import type { MongoClient } from 'mongodb';
import { type Registry } from 'prom-client';
import type { MongoDBDriverExporterOptions } from './exporter';
export declare class MongoDBDriverExporter {
    private readonly register;
    private readonly mongoClient;
    private readonly options;
    private readonly defaultOptions;
    private readonly poolSize;
    private readonly minSize;
    private readonly maxSize;
    private readonly checkedOut;
    private readonly waitQueueSize;
    private readonly waitQueueSeconds;
    private readonly MONGODB_DRIVER_POOL_SIZE;
    private readonly MONGODB_DRIVER_POOL_MIN;
    private readonly MONGODB_DRIVER_POOL_MAX;
    private readonly MONGODB_DRIVER_POOL_CHECKEDOUT;
    private readonly MONGODB_DRIVER_POOL_WAITQUEUESIZE;
    private readonly MONGODB_DRIVER_POOL_WAITQUEUE_SECONDS;
    private readonly commands;
    private readonly MONGODB_DRIVER_COMMANDS_SECONDS;
    constructor(mongoClient: MongoClient, register: Registry, options?: MongoDBDriverExporterOptions);
    enableMetrics(): void;
    private monitorCommands;
    private onConnectionPoolCreated;
    private onConnectionCreated;
    private onConnectionClosed;
    private onConnectionCheckOutStarted;
    private onConnectionCheckedOut;
    private onConnectionCheckOutFailed;
    private onConnectionCheckedIn;
    private onConnectionPoolClosed;
    private onCommandSucceeded;
    private onCommandFailed;
}