release

Gracefully releases database resources and closes the connection.

This method performs cleanup operations to properly close the SQLite database connection and release associated system resources. It should be called during application shutdown or when the RealDataStorage instance is no longer needed.

Resource Management:

• Connection Closure: Closes active SQLite JDBC connection

• Memory Cleanup: Releases connection-related memory resources

• Handle Cleanup: Cleans up database file handles and locks

• State Validation: Checks connection initialization and status before closure

Cleanup Process:

1. Initialization Check: Verifies connection was properly initialized

2. Status Validation: Confirms connection is not already closed

3. Connection Closure: Invokes JDBC connection close method

4. Confirmation Logging: Reports successful resource release

Error Handling:

• SQLException: Connection closure errors with detailed logging

• Graceful Degradation: Errors logged but don't prevent application shutdown

• State Safety: Safe to call multiple times or on uninitialized instances

• Exception Isolation: Prevents resource cleanup errors from propagating

Threading Context:

• Executes on Dispatchers.IO for consistent database operation context

• Non-blocking operation suitable for shutdown sequences

• Safe to call from any coroutine context

Lifecycle Integration:

class Application {
    private val storage = RealDataStorage()

    suspend fun initialize() {
        storage.initialize()
    }

    suspend fun shutdown() {
        storage.release()  // Proper cleanup
    }
}

Connection State Management:

• Idempotent: Safe to call multiple times

• State Aware: Checks both initialization and connection status

• Resource Safe: No resource leaks even if called repeatedly

• Shutdown Compatible: Suitable for application shutdown hooks

Best Practices:

• Call during application shutdown or dependency injection cleanup

• Include in try-finally blocks for guaranteed cleanup

• Use in conjunction with proper connection lifecycle management

• Consider implementing AutoCloseable interface for automatic resource management

SQLite-Specific Considerations:

• File Locking: Releases SQLite database file locks

• WAL Mode: Properly closes Write-Ahead Logging if enabled

• Journal Files: Ensures temporary journal files are cleaned up

• Connection Pool: Single connection model simplifies cleanup

See also