1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""The Python implementation of the gRPC route guide client."""
import route_guide_pb2
import json
import random
import time
_TIMEOUT_SECONDS = 30
def read_route_guide_db():
"""Reads the route guide"""
feature_list = []
with open("route_guide_db.json") as route_guide_db_file:
for item in json.load(route_guide_db_file):
feature = route_guide_pb2.Feature(name=item["name"])
feature.location.longitude = item["location"]["longitude"]
feature.location.latitude = item["location"]["latitude"]
feature_list.append(feature)
return feature_list
def make_route_note(message, latitude, longitude):
route_note = route_guide_pb2.RouteNote(message=message)
route_note.location.latitude = latitude
route_note.location.longitude = longitude
return route_note
def guide_get_one_feature(stub, point):
feature = stub.GetFeature(point, _TIMEOUT_SECONDS)
if not feature.location:
print "Server returned incomplete feature"
return
if feature.name:
print "Feature called %s at %s" % (feature.name, feature.location)
else:
print "Found no feature at %s" % feature.location
def guide_get_feature(stub):
guide_get_one_feature(stub, route_guide_pb2.Point(latitude=409146138, longitude=-746188906))
guide_get_one_feature(stub, route_guide_pb2.Point(latitude=0, longitude=0))
def guide_list_features(stub):
rect = route_guide_pb2.Rectangle()
rect.lo.latitude = 400000000
rect.lo.longitude = -750000000
rect.hi.latitude = 420000000
rect.hi.longitude = -730000000
print "Looking for features between 40, -75 and 42, -73"
features = stub.ListFeatures(rect, _TIMEOUT_SECONDS)
for feature in features:
print "Feature called %s at %s" % (feature.name, feature.location)
def generate_route(feature_list):
for index in range(0, 10):
random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
print "Visiting point %s" % random_feature.location
yield random_feature.location
time.sleep(random.uniform(0.5, 1.5))
def guide_record_route(stub):
feature_list = read_route_guide_db()
route_iter = generate_route(feature_list)
route_summary = stub.RecordRoute(route_iter, _TIMEOUT_SECONDS)
print "Finished trip with %s points " % route_summary.point_count
print "Passed %s features " % route_summary.feature_count
print "Travelled %s meters " % route_summary.distance
print "It took %s seconds " % route_summary.elapsed_time
def generate_messages():
messages = [
make_route_note("First message", 0, 0),
make_route_note("Second message", 0, 1),
make_route_note("Third message", 1, 0),
make_route_note("Fourth message", 0, 0),
make_route_note("Fifth message", 1, 0),
]
for msg in messages:
print "Sending %s at %s" % (msg.message, msg.location)
yield msg
time.sleep(random.uniform(0.5, 1.0))
def guide_route_chat(stub):
responses = stub.RouteChat(generate_messages(), _TIMEOUT_SECONDS)
for response in responses:
print "Received message %s at %s" % (response.message, response.location)
def run():
with route_guide_pb2.early_adopter_create_RouteGuide_stub('localhost', 50051) as stub:
print "-------------- GetFeature --------------"
guide_get_feature(stub);
print "-------------- ListFeatures --------------"
guide_list_features(stub);
print "-------------- RecordRoute --------------"
guide_record_route(stub);
print "-------------- RouteChat --------------"
guide_route_chat(stub);
if __name__ == '__main__':
run()
|
