import { CubeApi } from '@cubejs-client/core';
import { LogManager } from '../../../common/port/log/log.manager.port';
export interface CubeConnectionPoolConfig {
    maxConnections?: number;
    idleTimeout?: number;
    connectionTimeout?: number;
    retryAttempts?: number;
    retryDelay?: number;
}
export declare class CubeConnectionPool {
    private readonly logManager;
    private readonly endpoint;
    private connections;
    private config;
    private cleanupInterval;
    constructor(logManager: LogManager, endpoint: string, config?: CubeConnectionPoolConfig);
    /**
     * Get a connection from the pool or create a new one
     */
    getConnection(token: string): Promise<CubeApi>;
    /**
     * Release a connection back to the pool
     */
    releaseConnection(token: string, client: CubeApi): void;
    /**
     * Close all connections and cleanup
     */
    close(): Promise<void>;
    /**
     * Get pool statistics
     */
    getStats(): Record<string, any>;
    private createConnection;
    private waitForConnection;
    private isConnectionValid;
    private getTokenKey;
    private startCleanupInterval;
    private cleanupIdleConnections;
}
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