public static async Task WriteAsync <T>(this IWritableChannel <T> channel, T item, CancellationToken cancellationToken = default)
{
var result = await channel.TryWriteAsync(item, cancellationToken).ConfigureAwait(false);
if (!result)
{
throw new OperationCanceledException();
}
}
// Implementation of server streaming method GetRateStream
public async Task GetRateStream(
CcyPair request,
IWritableChannel <CcyPairRate> responseStream,
MethodCallContext context)
{
Console.WriteLine("Received subscription: {0}", request);
try
{
do
{
var response = GetCcyPairRate(request);
Console.WriteLine("Sending response: {0}", response);
await responseStream.TryWriteAsync(response, context.CancellationToken);
await Task.Delay(_random.Next(1000, 3000), context.CancellationToken);
} while (!context.CancellationToken.IsCancellationRequested);
}
catch (OperationCanceledException) when(context.CancellationToken.IsCancellationRequested)
{
// Ignoring cancellation exception
}
Console.WriteLine("Subscription completed");
}