/// <summary>
/// Gets a stream of points, and responds with statistics about the "trip": number of points,
/// number of known features visited, total distance traveled, and total time spent.
/// </summary>
public async Task <RouteSummary> RecordRoute(Grpc.Core.ServerCallContext context, Grpc.Core.IAsyncStreamReader <Point> requestStream)
{
int pointCount = 0;
int featureCount = 0;
int distance = 0;
Point previous = null;
var stopwatch = new Stopwatch();
stopwatch.Start();
while (await requestStream.MoveNext())
{
var point = requestStream.Current;
pointCount++;
if (RouteGuideUtil.Exists(CheckFeature(point)))
{
featureCount++;
}
if (previous != null)
{
distance += (int)CalcDistance(previous, point);
}
previous = point;
}
stopwatch.Stop();
return(RouteSummary.CreateBuilder().SetPointCount(pointCount)
.SetFeatureCount(featureCount).SetDistance(distance)
.SetElapsedTime((int)(stopwatch.ElapsedMilliseconds / 1000)).Build());
}
/// <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 = Point.CreateBuilder().SetLatitude(lat).SetLongitude(lon).Build();
Feature feature = client.GetFeature(request);
if (RouteGuideUtil.Exists(feature))
{
Log("Found feature called \"{0}\" at {1}, {2}",
feature.Name,
RouteGuideUtil.GetLatitude(feature.Location),
RouteGuideUtil.GetLongitude(feature.Location));
}
else
{
Log("Found no feature at {0}, {1}",
RouteGuideUtil.GetLatitude(feature.Location),
RouteGuideUtil.GetLongitude(feature.Location));
}
}
catch (RpcException e)
{
Log("RPC failed " + e);
throw e;
}
}
/// <summary>
/// Gets all features contained within the given bounding rectangle.
/// </summary>
public async Task ListFeatures(Grpc.Core.ServerCallContext context, Rectangle request, Grpc.Core.IServerStreamWriter <Feature> responseStream)
{
int left = Math.Min(request.Lo.Longitude, request.Hi.Longitude);
int right = Math.Max(request.Lo.Longitude, request.Hi.Longitude);
int top = Math.Max(request.Lo.Latitude, request.Hi.Latitude);
int bottom = Math.Min(request.Lo.Latitude, request.Hi.Latitude);
foreach (var feature in features)
{
if (!RouteGuideUtil.Exists(feature))
{
continue;
}
int lat = feature.Location.Latitude;
int lon = feature.Location.Longitude;
if (lon >= left && lon <= right && lat >= bottom && lat <= top)
{
await responseStream.WriteAsync(feature);
}
}
}
