/// <reference types="node" />
import * as Redlock from 'redlock';
import { RedisConfig } from '../redis/connect';
export declare type UnlockFunction = () => Promise<void>;
export declare function connectToRedisLocker(cfg: RedisConfig): void;
export declare class AsyncLocker {
    private resource;
    protected static server: Redlock;
    MAX_HOLD: number;
    TIMEOUT: number;
    protected holdList: {
        [id: string]: NodeJS.Timer;
    };
    private lockCount;
    protected lockTimer: NodeJS.Timer;
    protected lockerList: {
        [id: string]: Redlock.Lock;
    };
    constructor(resource: string);
    lock(name?: string): Promise<any>;
    unlock(name?: string): Promise<void>;
    protected decreaseRenew(): void;
    protected increaseRenew(): void;
    private notTooLong(lock);
    private preventTooLong(lock);
}