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These interfaces and classes are in magnolia-ui-framework. The implementation AppController and the location handling are in magnolia-ui-admincentral.

Proposed Implementation

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From An App Developers perspective

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1. Convert abstract *Apps (AbstractApp, AbstractSubApp, ...) to concrete classes (BaseApp, BaseSubApp, ...)
2. Interface for AppFrameView (AppView), inject interface into AbstractApp
3. Make AbstractApp listen to AppFrameView Events (on tab close, on tab change)
   
   1. delegate to AppContext
4. BaseApp
5. AppView.Listener implemented by AppContext -> listens to AppView events
   
   1. remove tab dependency from events
6. Remove vaadin dependencies from AppContext
7. Renaming Rename AppContextImpl ->AppInstanceControllerImpl
8. AppContextImpl could implement AppInstanceControllerImpl implements two interfaces:
   
   1. AppContext for contextual information releveant relevant for the app 
   2. AppInstanceController exposing the contract to the AppController 

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