/**
 * Connection Manager
 * Manages database connections and sessions
 * Supports both single-connection (MCP) and multi-session (HTTP) modes
 */
import type { DbAdapter, DbConfig } from '../types/adapter.js';
import { DatabaseService, SchemaCacheConfig } from './database-service.js';
/**
 * Connection Manager Class
 */
export declare class ConnectionManager {
    private sessions;
    private cleanupInterval?;
    private sessionTimeout;
    private defaultCacheConfig;
    constructor(sessionTimeout?: number, cleanupInterval?: number, defaultCacheConfig?: Partial<SchemaCacheConfig>);
    /**
     * Create a new connection and return session ID
     */
    connect(config: DbConfig): Promise<string>;
    /**
     * Disconnect a session
     */
    disconnect(sessionId: string): Promise<void>;
    /**
     * Get adapter for a session
     */
    getAdapter(sessionId: string): DbAdapter;
    /**
     * Get database service for a session
     * Returns the cached DatabaseService instance to preserve schema cache
     */
    getService(sessionId: string): DatabaseService;
    /**
     * Check if session exists
     */
    hasSession(sessionId: string): boolean;
    /**
     * Get session count
     */
    getSessionCount(): number;
    /**
     * Get all session IDs
     */
    getSessionIds(): string[];
    /**
     * Clear schema cache for a specific session
     */
    clearSessionCache(sessionId: string): void;
    /**
     * Clear schema cache for all sessions
     */
    clearAllCaches(): void;
    /**
     * Cleanup expired sessions
     */
    private cleanupExpiredSessions;
    /**
     * Disconnect all sessions and stop cleanup
     */
    disconnectAll(): Promise<void>;
}
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