SignalR different hubs

Question

Is it right to create hubs for each specific case?

WS: /public-hub- Home Page
events:
onRates

WS: /client/accounts-hub - Client Accounts Page
events:
onBalance
onAccount
onOperations

WS: /operator/notifications-hub - Operator Notifications Page
events:
onNotification

WS: /admin/report-hub - Admin Report Page
events:
onIncome
onQuotes

WS: /admin/accounts-hub - Admin Accounts Page
events:
onAccount

Or do I need to create one hub and many groups?

Thanks for help !

Answer 1

Hi @Vladislav Emelyanov ,
I suggest you look at the instructions in the documentation:
Hub object lifetime

You don't instantiate the Hub class or call its methods from your own code on the server; all that is done for you by the SignalR Hubs pipeline. SignalR creates a new instance of your Hub class each time it needs to handle a Hub operation such as when a client connects, disconnects, or makes a method call to the server.

Because instances of the Hub class are transient, you can't use them to maintain state from one method call to the next. Each time the server receives a method call from a client, a new instance of your Hub class processes the message. To maintain state through multiple connections and method calls, use some other method such as a database, or a static variable on the Hub class, or a different class that does not derive from Hub. If you persist data in memory, using a method such as a static variable on the Hub class, the data will be lost when the app domain recycles.

https://learn.microsoft.com/en-us/aspnet/signalr/overview/guide-to-the-api/hubs-api-guide-server#hub-object-lifetime
Multiple Hubs

You can define multiple Hub classes in an application. When you do that, the connection is shared but groups are separate:

https://learn.microsoft.com/en-us/aspnet/signalr/overview/guide-to-the-api/hubs-api-guide-server#multiple-hubs
Best regards,
Lan Huang

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