/**
 * Metrics plugin for NestJS RedisX.
 * Provides Prometheus metrics collection and export.
 */
import { DynamicModule, ForwardReference, Provider, Type } from '@nestjs/common';
import { IRedisXPlugin, IPluginAsyncOptions } from '@nestjs-redisx/core';
import { IMetricsPluginOptions } from './shared/types';
/**
 * Metrics plugin for NestJS RedisX.
 *
 * Provides Prometheus metrics:
 * - Redis command latency
 * - Connection pool stats
 * - Cache hit/miss rates
 * - Error counts
 * - HTTP endpoint for Prometheus scraping
 *
 * @example
 * ```typescript
 * @Module({
 *   imports: [
 *     RedisModule.forRoot({
 *       clients: { host: 'localhost', port: 6379 },
 *       plugins: [
 *         new MetricsPlugin({
 *           enabled: true,
 *           exposeEndpoint: true,
 *           endpoint: '/metrics',
 *         }),
 *       ],
 *     }),
 *   ],
 * })
 * export class AppModule {}
 * ```
 */
export declare class MetricsPlugin implements IRedisXPlugin {
    private readonly options;
    readonly name = "metrics";
    readonly version: string;
    readonly description = "Prometheus metrics collection and export";
    private asyncOptions?;
    constructor(options?: IMetricsPluginOptions);
    static registerAsync(asyncOptions: IPluginAsyncOptions<IMetricsPluginOptions>): MetricsPlugin;
    private static mergeDefaults;
    getImports(): Array<Type<unknown> | DynamicModule | ForwardReference>;
    getProviders(): Provider[];
    getExports(): Array<string | symbol | Provider>;
    getControllers(): Type[];
}
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