public override async Task <GatherResponse> Gather(IAsyncStreamReader <GatherRequest> requestStream, ServerCallContext context)
{
ICollection <string> messages = new List <string>();
await foreach (GatherRequest request in requestStream.ReadAllAsync())
{
messages.Add(request.Msg);
}
GatherResponse response = new() { Result = string.Join(" - ", messages) };
return(response);
}
}
public override async Task <CounterReply> AccumulateCount(IAsyncStreamReader <CounterRequest> requestStream, ServerCallContext context)
{
using (var call = _counterClient.AccumulateCount())
{
await foreach (var message in requestStream.ReadAllAsync())
{
await call.RequestStream.WriteAsync(message);
}
await call.RequestStream.CompleteAsync();
return(await call);
}
}
public override async Task <HelloReply> SayHelloClientStreaming(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
var names = new List <string>();
await foreach (var request in requestStream.ReadAllAsync())
{
names.Add(request.Name);
}
return(new HelloReply()
{
Message = string.Join(",", names)
});
}
public async Task <SentenceMessage> RunAsync(IAsyncStreamReader <WordMessage> request, ServerCallContext context)
{
List <string> words = new List <string>();
await foreach (var word in request.ReadAllAsync())
{
words.Add(word.Word);
Console.WriteLine($"Received word: {word.Word}");
}
return(new SentenceMessage {
Sentence = string.Join(" ", words) + "."
});
}
public override async Task <Empty> SendDiagnostics(IAsyncStreamReader <ReadingMessage> requestStream, ServerCallContext context)
{
var theTask = Task.Run(async() =>
{
await foreach (var reading in requestStream.ReadAllAsync())
{
_logger.LogInformation($"Received reading: {reading}");
}
});
await theTask;
return(new Empty());
}
public override async Task <NumberResponse> SendNumber(IAsyncStreamReader <NumberRequest> requestStream, ServerCallContext context)
{
var total = 0;
await foreach (var number in requestStream.ReadAllAsync())
{
_logger.LogInformation($"Recieved number -> {number.Value}");
total += number.Value;
}
return(new NumberResponse {
Result = total
});
}
public override async Task <HelloReply> SayHelloToLastRequest(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
var name = string.Empty;
await foreach (var request in requestStream.ReadAllAsync())
{
name = request.Name;
}
return(new HelloReply
{
Message = $"Hello {name}"
});
}
public override async Task StreamingBothWays(IAsyncStreamReader <HelloRequest> requestStream, IServerStreamWriter <HelloReply> responseStream, ServerCallContext context)
{
var readTask = Task.Run(async() =>
{
_logger.LogInformation($"Request Header:");
foreach (var header in context.RequestHeaders)
{
_logger.LogInformation($" {header.Key} = {header.Value}");
}
try
{
await foreach (var message in requestStream.ReadAllAsync(context.CancellationToken))
{
await responseStream.WriteAsync(new HelloReply()
{
Message = "Echo Duplex " + message.Name,
});
}
}
catch (TaskCanceledException tex)
{
// client disconnected while command executing
}
catch (System.IO.IOException iex)
{
// client disconnected
}
});
try
{
while (!readTask.IsCompleted)
{
await responseStream.WriteAsync(new HelloReply()
{
Message = "Duplex",
});
await Task.Delay(TimeSpan.FromMilliseconds(500), context.CancellationToken);
}
}
catch (TaskCanceledException tex)
{
// client disconnected while command executing
}
await readTask;
}
public override async Task <HelloReply> SayHelloClientStreaming(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
var names = new List <string>();
await foreach (var message in requestStream.ReadAllAsync())
{
_logger.LogInformation($"SayHelloClientStreaming: accumulating name {message.Name}.");
names.Add(message.Name);
}
_logger.LogInformation($"SayHelloClientStreaming: sending greeting to {string.Join(", ", names)}");
return(new HelloReply {
Message = "Hello " + string.Join(", ", names)
});
}
public override async Task Download(IAsyncStreamReader <ImageRequest> requestStream, IServerStreamWriter <ImageResponse> responseStream, ServerCallContext context)
{
var readTask = Task.Run(async() =>
{
await foreach (var message in requestStream.ReadAllAsync())
{
_queue.Enqueue(message.Url);
_logger.LogInformation($"Download request {message.Url}");
}
});
await readTask.ConfigureAwait(false);
await ProcessQueue(responseStream, context).ConfigureAwait(false);
}
private async Task ConsumeMessagesAsync(IServerChatClient client, IAsyncStreamReader <ClientMessage> requestStream, CancellationToken token)
