Investigate ViewModel support + RetainedInstanceStore

[KovalevAndrey]

Check if it makes sense to implement ViewModel support on top of RetainedInstanceStore. Similarly to this, one of the possible solutions:

1. Node implements ViewModelStoreOwner interface
2. RetainedInstanceStore stores and clears ViewModelStore for every Node

[saket]

This will be really nice. I'm trying out appyx again today and I'm trying to figure out how to retain my presenter across config changes but only at a per node level.

[KovalevAndrey]

Hi @saket you can already retain your presenter per Node level. Please check com.bumble.appyx.sandbox.client.mvicoreexample.MviCoreExampleBuilder where we retain feature. To make it work per node level you simply need to provide the id of the node like this:

val feature = buildContext.getRetainedDisposable(buildContext.identifier) {
        MviCoreExampleFeature(payload)
 }

For non-rx classes check com.bumble.appyx.core.store.getRetainedInstance

[saket]

Oh whoops I completely missed that. Apologies!

[tausifcreates]

Any updates on how do we use viewModels with this?

[KovalevAndrey]

Hi @LittleTasteOfHeaven, the ViewModel support is not integrated into the library yet, however, we have support for retaining objects. Similar functionality can be achieved using the RetainedInstance API. Please check docs here

[tausifcreates]

Thank you @KovalevAndrey ! Any eta when viewmodel support will land on appyx?