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If there is more than one request occurring from different clients simultaneously then the value of Hub.Context.ConnectionId changes during the execution of the handler.
Say I've got 2 clients connected with client Ids A and B, and I've got a method on my Hub called foo(). I send a request from A to the Server invoking foo(), then whilst the request from A is being processed I send a request from B invoking foo(). At the start of the processing of A's request Hub.Context.ConnectionId == A but at the end of the method call Hub.Context.ConnectionId == B.
Should I be copying the Hub.Context? At what point should I do this?
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What is a SignalR hub. The SignalR Hubs API enables you to call methods on connected clients from the server. In the server code, you define methods that are called by client. In the client code, you define methods that are called from the server.
SignalR doesn't guarantee message delivery. Since SignalR doesn't block when you call client methods, you can invoke client methods very quickly as you've discovered.
It doesn't need to be thread safe since Hub instances aren't static so you don't need to copy anything.
They are created per call. So each call from the client will create a new Hub instance and HubContext.
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