/// <summary>
/// This method handles the task of calling the remote gRPC Service ListFeatures by passing a Message Type of
/// Rectangle which contains (2) Points. The result is a gRPC response STREAM of Feature Message Types.
/// </summary>
/// <param name="areaOfInterest">A Routeguide Rectangle containing two Points</param>
/// <returns></returns>
public async Task ListFeatures(Routeguide.Rectangle areaOfInterest)
{
Debug.Log("ListFeatures Client Lo latitude: " + areaOfInterest.Lo.Latitude +
", Lo longitude: " + areaOfInterest.Lo.Longitude + "\n" +
", Hi latitude: " + areaOfInterest.Hi.Latitude +
", Hi longitude: " + areaOfInterest.Hi.Longitude);
StringBuilder responseText = new StringBuilder();
try
{
var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
//Sending and Receiving will be sequential - send first, then receive stream response second
var response = _client.ListFeatures(areaOfInterest, cancellationToken: cts.Token);
while (await response.ResponseStream.MoveNext())
{
var thisItemName = response.ResponseStream.Current.Name;
if (!String.IsNullOrEmpty(thisItemName))
{
_myRouteGuideUiHandler.AddTextToUi(thisItemName, false);
}
}
}
catch (RpcException e)
{
_myRouteGuideUiHandler.AddTextToUi("ListFeatures Service is unavailable. " + e.Message, false);
}
#if DEBUG
Debug.Log("async Task ListFeatures Finished");
#endif
}
/// <summary>
/// This method front ends a gRPC client method which makes a call to the remote gRPC server, passing a SET of
/// Two POINTs within a Rectangle Message Type.
/// The response from the gRPC server is an asynchronous STREAM of Feature Message types
/// Essentially - Single Client REQUEST/Server-side asynchronous response STREAM
/// </summary>
public async void GetMultipleFeatures()
{
ClearTMPTextChildren();
var pointOfInterestLo = new Routeguide.Point {
Latitude = 400000000, Longitude = -750000000
};
var pointOfInterestHi = new Routeguide.Point {
Latitude = 420000000, Longitude = -730000000
};
var areaOfInterest = new Routeguide.Rectangle
{
Lo = pointOfInterestLo,
Hi = pointOfInterestHi,
};
await _routeGuideClient.ListFeatures(areaOfInterest);
Debug.Log("GetMultipleFeatures Finished");
}