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I have been looking online and have been reading that you cant use HttpContext.Current.Cache in a signalR hub class, so what would be the workaround if i wanted to be able to have each user have some cache data that is accessed in my hub methods.
EDIT:
This data would only need to be used inside my hub class, I would not need to access it elsewhere in my asp.net application. It would definitely need to be user specific though.
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SignalR requires that all HTTP requests for a specific connection be handled by the same server process. When SignalR is running on a server farm (multiple servers), "sticky sessions" must be used. "Sticky sessions" are also called session affinity by some load balancers.
In the default mode, the app server creates five server connections with Azure SignalR Service. The app server uses the Azure SignalR Service SDK by default. In the following performance test results, server connections are increased to 15 (or more for broadcasting and sending a message to a big group).
The default keepalive timeout period is currently 20 seconds. If your client code tries to call a Hub method while SignalR is in reconnecting mode, SignalR will try to send the command.
If you're only looking for the equivalent capabilities of the built in ASP.NET cache then you can simply spin up a static instance of System.Runtime.Caching.MemoryCache class. Then just access the static instance in your various hub methods.
Keep in mind this is a single server, in-memory solution. For more advanced, out of process, distributed caching solutions I would look to AppFabric (Azure or on-premises) or Memcached.
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