Saving code of current tenant is missing about presentations

[iyilm4z]

Roger that! Thank you very much for your detailed answer. I actually were expecting that you should use a key to store current tenant info like here. Now i understood that you did a simplified implementation of AsyncLocal for your presentation:)

[hikalkan]

Hi,

Do you mean "How to change current tenant?". If so, It's done with this.

[iyilm4z]

Hi,
No i didn't mean that. As i understood of your talk, you said "Our application is stateless but we need to store the state of current tenant(even when we change it) after we receive the http request. Of course we musn't store it in a static variable(because it's not thread safe) but we must store it somewhere for per thread but where? The answer is AsyncLocal. We should store it by using AsyncLocal just like httpcontext internally does." I think that "storing part" is missing. The implementation of Ambient Context is missing. But you did it in ABP's this class. And you guys use it here with the help of scoping functionalty of DataContextAmbientScopeProvider. Please check out the video link on my first comment. You will understand what i meant because you yourself said that you forgot to implement that part.

[hikalkan]

AsyncLocal variable is here: https://github.com/hikalkan/presentations/blob/master/2018-04-06-Multi-Tenancy/src/MultiTenancyDraft/Infrastructure/TenantInfo.cs#L13 This stores the current tenant value for current web request.

Change method stores current tenant to the AsyncLocal variable, so it will be usable by the entire request.

Where/How the Change method is called? It's done in a middleware: https://github.com/hikalkan/presentations/blob/master/2018-04-06-Multi-Tenancy/src/MultiTenancyDraft/Infrastructure/MultiTenancyMiddleware.cs#L20

And finally the middleware is added to the asp.net core pipeline: https://github.com/hikalkan/presentations/blob/master/2018-04-06-Multi-Tenancy/src/MultiTenancyDraft/Startup.cs#L28