crewai-ts/memory/storage/SQLiteStorageAdapter.d.ts

TypeScript port of crewAI for agent-based workflows

/**
 * SQLiteStorageAdapter
 *
 * A SQLite-based implementation of the StorageAdapter interface
 * Optimized for efficient local persistence with high performance
 */
import { BaseStorageAdapter, StorageAdapterOptions } from './StorageAdapter.js';
/**
 * SQLiteStorageAdapter Options
 */
export interface SQLiteStorageOptions extends StorageAdapterOptions {
    /**
     * Path to SQLite database file
     */
    dbPath: string;
    /**
     * Schema version for automatic migrations
     */
    schemaVersion?: number;
    /**
     * Enable WAL mode for better performance
     */
    enableWAL?: boolean;
    /**
     * Enable query caching for better performance
     */
    enableQueryCache?: boolean;
    /**
     * Cache size in memory items
     */
    cacheSize?: number;
}
/**
 * SQLiteStorageAdapter implements the StorageAdapter interface
 * using SQLite for efficient and durable storage
 *
 * Note: This implementation requires the 'better-sqlite3' package
 * npm install better-sqlite3
 */
export declare class SQLiteStorageAdapter extends BaseStorageAdapter {
    private db;
    private statements;
    private cache;
    private cacheSize;
    private initialized;
    private addCacheMutex;
    constructor(options: SQLiteStorageOptions);
    /**
     * Set up the database schema
     */
    private setupDatabase;
    /**
     * Prepare common SQL statements
     */
    private prepareStatements;
    /**
     * Migrate database schema
     */
    private migrateSchema;
    /**
     * Ensure database is initialized
     */
    private ensureInitialized;
    /**
     * Add an item to the cache with LRU eviction
     */
    private addToCache;
    /**
     * Save a value with transaction support
     */
    save(key: string, value: any): Promise<void>;
    /**
     * Load a value with caching
     */
    load(key: string): Promise<any | null>;
    /**
     * Delete a value with proper cleanup
     */
    delete(key: string): Promise<boolean>;
    /**
     * Clear all values for the current namespace
     */
    clear(): Promise<void>;
    /**
     * Get all keys with namespace and expiration handling
     */
    keys(): Promise<string[]>;
    /**
     * Close the database connection
     */
    close(): Promise<void>;
    /**
     * Run vacuum to optimize database
     */
    optimize(): Promise<void>;
    /**
     * Get storage statistics
     */
    getStats(): {
        itemCount: number;
        cacheSize: number;
        dbSize: number;
    };
}
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