Handle more than one netowk in DB

[mpiffari]

Hi @philips77 and @roshanrajaratnam ,
Is it possible to add more than one mesh network to the database and to load them from DB? If so, are there any specific steps or limitations to consider?

I saw that in MeshNetworkDao is available the CRUD for insert a new mesh entry in the DB, but it seems not to be called in the mesh manager.

The fields isLastSelected can be edited and updated in DB? @roshanrajaratnam
Is it possible to expose getMeshNetworks? A PR would be accepted by your team (both on Android and iOS libraries)?

[philips77]

Hello,
I don't think so. Why do you need that? You could merge the 2 networks if key indexes don't overlap, but if they do, you may try importing / exporting network when needed so switch between them.

Also, we're almost done with a new implementation of mesh library for Android, written in Kotlin from scratch. Not backwards compatible so far, but we'll think about migration guides. As far as I know it won't use database under the hood, right @roshanrajaratnam?

[mpiffari]

I need to manage multiple networks simultaneously, including creating, deleting, and adding nodes to different networks.

However, I'm encountering challenges in maintaining consistency for the field isLastSelected and ensuring database integrity. Is there a more efficient workaround to streamline this process? On Android, I currently have to use reflection to access _meshNetworkDao to create new networks, which feels suboptimal.

[roshanrajaratnam]

Also, we're almost done with a new implementation of mesh library for Android, written in Kotlin from scratch. Not backwards compatible so far, but we'll think about migration guides. As far as I know it won't use database under the hood, right @roshanrajaratnam?

The new implementation will not be using any databases and we are using datastore. The new library will create a datastore per network and will be using the configuration database format.

However, I'm encountering challenges in maintaining consistency for the field isLastSelected and ensuring database integrity. Is there a more efficient workaround to streamline this process? On Android, I currently have to use reflection to access _meshNetworkDao to create new networks, which feels suboptimal.

Use the following API to create a new network, this should allow to create a new network and you do not have to use reflections.

https://github.com/NordicSemiconductor/Android-nRF-Mesh-Library/blob/37de84ddb24eeab044d041244b246ebf683cde22/mesh/src/main/java/no/nordicsemi/android/mesh/MeshManagerApi.java#L810

[mpiffari]

Hi @roshanrajaratnam ,
Will the new library also be made public, like the current one? From the iOS perspective, will there be any changes, or will it continue using local storage and saving data in JSON format as before?

Regarding the creation and management of mesh networks: to create a mesh network and store it in the database entity, I call createMeshNetwork. However, to retrieve the list of all available networks and ensure the last_selected field remains consistent (in my design, only one network at a time can have 'last_selected' set to true - maybe this point is the key), I need to access the database manager to invoke the following APIs:

Fun1
Fun2

public List<MeshNetwork> getMeshNetworks()
public void update(final String uuid, final boolean lastSelected)[Fun2](https://github.com/NordicSemiconductor/Android-nRF-Mesh-Library/blob/37de84ddb24eeab044d041244b246ebf683cde22/mesh/src/main/java/no/nordicsemi/android/mesh/data/MeshNetworkDao.java#L26)

Is there an efficient way to manage multiple networks, allowing the user to seamlessly select, edit, and interact with their chosen network?
Thank you in advance for any guidance or suggestions—it’s greatly appreciated!

[philips77]

From the iOS perspective, will there be any changes, or will it continue using local storage and saving data in JSON format as before?

No plans in changing it. The lib actually allows you to set custom Storage to save the json (as Data).

Will the new library also be made public, like the current one?

We're working hard to make it as soon as possible. I would say few weeks.

[roshanrajaratnam]

@mpiffari FYI the Kotlin Mesh library is out. Here's the link