public override async Task getAllCustomer(Empty request,
Grpc.Core.IServerStreamWriter <Customer> responseStream,
Grpc.Core.ServerCallContext context)
{
List <Customer> responses = new List <Customer>();
try
{
conPG.Open();
strQuery = "SELECT * FROM handson_user";
NpgsqlCommand command = ExecutePGQuery(strQuery);
NpgsqlDataReader dtr = command.ExecuteReader();
while (dtr.Read())
{
Customer cus = new Customer();
cus.Id = Convert.ToString(dtr["id"]);
cus.Username = Convert.ToString(dtr["username"]);
cus.Password = Convert.ToString(dtr["password"]);
responses.Add(cus);
}
}
catch (Exception)
{
throw;
}
foreach (var response in responses)
{
await responseStream.WriteAsync(response);
}
}
public override async Task LoadSitesList(SettingsRequest request,
Grpc.Core.IServerStreamWriter <Settings> responseStream,
Grpc.Core.ServerCallContext context)
{
List <Settings> responses = null;
string userid = request.Userid;
List <String> settings = db.GetUserSettings(userid, "site");
foreach (var setting in settings)
{
await responseStream.WriteAsync(new Settings { Userid = userid, Field = setting });
}
Console.WriteLine("\nSettings sent to client. Userid: " + userid);
//responses.Add();
//лямбдой
//responses = db.GetUserSettings(userid, "site").Cast<List<Settings>>(){ new Settings { }};
//settings.FindAll((feature) => feature.Exists() && request.Contains(feature.Location));
//получаем из бд настройки для конкретного пользователя
//foreach (var response in responses)
//{
// await responseStream.WriteAsync(response);
//}
}
public override async Task RequestFrameStream(
Grpc.Core.IAsyncStreamReader <CameraAcquisitionRequest> requestStream,
Grpc.Core.IServerStreamWriter <BufferedFramesResponse> responseStream, Grpc.Core.ServerCallContext context)
{
lock (_frameStreamWriterLock)
{
_frameStreamWriter = responseStream;
}
while (await requestStream.MoveNext() && !context.CancellationToken.IsCancellationRequested)
{
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
var result = await RequestCameraAcquisition(requestStream.Current, context);
if (result.Error != null)
{
lock (_frameStreamWriterLock)
{
responseStream.WriteAsync(new BufferedFramesResponse()
{
Error = result.Error
});
break;
}
}
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
lock (_frameStreamWriterLock)
{
_frameStreamWriter = null;
}
}
public override global::System.Threading.Tasks.Task Import(Grpc.Core.IAsyncStreamReader <ImportRequest> requestStream, Grpc.Core.IServerStreamWriter <ImportResponse> responseStream, Grpc.Core.ServerCallContext context)
{
var res = new ImportResponse();
res.Result = "result123xyz";
Console.WriteLine("Server got request, sending response");
return(responseStream.WriteAsync(res));
}
public override async Task SayHellos(HelloRequest request, Grpc.Core.IServerStreamWriter <HelloReply> responseStream, Grpc.Core.ServerCallContext context)
{
var i = 0;
while (!context.CancellationToken.IsCancellationRequested)
{
var message = $"How are you {request.Name}? {++i}";
_logger.LogInformation($"Sending greeting {message}.");
await responseStream.WriteAsync(new HelloReply { Message = message });
await Task.Delay(1000);
}
}
public override async Task GreetServerStream(GreetRequest request, Grpc.Core.IServerStreamWriter <GreetResponse> responseStream, Grpc.Core.ServerCallContext context)
{
Console.WriteLine("Server received a normal greet request. Server will response with a stream!!!");
string response = string.Format("Hello {0} {1}", request.Greet.FirstName, request.Greet.LastName);
foreach (var item in Enumerable.Range(1, 10))
{
await responseStream.WriteAsync(new GreetResponse()
{
Response = response
});
}
}
//public override Task<NewsReply> FindNews(NewsRequest request, ServerCallContext context)
//{
// //load settings drom db
// foreach(string site in db.GetUserSettings(request.Userid, "site")){
// RSSReader.ReadUserFeed(site, db.GetUserSettings(request.Userid, "tag"));
// }
// //streaming
// return Task.FromResult(ConvertToRssItem(RSSReader.ReadFeed2(request.Url)[0]));
//}
public override async Task FindNews(NewsRequest request, Grpc.Core.IServerStreamWriter <NewsReply> responseStream, ServerCallContext context)
{
//load settings drom db
foreach (string site in db.GetUserSettings(request.Userid, "site"))
{
//streaming
foreach (SyndicationItem item in RSSReader.ReadUserFeed(site, db.GetUserSettings(request.Userid, "tag")))
{
await responseStream.WriteAsync(ConvertToRssItem(item));
}
}
Console.WriteLine("\nNews sent to client. Userid: " + request.Userid);
//return ; <NewsReply>
}
public override async Task ReadySetGo(Grpc.Core.IAsyncStreamReader <RaceMessage> requestStream, Grpc.Core.IServerStreamWriter <RaceMessage> responseStream, Grpc.Core.ServerCallContext context)
{
var raceDuration = TimeSpan.Parse(context.RequestHeaders.Single(h => h.Key == "race-duration").Value);
RaceMessage?lastMessageReceived = null;
var readTask = Task.Run(async() => {
await foreach (var message in requestStream.ReadAllAsync())
{
lastMessageReceived = message;
}
});
var sw = Stopwatch.StartNew();
var sent = 0;
while (sw.Elapsed < raceDuration)
{
await responseStream.WriteAsync(new RaceMessage { Count = ++sent });
}
await readTask;
}
public override async Task Mailbox(Grpc.Core.IAsyncStreamReader <ForwardMailMessage> requestStream, Grpc.Core.IServerStreamWriter <MailboxMessage> responseStream, Grpc.Core.ServerCallContext context)
{
var mailboxName = context.RequestHeaders.Single(e => e.Key == "mailbox-name").Value;
var mailQueue = _messageQueueRepository.GetMailQueue(mailboxName);
_logger.LogInformation($"Connected to {mailboxName}");
mailQueue.Changed += ReportChanges;
try
{
while (await requestStream.MoveNext())
{
if (mailQueue.TryForwardMail(out var message))
{
_logger.LogInformation($"Forwarded mail:{message.Content}");
}
else
{
_logger.LogWarning("No mail to forward.");
}
}
}
finally
{
mailQueue.Changed -= ReportChanges;
}
_logger.LogInformation($"{mailboxName} disconnected.");
async Task ReportChanges((int totalCount, int forwardCount, MailboxMessage.Types.Reason reason) state)
{
await responseStream.WriteAsync(new MailboxMessage
{
Forwarded = state.forwardCount,
New = state.totalCount - state.forwardCount,
Reason = state.reason
});
}
}