{
await foreach (var message in requestStream.ReadAllAsync(token).ConfigureAwait(false))
{
try
{
await client.HandleMessageAsync(message, _clientRepository).ConfigureAwait(false);
}
catch (Exception e)
{
Log.Error(nameof(GrpcChatService), $"Something went wrong while broadcasting a message: {e.InnerException?.Message}");
throw;
}
}
}
public async override Task <VoucherResponse> UploadVoucher(IAsyncStreamReader <VoucherRequest> requestStream, ServerCallContext context)
{
VoucherResponse response = new VoucherResponse {
Message = "Operation Successful"
};
await foreach (var m in requestStream.ReadAllAsync())
{
_tripVoucherService.UploadVoucher(new TripVoucher
{
Amount = m.Amount,
});
}
return(response);
}
//Client stream
public override async Task <BrojMsg> Sabirac(IAsyncStreamReader <BrojMsg> requestStream, ServerCallContext context)
{
_log.LogDebug("Krecem sa radom");
int zbir = 0;
await foreach (BrojMsg br in requestStream.ReadAllAsync())
{
_log.LogDebug($"Primio {br.Br}");
zbir += br.Br;
}
_log.LogDebug("Zavrsen stream, vracam rezultat");
return(new BrojMsg {
Br = zbir
});
}
public override async Task <BrojPoruka> Sabirac(IAsyncStreamReader <BrojPoruka> requestStream, ServerCallContext context)
{
int zbir = 0;
_logger.LogInformation("Primam stream");
await foreach (BrojPoruka bp in requestStream.ReadAllAsync())
{
_logger.LogInformation($"Dobio broj {bp.Br}");
zbir += bp.Br;
}
_logger.LogInformation("Zavrsen stream, saljem odgovor");
return(new BrojPoruka {
Br = zbir
});
}
public override async Task <HelloReply> SayHellos(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
List <string> names = new List <string>();
await foreach (var item in requestStream.ReadAllAsync())
{
Console.WriteLine($"Server Read {item} ");
names.Add(item.Name);
}
return(new HelloReply
{
Message = string.Join(",", names)
});
}
// client streaming
public override async Task <HelloReply> StreamingFromClient(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
var overallMessage = "Hello ";
await foreach (var message in requestStream.ReadAllAsync())
{
// process individual message;
overallMessage += $"{message.Name}";
Console.Write(message.Name);
}
return(new HelloReply {
Message = overallMessage
}); // reply only sent when client ends stream
}
public override async Task <InsertBulkProductResponse> InsertBulkProduct(IAsyncStreamReader <ProductModel> requestStream, ServerCallContext context)
{
await foreach (var requestData in requestStream.ReadAllAsync())
{
_productsContext.Product.Add(_mapper.Map <Product>(requestData));
}
var insertCount = await _productsContext.SaveChangesAsync();
return(new InsertBulkProductResponse
{
Success = insertCount > 0,
InsertCount = insertCount
});
}
public override async Task DonateKittens(IAsyncStreamReader <LitterOfKittens> litters, IServerStreamWriter <CeaseAndDesist> responses, ServerCallContext _)
{
await foreach (var litter in litters.ReadAllAsync())
{
foreach (var kitten in litter.Kittens)
{
_basket.AddKitten(kitten);
}
if (_basket.TooManyKittens())
{
await responses.WriteAsync(new CeaseAndDesist { Severity = 100, Message = "Please stop donating kittens" });
}
}
}
private static async Task <List <Permission> > GetPermissions(IAsyncStreamReader <PermissionRequest> requestStream)
{
var permissions = new List <Permission>();
await foreach (var permission in requestStream.ReadAllAsync())
{
permissions.Add(new Permission
{
UserId = permission.UserId,
UserPermission = (UserPermission)permission.Permission
});
}
return(permissions);
}
public override async Task <HelloReply> SayHelloToLotsOfBuddies(IAsyncStreamReader <HelloRequest> requestStream, ServerCallContext context)
{
var names = new List <string>();
await foreach (var request in requestStream.ReadAllAsync())
{
names.Add(request.Name);
}
var message = $"Hello {string.Join(", ", names)}";
_logger.LogInformation($"Sending greeting {message}.");
return(new HelloReply {
Message = message
});
}
public override async Task <CounterReply> AccumulateCount(IAsyncStreamReader <CounterRequest> requestStream, ServerCallContext context)
{
var httpContext = context.GetHttpContext();
_logger.LogInformation($"Connection id: { httpContext.Connection.Id}");
await foreach (var message in requestStream.ReadAllAsync())
{
_logger.LogInformation($"Incrementing count by {message.Count}");
_counter.Increment(message.Count);
}
return(new CounterReply {
Count = _counter.Count
});
}
// 可以支持更复杂的方案，例如同时读取请求和发送响应
public override async Task ClientServerStream(
