide_get_one_feature(stub, route_guide_pb2.Point(latitude=409146138, longitude=-746188906)) |
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guide_get_one_feature(stub, route_guide_pb2.Point(latitude=0, longitude=0)) |
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def guide_list_features(stub): |
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rect = route_guide_pb2.Rectangle( |
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lo=route_guide_pb2.Point( |
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latitude=400000000, longitude = -750000000), |
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hi=route_guide_pb2.Point( |
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latitude = 420000000, longitude = -730000000)) |
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print("Looking for features between 40, -75 and 42, -73") |
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features = stub.ListFeatures(rect, _TIMEOUT_SECONDS) |
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for feature in features: |
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print("Feature called %s at %s" % (feature.name, feature.location)) |
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def generate_route(feature_list): |
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for _ in range(0, 10): |
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random_feature = feature_list[random.randint(0, len(feature_list) - 1)] |
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print("Visiting point %s" % random_feature.location) |
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yield random_feature.location |
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time.sleep(random.uniform(0.5, 1.5)) |
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def guide_record_route(stub): |
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feature_list = route_guide_resources.read_route_guide_database() |
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route_iter = generate_route(feature_list) |
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route_summary = stub.RecordRoute(route_iter, _TIMEOUT_SECONDS) |
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print("Finished trip with %s points " % route_summary.point_count) |
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print("Passed %s features " % route_summary.feature_count) |
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print("Travelled %s meters " % route_summary.distance) |
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print("It took %s seconds " % route_summary.elapsed_time) |
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def generate_messages(): |
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messages = [ |
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make_route_note("First message", 0, 0), |
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make_route_note("Second message", 0, 1), |
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make_route_note("Third message", 1, 0), |
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make_route_note("Fourth message", 0, 0), |
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make_route_note("Fifth message", 1, 0), |
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] |
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for msg in messages: |
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print("Sending %s at %s" % (msg.message, msg.location)) |
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yield msg |
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time.sleep(random.uniform(0.5, 1.0)) |
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def guide_route_chat(stub): |
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responses = stub.RouteChat(generate_messages(), _TIMEOUT_SECONDS) |
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for response in responses: |
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print("Received message %s at %s" % (response.message, response.location)) |
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def run(): |
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channel = implementations.insecure_channel('localhost', 50051) |
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stub = route_guide_pb2.beta_create_RouteGuide_stub(channel) |
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print("-------------- GetFeature --------------") |
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guide_get_feature(stub) |
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print("-------------- ListFeatures --------------") |
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guide_list_features(stub) |
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print("-------------- RecordRoute --------------") |
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guide_record_route(stub) |
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print("-------------- RouteChat --------------") |
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guide_route_chat(stub) |
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if __name__ == '__main__': |
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run()
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