import { Runner, WorkerUtils } from 'graphile-worker';
import { Pool } from 'pg';
import { EnqueuedJob, PluginsServerConfig } from '../../../types';
import { JobQueueBase } from '../job-queue-base';
export declare class GraphileQueue extends JobQueueBase {
    serverConfig: PluginsServerConfig;
    runner: Runner | null;
    consumerPool: Pool | null;
    producerPool: Pool | null;
    workerUtilsPromise: Promise<WorkerUtils> | null;
    constructor(serverConfig: PluginsServerConfig);
    migrate(): Promise<void>;
    connectProducer(): Promise<void>;
    enqueue(retry: EnqueuedJob): Promise<void>;
    private getWorkerUtils;
    disconnectProducer(): Promise<void>;
    protected syncState(): Promise<void>;
    private onConnectionError;
    createPool(): Promise<Pool>;
}