import { Response } from 'express';
import { Connection } from 'mongoose';
/**
 * Controller providing a Kubernetes liveness probe endpoint to verify
 * the health of the MongoDB connection. Kubernetes uses this endpoint
 * to determine if the application is alive and able to communicate with the database.
 */
export declare class DatabaseLivenessProbeController {
    private readonly connection;
    /**
     * Receives an injected Mongoose connection instance for database health checks.
     *
     * @param connection - The active Mongoose database connection
     */
    constructor(connection: Connection);
    /**
     * GET /alive
     *
     * Endpoint for Kubernetes liveness probe to determine MongoDB connection health.
     * If the database is connected and responsive to a ping, a 200 response is returned.
     * Otherwise, the application returns a 500 error to indicate failure.
     *
     * @param res {Response} - Express response object used to return HTTP status
     * @returns {Promise<void>} - Sends status response directly via Express
     */
    getLivenessStatus(response: Response): Promise<void>;
}