public override async Task chat(IAsyncStreamReader <ChatMessage> requestStream,
IServerStreamWriter <ChatMessageFromServer> responseStream,
ServerCallContext context)
{
// Keep track of connected clients
responseStreams.Add(responseStream);
while (await requestStream.MoveNext(CancellationToken.None))
{
// Get the client message from the request stream
var messageFromClient = requestStream.Current;
// Create a server message that wraps the client message
var message = new ChatMessageFromServer
{
Message = messageFromClient
};
// Send to connected clients
foreach (var stream in responseStreams)
{
await stream.WriteAsync(message);
}
}
}
public override async Task chat(
IAsyncStreamReader <ChatMessage> requestStream,
IServerStreamWriter <ChatMessageFromServer> responseStream,
ServerCallContext context)
{
long id = ++_id;
WriteLine($"New streaming request [{_id}]:");
s_responseStreams.TryAdd(id, responseStream);
try
{
while (await requestStream.MoveNext(CancellationToken.None))
{
// Get the client message from the request stream
var messageFromClient = requestStream.Current;
WriteLine($"Received new request [{_id}]: {messageFromClient.From}");
// Create a server message that wraps the client message
var message = new ChatMessageFromServer
{
Message = messageFromClient
};
foreach (var streamKvp in s_responseStreams)
{
try
{
// Send to connected clients
await streamKvp.Value.WriteAsync(message);
}
catch (RpcException ex)
{
// TODO: remove the key from list.
WriteLine($"Write error [{streamKvp.Key}]: {ex}");
}
}
}
}
finally
{
WriteLine($"Exit streaming request [{_id}]:");
IServerStreamWriter <ChatMessageFromServer> dummy;
s_responseStreams.TryRemove(id, out dummy);
}
}
public override async Task Chat(IAsyncStreamReader <ChatMessage> requestStream, IServerStreamWriter <ChatMessageFromServer> responseStream, ServerCallContext context)
{
ResponseStreams.Add(responseStream);
while (await requestStream.MoveNext(CancellationToken.None))
{
var messageFromClient = requestStream.Current;
var message = new ChatMessageFromServer
{
Message = messageFromClient
};
foreach (var stream in ResponseStreams)
{
await stream.WriteAsync(message);
}
}
ResponseStreams.Remove(responseStream);
}
private void ReactOnChatMessage(ChatMessageFromServer message) => messageOutputService.OutputMessage(message.Message, message.Name);
