import { SkeletonClass } from "../skeleton";
import { PluginType, PluginList } from "../plugins";
import { RatelimitOptions, Quota } from "./ratelimit";
import { LoggerOptions } from "../logging";
import { Metadata } from "../metadata";
import { LocalRegistryOptions } from "../registry";
export declare type LimiterPluginList = Pick<PluginList, PluginType.LocalRegistry | PluginType.NamingService | PluginType.RatelimitService | PluginType.TrafficShaping | PluginType.TraceLogging | PluginType.StatReporter>;
export declare type LimiterOptions = RatelimitOptions & LoggerOptions & LocalRegistryOptions;
export interface AcquireResponse {
    /**
     * 唯一 ID
     * 用于优化下次查询性能
     */
    readonly id?: string;
    /**
     * 配额
     */
    readonly quotas: Quota[];
}
declare const kRatelimit: unique symbol;
declare const kRegistry: unique symbol;
export declare class Limiter extends SkeletonClass<LimiterPluginList> {
    /**
     * 当前可实例化的最大次数
     */
    static get maxInstances(): number;
    /**
     * 设置可实例化的最大次数
     * @param n 最大次数
     */
    static setMaxInstances(n: number): void;
    private readonly [kRatelimit];
    private readonly [kRegistry];
    /**
     * Create Limiter
     * @param plugins 插件（可选）
     * @param options 配置参数（可选）
     */
    constructor(plugins?: Partial<LimiterPluginList>, options?: Partial<LimiterOptions>);
    /**
     * 销毁（释放）所占资源
     *
     * @description
     * dispose order:
     *  Ratelimit -> Registry -> [plguins]
     *
     * @param sync 是否同步释放（可选）
     */
    dispose(sync?: boolean): void;
    /**
     * 通过条件获取配额分配对象
     * @param namespace 命名空间
     * @param service 服务名
     * @param amount 请求的配额数
     * @param cluster 集群名（可选）
     * @param labels 标签集合（可选）
     * @param id 唯一 ID（可选）
     */
    acquire(namespace: string, service: string, amount: number, cluster?: string, labels?: Metadata, id?: string): Promise<AcquireResponse>;
}
export {};