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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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136 lines
4.6 KiB
136 lines
4.6 KiB
# Copyright 2016 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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"""A client that makes both Greeter and RouteGuide RPCs.""" |
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from __future__ import print_function |
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import logging |
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import random |
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import time |
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import grpc |
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import helloworld_pb2 |
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import helloworld_pb2_grpc |
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import route_guide_pb2 |
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import route_guide_pb2_grpc |
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import route_guide_resources |
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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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) |
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def guide_get_one_feature(route_guide_stub, point): |
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feature = route_guide_stub.GetFeature(point) |
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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(route_guide_stub): |
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guide_get_one_feature( |
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route_guide_stub, |
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route_guide_pb2.Point(latitude=409146138, longitude=-746188906), |
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) |
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guide_get_one_feature( |
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route_guide_stub, route_guide_pb2.Point(latitude=0, longitude=0) |
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) |
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def guide_list_features(route_guide_stub): |
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rectangle = route_guide_pb2.Rectangle( |
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lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000), |
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hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000), |
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) |
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print("Looking for features between 40, -75 and 42, -73") |
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features = route_guide_stub.ListFeatures(rectangle) |
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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(route_guide_stub): |
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feature_list = route_guide_resources.read_route_guide_database() |
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route_iterator = generate_route(feature_list) |
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route_summary = route_guide_stub.RecordRoute(route_iterator) |
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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(route_guide_stub): |
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responses = route_guide_stub.RouteChat(generate_messages()) |
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for response in responses: |
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print( |
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"Received message %s at %s" % (response.message, response.location) |
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) |
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def run(): |
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# NOTE(gRPC Python Team): .close() is possible on a channel and should be |
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# used in circumstances in which the with statement does not fit the needs |
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# of the code. |
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with grpc.insecure_channel("localhost:50051") as channel: |
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greeter_stub = helloworld_pb2_grpc.GreeterStub(channel) |
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route_guide_stub = route_guide_pb2_grpc.RouteGuideStub(channel) |
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greeter_response = greeter_stub.SayHello( |
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helloworld_pb2.HelloRequest(name="you") |
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) |
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print("Greeter client received: " + greeter_response.message) |
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print("-------------- GetFeature --------------") |
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guide_get_feature(route_guide_stub) |
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print("-------------- ListFeatures --------------") |
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guide_list_features(route_guide_stub) |
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print("-------------- RecordRoute --------------") |
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guide_record_route(route_guide_stub) |
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print("-------------- RouteChat --------------") |
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guide_route_chat(route_guide_stub) |
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if __name__ == "__main__": |
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logging.basicConfig() |
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run()
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