import { Database } from "./database";
export interface TimerOptions {
    jobIsJson: boolean;
}
export declare const DEFAULT_TIMER_OPTIONS: TimerOptions;
export declare class TimedJob<J> {
    expires: number;
    id: string;
    created: number;
    job: J;
    private timer;
    constructor(expires: number, id: string, created: number, job: J, timer: Timer<J>);
    delete(): void;
}
export declare class Timer<J> {
    db: Database;
    private options;
    private waiting;
    private singleTimer;
    currentLatency: number;
    private running;
    private stayAlive;
    constructor(db: Database, options?: Partial<TimerOptions>);
    close(): void;
    private keepAlive;
    get timerCount(): number;
    get idleWorkerCount(): number;
    addAt(expires: number, job: J): TimedJob<J>;
    add(timeout: number, job: J): TimedJob<J>;
    _delete(timer: TimedJob<J>, scanForNext?: boolean): void;
    getNext(): Promise<TimedJob<J>>;
    jobs(): AsyncIterable<TimedJob<J>>;
    peekNext(): TimedJob<J> | undefined;
    pipeTo(sink: (job: TimedJob<J>) => void, continuing?: boolean): void;
    private check;
}