import { ZeebeGrpcClient } from '../zb/ZeebeGrpcClient';
import { StatefulLogInterceptor } from './StatefulLogInterceptor';
import { IZBJobWorker, Job, JobCompletionInterface, ZBGrpc, ZBWorkerTaskHandler } from './interfaces-1.0';
import { StreamActivatedJobsRequest } from './interfaces-grpc-1.0';
export declare class ZBStreamWorker implements IZBJobWorker {
    private grpcClient;
    private logger;
    private zbClient;
    private streams;
    private pollTimers;
    constructor({ grpcClient, log, zbClient, }: {
        grpcClient: ZBGrpc;
        log: StatefulLogInterceptor;
        zbClient: ZeebeGrpcClient;
    });
    streamJobs<WorkerInputVariables, CustomHeaderShape, WorkerOutputVariables>(req: StreamActivatedJobsRequest & {
        inputVariableDto: {
            new (...args: any[]): Readonly<WorkerInputVariables>;
        };
        customHeadersDto: {
            new (...args: any[]): Readonly<CustomHeaderShape>;
        };
        taskHandler: ZBWorkerTaskHandler<WorkerInputVariables, CustomHeaderShape, WorkerOutputVariables>;
        /**
         * Optional jitter in milliseconds. When provided, the worker will wait
         * a random period up to this value before polling and opening the stream.
         * Useful for staggering multiple stream workers.
         */
        jitter?: number;
        /**
         * Maximum number of jobs to activate per poll cycle (both the initial
         * backfill and the recurring sidecar polls). Defaults to 32.
         */
        pollMaxJobsToActivate?: number;
        /**
         * Interval in milliseconds between sidecar poll cycles. The sidecar poll
         * is a low-frequency safety net that picks up jobs the stream may have
         * missed (e.g. jobs re-queued after a timeout). Each poll is a command on
         * the broker, so keep this value high to minimise load.
         *
         * Defaults to 30000 (30 seconds). Set to 0 or -1 to disable recurring
         * polling (the initial backfill poll still runs).
         */
        pollInterval?: number;
    }): Promise<{
        close: () => void;
    }>;
    close(): Promise<void>;
    log(msg: JSON): void;
    debug(msg: JSON): void;
    error(msg: JSON): void;
    protected makeCompleteHandlers<T>(thisJob: Job, taskType: string): JobCompletionInterface<T> & JobCompletionInterface<T>;
    private failJob;
    private completeJob;
    private errorJob;
}