IAsyncStreamReader <HelloRequest> requestStream,
IServerStreamWriter <HelloReply> responseStream,
ServerCallContext context)
{
var counter = 0;
await foreach (var message in requestStream.ReadAllAsync())
{
counter++;
await responseStream.WriteAsync(new()
{
Message = message + " " + counter
});
}
}
public async override Task GetWeatherForecastByDateStream(IAsyncStreamReader <WeatherForecastByDateRequest> requestStream, IServerStreamWriter <WeatherForecast> responseStream, ServerCallContext context)
{
await foreach (var request in requestStream.ReadAllAsync())
{
if (context.CancellationToken.IsCancellationRequested)
{
break;
}
await Task.Delay(request.Delay.ToTimeSpan());
var response = _weatherForecastGenerator.GenerateWeatherForecast(request.Date);
await responseStream.WriteAsync(response);
_logger.LogInformation($"weather forecast sent on {request.Date:dd:MM:yyyy}");
}
}
public override async Task <SimpleResponse> StreamingFromClient(IAsyncStreamReader <SimpleRequest> requestStream, ServerCallContext context)
{
SimpleRequest?lastRequest = null;
await foreach (var item in requestStream.ReadAllAsync())
{
lastRequest = item;
}
;
if (lastRequest == null)
{
throw new InvalidOperationException("No client requests received.");
}
return(CreateResponse(lastRequest));
}
public override async Task BidiHello
(
IAsyncStreamReader <HelloRequest> requestStream,
IServerStreamWriter <HelloReply> responseStream,
ServerCallContext context
)
{
await foreach (var request in requestStream.ReadAllAsync())
{
var helloReply = new HelloReply
{
Message = "Hello " + request.Name
};
await responseStream.WriteAsync(helloReply);
}
}
public override async Task <Empty> MetricsUpdate(IAsyncStreamReader <MetricsUpdateRequest> requestStream, ServerCallContext context)
{
try
{
await foreach (var message in requestStream.ReadAllAsync())
{
_logger.LogInformation("Got metrics update");
}
}
catch (System.IO.IOException)
{
// This means the server shut down really fast, without closing connection.
_logger.LogInformation($"Server with trace {context.GetHttpContext().TraceIdentifier} lost connection down unexpectedly");
}
return(new Empty());
}
public override async Task Start(IAsyncStreamReader <GameRequest> requestStream,
IServerStreamWriter <GameResponse> responseStream, ServerCallContext context)
{
await foreach (var item in requestStream.ReadAllAsync())
{
if (item.EndGame)
{
break;
}
//
// client has played its dice
//
var serverResult = await RollDice();
await responseStream.WriteAsync(new GameResponse { ServerResult = $"Server result: {serverResult}" });
}
}
public override async Task HalfDuplexEcho(IAsyncStreamReader <EchoRequest> requestStream, IServerStreamWriter <EchoResponse> responseStream, ServerCallContext context)
{
var messages = new List <string>();
await foreach (var message in requestStream.ReadAllAsync())
{
messages.Add(message.Message);
}
foreach (var message in messages)
{
await responseStream.WriteAsync(new EchoResponse
{
Message = message
});
}
}
public override async Task MailBox(IAsyncStreamReader <ForwardMailMessage> requestStream, IServerStreamWriter <MailBoxMessage> responseStream, ServerCallContext context)
{
var mailboxName = context.RequestHeaders.Single(c => c.Key == "mailbox-name").Value;
_logger.LogInformation($"Connected to {mailboxName}");
_mailQueue.Changed += _mailQueue_Changed;
_mailQueue.Received();
try
{
await foreach (var item in requestStream.ReadAllAsync())
{
if (_mailQueue.TryForwardMail(out var message))
{
_logger.LogInformation($"Forwarded mail: {message.Content}");
}
else
{
_logger.LogWarning("No mail to forward.");
}
}
}
finally
{
_mailQueue.Changed -= _mailQueue_Changed;
}
_logger.LogInformation($"{mailboxName } disconnected");
await Task.CompletedTask;
async Task _mailQueue_Changed((int totalCount, int fowardCount, Reason reason) state)
{
await responseStream.WriteAsync(new MailBoxMessage
{
Forwarded = state.totalCount,
New = state.totalCount - state.fowardCount,
Reason = state.reason
});
}
}
public override async Task SayHelloEcho(IAsyncStreamReader <HelloEcho> requestStream, IServerStreamWriter <HelloEcho> responseStream, ServerCallContext context)
{
var rnd = new Random();
while (!context.CancellationToken.IsCancellationRequested)
{
await foreach (var request in requestStream.ReadAllAsync())
{
// Gotta look busy
await Task.Delay(rnd.Next(1000));
await responseStream.WriteAsync(new HelloEcho
{
Message = $"Echoed from server: {request.Message}"
});
}
}
}