import { ExternalTask } from '@5minds/processcube_engine_sdk';
import { DatabaseAdapter } from './BaseDatabaseAdapter';
export declare class ExternalTaskDatabaseAdapter extends DatabaseAdapter {
    initialize(): Promise<void>;
    findByFlowNodeInstanceId(flowNodeInstanceId: string): Promise<ExternalTask<unknown>>;
    findByExternalTaskId(externalTaskId: string): Promise<ExternalTask<unknown>>;
    fetchAvailableForProcessing<TPayload>(topicNames: string | Array<string>, maxTasks: number, payloadFilter?: RegExp): Promise<Array<ExternalTask<TPayload>>>;
    lockForWorker(workerId: string, externalTaskIds: Array<string>, lockExpirationTime: Date): Promise<void>;
    unlockExternalTasks(externalTaskIds: Array<string>): Promise<void>;
    getExternalTasksWithActiveLock<TPayload>(): Promise<Array<ExternalTask<TPayload>>>;
    setExternalTaskLockExpired(externalTaskId: string): Promise<void>;
    private getJoinsForSelectQuery;
    private convertToRuntimeObject;
    private applyPayloadFilter;
    private tryParse;
}