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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using Grpc.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Routeguide
{
class Program
{
/// <summary>
/// Sample client code that makes gRPC calls to the server.
/// </summary>
public class RouteGuideClient
{
readonly RouteGuide.RouteGuideClient client;
public RouteGuideClient(RouteGuide.RouteGuideClient client)
{
this.client = client;
}
/// <summary>
/// Blocking unary call example. Calls GetFeature and prints the response.
/// </summary>
public void GetFeature(int lat, int lon)
{
try
{
Log("*** GetFeature: lat={0} lon={1}", lat, lon);
Point request = new Point { Latitude = lat, Longitude = lon };
Feature feature = client.GetFeature(request);
if (feature.Exists())
{
Log("Found feature called \"{0}\" at {1}, {2}",
feature.Name, feature.Location.GetLatitude(), feature.Location.GetLongitude());
}
else
{
Log("Found no feature at {0}, {1}",
feature.Location.GetLatitude(), feature.Location.GetLongitude());
}
}
catch (RpcException e)
{
Log("RPC failed " + e);
throw;
}
}
/// <summary>
/// Server-streaming example. Calls listFeatures with a rectangle of interest. Prints each response feature as it arrives.
/// </summary>
public async Task ListFeatures(int lowLat, int lowLon, int hiLat, int hiLon)
{
try
{
Log("*** ListFeatures: lowLat={0} lowLon={1} hiLat={2} hiLon={3}", lowLat, lowLon, hiLat,
hiLon);
Rectangle request = new Rectangle
{
Lo = new Point { Latitude = lowLat, Longitude = lowLon },
Hi = new Point { Latitude = hiLat, Longitude = hiLon }
};
using (var call = client.ListFeatures(request))
{
var responseStream = call.ResponseStream;
StringBuilder responseLog = new StringBuilder("Result: ");
while (await responseStream.MoveNext())
{
Feature feature = responseStream.Current;
responseLog.Append(feature.ToString());
}
Log(responseLog.ToString());
}
}
catch (RpcException e)
{
Log("RPC failed " + e);
throw;
}
}
/// <summary>
/// Client-streaming example. Sends numPoints randomly chosen points from features
/// with a variable delay in between. Prints the statistics when they are sent from the server.
/// </summary>
public async Task RecordRoute(List<Feature> features, int numPoints)
{
try
{
Log("*** RecordRoute");
using (var call = client.RecordRoute())
{
// Send numPoints points randomly selected from the features list.
StringBuilder numMsg = new StringBuilder();
Random rand = new Random();
for (int i = 0; i < numPoints; ++i)
{
int index = rand.Next(features.Count);
Point point = features[index].Location;
Log("Visiting point {0}, {1}", point.GetLatitude(), point.GetLongitude());
await call.RequestStream.WriteAsync(point);
// A bit of delay before sending the next one.
await Task.Delay(rand.Next(1000) + 500);
}
await call.RequestStream.CompleteAsync();
RouteSummary summary = await call.ResponseAsync;
Log("Finished trip with {0} points. Passed {1} features. "
+ "Travelled {2} meters. It took {3} seconds.", summary.PointCount,
summary.FeatureCount, summary.Distance, summary.ElapsedTime);
Log("Finished RecordRoute");
}
}
catch (RpcException e)
{
Log("RPC failed", e);
throw;
}
}
/// <summary>
/// Bi-directional streaming example. Send some chat messages, and print any
/// chat messages that are sent from the server.
/// </summary>
public async Task RouteChat()
{
try
{
Log("*** RouteChat");
var requests = new List<RouteNote>
{
NewNote("First message", 0, 0),
NewNote("Second message", 0, 1),
NewNote("Third message", 1, 0),
NewNote("Fourth message", 0, 0)
};
using (var call = client.RouteChat())
{
var responseReaderTask = Task.Run(async () =>
{
while (await call.ResponseStream.MoveNext())
{
var note = call.ResponseStream.Current;
Log("Got message \"{0}\" at {1}, {2}", note.Message,
note.Location.Latitude, note.Location.Longitude);
}
});
foreach (RouteNote request in requests)
{
Log("Sending message \"{0}\" at {1}, {2}", request.Message,
request.Location.Latitude, request.Location.Longitude);
await call.RequestStream.WriteAsync(request);
}
await call.RequestStream.CompleteAsync();
await responseReaderTask;
Log("Finished RouteChat");
}
}
catch (RpcException e)
{
Log("RPC failed", e);
throw;
}
}
private void Log(string s, params object[] args)
{
Console.WriteLine(string.Format(s, args));
}
private void Log(string s)
{
Console.WriteLine(s);
}
private RouteNote NewNote(string message, int lat, int lon)
{
return new RouteNote
{
Message = message,
Location = new Point { Latitude = lat, Longitude = lon }
};
}
}
static void Main(string[] args)
{
var channel = new Channel("127.0.0.1:50052", ChannelCredentials.Insecure);
var client = new RouteGuideClient(new RouteGuide.RouteGuideClient(channel));
// Looking for a valid feature
client.GetFeature(409146138, -746188906);
// Feature missing.
client.GetFeature(0, 0);
// Looking for features between 40, -75 and 42, -73.
client.ListFeatures(400000000, -750000000, 420000000, -730000000).Wait();
// Record a few randomly selected points from the features file.
client.RecordRoute(RouteGuideUtil.ParseFeatures(RouteGuideUtil.DefaultFeaturesFile), 10).Wait();
// Send and receive some notes.
client.RouteChat().Wait();
channel.ShutdownAsync().Wait();
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
}
}
}
|
