KARL Room Storage
The KARL Room Storage module provides a robust, production-ready data persistence layer using Android's Room database library. It implements the complete DataStorage contract with support for user data isolation, efficient querying, and transactional safety guarantees.
Key Features
Database Architecture
Entity-Based Design: Uses Room entities to map domain models to SQL tables
DAO Pattern: Leverages Data Access Objects for type-safe database operations
Transaction Support: Ensures atomic operations for data consistency
Migration Support: Built-in schema versioning for database evolution
Performance Characteristics
Thread Safety: All database operations dispatched to IO thread pool
Connection Pooling: Leverages Room's built-in connection management
Query Optimization: Uses indexed queries for efficient data retrieval
Memory Efficiency: Minimal object allocation through entity reuse
Data Isolation
User data is strictly partitioned by userId, ensuring complete privacy isolation between different users of the same application. This supports multi-user scenarios and privacy compliance requirements.
Core Components
RoomDataStorage- Main DataStorage implementationKarlDao- Data Access Object with comprehensive query methodsKarlRoomDatabase- Database configuration and entity definitionsKarlRoomDatabaseFactory- Platform-specific database creation
Entity Models
KarlContainerStateEntity- Container state persistenceInteractionDataEntity- User interaction data loggingMapConverter- Type converters for complex data structures
Advanced Features
Temporal Queries: Time-based filtering and analysis capabilities
Bulk Operations: Efficient batch data management
Pagination Support: Handle large datasets with limit parameters
User Data Management: Comprehensive deletion and cleanup operations
Coroutine Integration
All operations are implemented as suspending functions that work seamlessly with Kotlin coroutines. Database operations are automatically dispatched to the IO dispatcher to prevent blocking the main thread.
Dependencies
KARL Core module
AndroidX Room (Common, Runtime, Compiler)
Kotlinx Serialization JSON
Kotlinx Coroutines
Usage
val storage = RoomDataStorage(karlDao)
storage.initialize()
storage.saveContainerState(userId, state)This module provides enterprise-grade data persistence for KARL applications.
The KARL Room Storage module provides a robust, production-ready data persistence layer using Android's Room database library. It implements the complete DataStorage contract with support for user data isolation, efficient querying, and transactional safety guarantees.
Key Features
Database Architecture
Entity-Based Design: Uses Room entities to map domain models to SQL tables
DAO Pattern: Leverages Data Access Objects for type-safe database operations
Transaction Support: Ensures atomic operations for data consistency
Migration Support: Built-in schema versioning for database evolution
Performance Characteristics
Thread Safety: All database operations dispatched to IO thread pool
Connection Pooling: Leverages Room's built-in connection management
Query Optimization: Uses indexed queries for efficient data retrieval
Memory Efficiency: Minimal object allocation through entity reuse
Data Isolation
User data is strictly partitioned by userId, ensuring complete privacy isolation between different users of the same application. This supports multi-user scenarios and privacy compliance requirements.
Core Components
RoomDataStorage- Main DataStorage implementationKarlDao- Data Access Object with comprehensive query methodsKarlRoomDatabase- Database configuration and entity definitionsKarlRoomDatabaseFactory- Platform-specific database creation
Entity Models
KarlContainerStateEntity- Container state persistenceInteractionDataEntity- User interaction data loggingMapConverter- Type converters for complex data structures
Advanced Features
Temporal Queries: Time-based filtering and analysis capabilities
Bulk Operations: Efficient batch data management
Pagination Support: Handle large datasets with limit parameters
User Data Management: Comprehensive deletion and cleanup operations
Coroutine Integration
All operations are implemented as suspending functions that work seamlessly with Kotlin coroutines. Database operations are automatically dispatched to the IO dispatcher to prevent blocking the main thread.
Dependencies
KARL Core module
AndroidX Room (Common, Runtime, Compiler)
Kotlinx Serialization JSON
Kotlinx Coroutines
Usage
val storage = RoomDataStorage(karlDao)
storage.initialize()
storage.saveContainerState(userId, state)This module provides enterprise-grade data persistence for KARL applications.