Access ClientContext values in Xamarin.Forms after call from native Android

[tkyle]

Let's say I have a value that exists in the ClientContext:

Csla.ApplicationContext.ClientContext["TestKey"] = "Client Context Value";

When I access that value in shared code from a call initiated in shared code, that value exists. If I try to access that value from shared code in a call initiated in native code, it does not exist.

As an example, let's say there's a Firebase specific override that's initiated by the Firebase SDK. If I want to then make a call from that override (native), into shared code, using a static method in shared code, the ClientContext is missing the value.

Is this expected? Am I doing something wrong?

I've attached a sample of what I'm talking about in case it's not expected behavior and what I'm saying is hard to follow.

ClientContextTest.Mobile.zip

[rockfordlhotka]

It is important to understand how ClientContext works.

It is maintained (by default) in an AsyncLocal variable, which means that it is available on the parent thread, and should flow through to child threads if/when they are created using things like Task.Run.

The data portal flows ClientContext through to a remote server by serializing the context on the client, and deserializing it on the server.

I suspect that when the Android native code calls back into your app, that the code in your app isn't running on a child thread of the original parent, and so has no access to ClientContext.

Because an Android app is basically just like any other smart client app, you might be able to create your own context manager that stores ClientContext in a static, making it global to the app's process. In older versions of CSLA (like 4) I think this was the approach used in WPF - so in Csla.Xaml. I say this, because you can find an example of the context manager implementation I'm talking about.

I still don't know for sure if this will work, but it is probably worth a try.

[tkyle]

That makes sense. Thanks for the reply.

I will look into this and see what I come up with.