/// <reference types="node" />
/// <reference types="node" />
import * as cluster from 'cluster';
import * as Hub from 'cluster-hub';
import { ClusterHubModuleOptions } from './interfaces/cluster-hub-module-options.interface';
export declare class ClusterHub extends Hub {
    private options?;
    private static instance;
    private ring;
    private locals;
    private numWorkers;
    private numWorkersReady;
    private workersReadyCallback?;
    constructor(options?: ClusterHubModuleOptions);
    static getInstance(options?: ClusterHubModuleOptions): ClusterHub;
    sendToWorker(worker: cluster.Worker | string, type: string, data?: any): boolean;
    requestWorker(worker: cluster.Worker | string, type: string, data?: any, callback?: Hub.Callback): boolean;
    get(key: string, callback?: Hub.Callback): boolean;
    set(key: string, value: any, callback?: Hub.Callback): boolean;
    getWorker(key: string): cluster.Worker;
    getWorkers(): NodeJS.Dict<cluster.Worker>;
    waitWorkers(callback: () => void): void;
    private setupWorkers;
    private setupLocals;
}