import * as prometheus from '@prometheus-io/client';
import type { FastifyBaseLogger } from 'fastify';
import type { QueueDiscoverer } from './queueDiscoverers.js';
export type Metrics = {
    countGauge: prometheus.Gauge<'status' | 'queue'>;
    processedDuration: prometheus.Histogram<'status' | 'queue'>;
    finishedDuration: prometheus.Histogram<'status' | 'queue'>;
};
export type MetricCollectorOptions = {
    bullMqPrefix: string;
    metricsPrefix: string;
    queueDiscoverer: QueueDiscoverer;
    excludedQueues: string[];
    histogramBuckets: number[];
};
export declare class MetricsCollector {
    private readonly metrics;
    private readonly options;
    private readonly registry;
    private readonly logger;
    private observedQueues;
    constructor(options: MetricCollectorOptions, registry: prometheus.Registry, logger: FastifyBaseLogger);
    /**
     * Updates metrics for all discovered queues
     */
    collect(): Promise<void>;
    /**
     * Stops the metrics collection and cleans up resources
     */
    dispose(): Promise<void>;
    private registerMetrics;
}