Transactional Key Value Store Android App

An app that implements the following spec using an in-memory data store with the limitation of not using any third-party libraries.

Download the APK here.

SET <key> <value> // store the value for key
GET <key>         // return the current value for key
DELETE <key>      // remove the entry for key
COUNT <value>     // return the number of keys that have the given value
BEGIN             // start a new transaction
COMMIT            // complete the current transaction
ROLLBACK          // revert to state prior to BEGIN call

Setup

Ensure that you build the app using Java 11

Android Studio -> Settings/Preferences -> Build, Execution, Deployment -> Build Tools -> Gradle -> Set "Gradle JDK" to '11'

Module structure

• :app - Code that launches the app & integration tests
• :data - The in-memory data source
• :repository - Repositories used for interacting with data sources
• :feature:cli:ui - View layer for the CLI feature (composables, viewmodels, etc.)
• :feature:cli:domain - Domain layer for the CLI feature (usecases)
• :core:ui - View layer utilities
• :core:di - Dependency injection utilities
• :core:test - Unit test utilities, also exposes all required unit test dependencies