public override async Task SendData(IAsyncStreamReader <MyMessage> requestStream, IServerStreamWriter <MyMessage> responseStream, ServerCallContext context)
{
var httpContext = context.GetHttpContext();
_logger.LogInformation($"Connection id: {httpContext.Connection.Id}");
if (!await requestStream.MoveNext())
{
return;
}
var user = requestStream.Current.Name;
_logger.LogInformation($"{user} connected");
var subscriber = new SubscribersModel
{
Subscriber = responseStream,
Name = user
};
_serverGrpcSubscribers.AddSubscriber(subscriber);
do
{
await _serverGrpcSubscribers.BroadcastMessageAsync(requestStream.Current);
} while (await requestStream.MoveNext());
_serverGrpcSubscribers.RemoveSubscriber(subscriber);
_logger.LogInformation($"{user} disconnected");
}
public void AddSubscriber(SubscribersModel subscriber)
{
bool added = Subscribers.TryAdd(subscriber.Name, subscriber);
_logger.LogInformation($"New subscriber added: {subscriber.Name}");
if (!added)
{
_logger.LogInformation($"could not add subscriber: {subscriber.Name}");
}
}
public void RemoveSubscriber(SubscribersModel subscriber)
{
try
{
Subscribers.TryRemove(subscriber.Name, out SubscribersModel item);
_logger.LogInformation($"Force Remove: {item.Name} - no longer works");
}
catch (Exception ex)
{
_logger.LogError(ex, $"Could not remove {subscriber.Name}");
}
}
private async Task <SubscribersModel> SendMessageToSubscriber(SubscribersModel subscriber, MyMessage message)
{
try
{
_logger.LogInformation($"Broadcasting: {message.Name} - {message.Message}");
await subscriber.Subscriber.WriteAsync(message);
return(null);
}
catch (Exception ex)
{
_logger.LogError(ex, "Could not send");
return(subscriber);
}
}