How to handle multiple events concurrently in C# client

Question

I have a SignalR client application, written in C#, that subscribe an event from the Hub. When the Event is "fired" the application executes a method.

The question is that all events of that kind, to that client, are processed in sequentially.

Use Case / Flow:

1. In a Browser, an user clicks a button
2. The button triggers a call to a SignalR Hub
3. The SignalR Hub send the message to a specific SignalR client
4. The SignalR Client receives the event/message
5. The SignalR Client invoke a method that will store the message in a Database
6. The SignalR Client invoke a method in the Hub to return the result
7. The Hub deliver to the user the result

If another user clicks the button at the same time, the SignalR Client will only store one message at a time.

Client Example:

myHub.On<ExecuteRequestModel, string>("Execute", (request, to) =>
{
    logger.Info("Execute request received for connectionID: " + connection.ConnectionId);

    myMethod();

    myHub.Invoke("ExecuteResult", response, to);

    logger.Info("Execute request processed");
    logger.Info("...");
});

There's any recommended practice to handle multiple events in a concurrent way?

Answer 1

That can be solved using Async/Await. The Async function will be responsible to reply to the Hub the result.

myHub.On<ExecuteRequestModel, string>("Execute", async (request, to) => 
    await onExecute(request, to)
);