import { Context, ActionObserver } from '../../../shared/domain';
import { Executor, ExpressionListener } from '../../domain';
export declare class ExecutorObserveDecorator implements Executor, ExpressionListener {
    private readonly executor;
    private observers;
    constructor(executor: Executor);
    eval(expression: string, context: Context): any;
    evalAsync(expression: string, context: Context): Promise<any>;
    execute(task: string, context: Context): Promise<any>;
    subscribe(observer: ActionObserver): void;
    unsubscribe(observer: ActionObserver): void;
    private beforeExecutionNotify;
    private afterExecutionNotify;
    private errorExecutionNotify;
}