import * as api from '@opentelemetry/api';
import * as metrics from '@opentelemetry/metrics';
/**
 * Metrics Collector Configuration
 */
export interface MetricsCollectorConfig {
    maxTimeoutUpdateMS?: number;
    meterProvider?: metrics.MeterProvider;
    metricNameSeparator?: string;
    name: string;
    url?: string;
}
/**
 * Base Class for metrics
 */
export declare abstract class BaseMetrics {
    protected _logger: api.DiagAPI;
    protected _maxTimeoutUpdateMS: number;
    protected _meter: metrics.Meter;
    private _name;
    private _boundCounters;
    private _metricNameSeparator;
    constructor(config: MetricsCollectorConfig);
    /**
     * Creates a metric key name based on metric name and a key
     * @param metricName
     * @param key
     */
    protected _boundKey(metricName: string, key: string): string;
    /**
     * Updates counter based on boundkey
     * @param metricName
     * @param key
     * @param value
     */
    protected _counterUpdate(metricName: string, key: string, value?: number): void;
    /**
     * @param metricName metric name - this will be added as label under name
     *     "name"
     * @param values values to be used to generate bound counters for each
     * value prefixed with metricName
     * @param description metric description
     */
    protected _createCounter(metricName: string, values: string[], description?: string): void;
    /**
     * Creates metrics
     */
    protected abstract _createMetrics(): void;
    /**
     * Starts collecting stats
     */
    abstract start(): void;
}