import { Connection } from 'mongoose';
export declare class MemCacheConnections {
    /**
     * k is ${domain} or ${domain}_date
     */
    getConnectionMaps(): {
        [k: string]: Connection | string;
    };
    setConnection(domain: string, conn: Connection, force?: boolean): void;
    getConnection(domain: string): Connection | null;
    /**
     * Checks if a connection is ready (connected state)
     * @param domain - Domain identifier
     * @returns true if connection exists and is ready, false otherwise
     */
    isConnectionReady(domain: string): boolean;
    /**
     * Gets connection and verifies it's ready
     * @param domain - Domain identifier
     * @returns Connection if ready, null otherwise
     */
    getReadyConnection(domain: string): Connection | null;
    /**
     * Validates connection is truly ready (not just readyState check)
     * This is a lightweight check - for full validation use ensureConnectionReady from connectionHelpers
     * @param domain - Domain identifier
     * @returns true if connection exists, is ready, and has db available
     */
    isValidConnection(domain: string): boolean;
    closeConnection(domain: string): Promise<void>;
    removeConnection(domain: string): void;
    /**
     * Gets all active connections
     * @returns Array of all connection objects
     */
    getAllConnections(): Connection[];
}