/// <reference types="node" />
import { Pool } from "pg";
import { Task, RunnerOptions as WorkerRunnerOptions, Runner as WorkerRunner, Logger } from "graphile-worker";
import { Schedule } from "./upsertSchedule";
export interface ScheduleConfig extends Schedule {
    task?: Task;
}
export interface RunnerOptions extends Omit<WorkerRunnerOptions, "schema"> {
    checkInterval?: number;
    leadTime?: number;
    maxAge?: number;
    schedules?: (string | ScheduleConfig)[];
    /**
     * Which PostgreSQL schema should Graphile Worker use for graphile-worker? Defaults to 'graphile_worker'.
     */
    workerSchema?: string;
    /**
     * Which PostgreSQL schema should Graphile Worker use for graphile-scheduler? Defaults to 'graphile_scheduler'.
     */
    schedulerSchema?: string;
}
export declare class Runner {
    options: RunnerOptions;
    workerOptions: WorkerRunnerOptions;
    pgPool: Pool;
    logger: Logger;
    schedules?: (string | ScheduleConfig)[];
    scheduleNames?: string[];
    checkInterval: number;
    leadTime: number;
    maxAge: number;
    interval: NodeJS.Timeout | null;
    workerRunner: WorkerRunner | null;
    constructor(options?: RunnerOptions);
    get shouldRunWorker(): boolean;
    runMigrations(): Promise<void>;
    private check;
    runOnce(): Promise<void>;
    run(): Promise<void>;
    stop(): Promise<void>;
}
export declare function run(options?: RunnerOptions): Promise<Runner>;
export declare function runOnce(options?: RunnerOptions): Promise<Runner>;