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# Copyright 2015, 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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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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