import type { MongoClient } from 'mongodb';
import type { Registry } from 'prom-client';
/**
 * Exposes metrics for the provided Mongo client in prometheus format.
 *
 * @param mongoClient The mongoClient for which to expose metrics in prometheus format.
 * @param register the prometheus registry used to expose the metrics.
 * @param options optional parameters to configure the exporter
 */
export declare function monitorMongoDBDriver(mongoClient: MongoClient, register: Registry, options?: MongoDBDriverExporterOptions): void;
/**
 * Optional parameter to configure the exporter.
 */
export interface MongoDBDriverExporterOptions {
    logger?: Logger;
    /**
     * Buckets for the mongodb_driver_commands_seconds_bucket metric. Default buckets are [0.001, 0.005, 0.010, 0.020, 0.030, 0.040, 0.050, 0.100, 0.200, 0.500, 1.0, 2.0, 5.0, 10]
     */
    mongodbDriverCommandsSecondsHistogramBuckets?: number[];
    /**
     * Buckets for the mongodb_driver_pool_waitqueue_seconds metric. Default buckets are [0.001, 0.005, 0.010, 0.020, 0.030, 0.040, 0.050, 0.100, 0.200, 0.500, 1.0, 2.0, 5.0, 10]
     */
    waitQueueSecondsHistogramBuckets?: number[];
    /**
     * Default labels for all metrics, e.g. {'foo':'bar', alice: 3}
     */
    defaultLabels?: Record<string, string | number>;
    /**
     * Name prefix for all metrics, e.g. 'service1_'
     */
    prefix?: string;
}
/**
 * Logger which is used to print information from the exporter
 */
export interface Logger {
    /**
     * Prints info messages
     * @param message the message to print
     * @returns void
     */
    info: (message: string) => void;
    /**
     * Prints warn messages
     * @param message the warn message to print
     * @returns void
     */
    warn: (message: string) => void;
    /**
     * Prints error messages
     * @param message the error message to print
     * @returns void
     */
    error: (message: string) => void;
}