Sys - All instances share the same state

[adrian-moisa]

Due to the current migration we have a major issue around. All the running instances share the same states due to the singleton pattern. We need to find a solution such that each instance gets a unique state classes.

[adrian-moisa]

After a major overhaul of the code that manages the state store I've been able to setup one store per controller instance. Now it is possible to run 2 instances of Visual Editor in parallel. I've written a full document explaining how the state store works and how to extend it. Notice that it is a custom internal solution (pure dart and streams) but it applies all the principles of unidirectional, pure data, global state store architecture (such as redux/ngrx). Some amount of prop drilling was reintroduced but far less pervasive compared to the old architecture, and most importantly, a lot easier to trace. As long as you know the rules of the state store you wont have any issues fixing or extending it.