import { ExternalTask } from '@5minds/processcube_engine_sdk';
import { ExternalTaskApiClient } from './Clients';
import { ExternalTaskWorkerHeartbeat } from './ExternalTaskWorker';
import { HandleExternalTaskAction, IExternalTaskWorkerConfig, ILogger, WorkerErrorHandler } from './Types';
export declare class ExternalTaskExecution<TExternalTaskPayload, TResultPayload extends object> {
    private externalTask;
    private processingFunction;
    private externalTaskClient;
    private config;
    private topic;
    private abortExecutionController;
    private customErrorHandler?;
    private onHeartbeatCallback;
    private nextExtendLockTimer;
    private identityAccessor;
    private logger;
    private isDisposed;
    constructor(externalTask: ExternalTask<TExternalTaskPayload>, processingFunction: HandleExternalTaskAction<TExternalTaskPayload, TResultPayload>, externalTaskClient: ExternalTaskApiClient, config: IExternalTaskWorkerConfig, topic: string, onHeartbeatCallback?: ExternalTaskWorkerHeartbeat, customErrorHandler?: WorkerErrorHandler, customLogger?: ILogger);
    get disposed(): boolean;
    execute(): Promise<void>;
    abort(): void;
    private dispose;
    private processResult;
    private handleExternalTaskExecutionError;
    private scheduleExtendLock;
    private extendLock;
    private cancelScheduledExtendLock;
    private evaluateError;
    private sleep;
}