SQLite Feature Store

The ff4k-store-sqlite module provides a SQLite-based FeatureStore and PropertyStore implementation using SQLDelight.

Supported Platforms

• JVM
• Android
• iOS / Native

Installation

dependencies {
    implementation("com.yonatankarp:ff4k-store-sqlite:<version>")
}

Usage

JVM

val driver = JdbcSqliteDriver("jdbc:sqlite:ff4k.db")
SqliteDatabase.Schema.create(driver).await()

val featureStore = SqliteFeatureStore(driver)
val propertyStore = SqlitePropertyStore(driver)

Android

val driver = AndroidSqliteDriver(
    schema = SqliteDatabase.Schema,
    context = context,
    name = "ff4k.db"
)

val featureStore = SqliteFeatureStore(driver)
val propertyStore = SqlitePropertyStore(driver)

iOS / Native

val driver = NativeSqliteDriver(SqliteDatabase.Schema, "ff4k.db")

val featureStore = SqliteFeatureStore(driver)
val propertyStore = SqlitePropertyStore(driver)

Custom Serializers

For custom FlippingStrategy or Property implementations:

val customModule = SerializersModule {
    polymorphic(FlippingStrategy::class) {
        subclass(MyCustomStrategy::class)
    }
}

val featureStore = SqliteFeatureStore(driver, customModule)
val propertyStore = SqlitePropertyStore(driver, customModule)

Features

• Multiplatform - JVM, Android, iOS, and Native from a single module
• Automatic schema creation - Tables and indexes created via SQLDelight migrations
• Optimistic locking - Safe concurrent updates with retry
• Property store - Stores both feature flags and typed properties