Initial checkin of gRPC to third_party/

third_party/grpc/examples/csharp/route_guide/RouteGuideClient/Program.cs

Index: third_party/grpc/examples/csharp/route_guide/RouteGuideClient/Program.cs
diff --git a/third_party/grpc/examples/csharp/route_guide/RouteGuideClient/Program.cs b/third_party/grpc/examples/csharp/route_guide/RouteGuideClient/Program.cs
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+// Copyright 2015-2016, 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.
+
+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.IRouteGuideClient client;
+
+            public RouteGuideClient(RouteGuide.IRouteGuideClient 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(RouteGuide.NewClient(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();
+        }
+    }
+}