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fleet/server/mdm/android
Victor Lyuboslavsky a86253d2bf Refactoring Android datastore interface (#26982)
For #26219 

Refactoring the interface between Android service and Android datastore
to use 1 common datastore interface: `fleet.AndroidDatastore`

These changes are based on feedback from the recent Backend Sync.

```mermaid
---
title: Partial class diagram
---
classDiagram
    direction LR
    class `android.Service`
    <<interface>> `android.Service`
    class `android/service.Service`
    `android/service.Service` ..|> `android.Service`: implements

    class `fleet.AndroidDatastore`
    <<interface>> `fleet.AndroidDatastore`
    class `fleet.Datastore`
    <<interface>> `fleet.Datastore`
    class `android.Datastore`
    <<interface>> `android.Datastore`
    `android/service.Service` *-- `fleet.AndroidDatastore`: USES (THIS IS THE KEY CHANGE)
    `fleet.Datastore` *-- `fleet.AndroidDatastore`: contains
    `mysql.Datastore` ..|> `fleet.Datastore`: implements
    `fleet.AndroidDatastore` *-- `android.Datastore`: contains
    `mysql.Datastore` *-- `android.Datastore`: contains
    `android/mysql.Datastore` ..|> `android.Datastore`: implements
```
2025-03-13 14:28:52 -05:00
..

The MDM Android package attempts to decouple Android-specific service and datastore implementations from the core Fleet server code.

Any tightly coupled code that needs both the core Fleet server and the Android-specific features must live in the main server/fleet, server/service, and server/datastore packages. Typical example are MySQL queries. Any code that implements Android-specific functionality should live in the server/mdm/android package. For example, the common code from server/datastore package can call the android datastore methods as needed.

This decoupled approach attempts to achieve the following goals:

  • Easier to understand and find Android-specific code.
  • Easier to fix Android-specific bugs and add new features.
  • Easier to maintain Android-specific feature branches.
  • Faster Android-specific tests, including ability to run all tests in parallel.