import { Type } from '@angular/core';
import { ObservableBus } from './utils';
import { IQuery, IQueryBus, IQueryResult } from './interfaces';
import { CqrsLoader } from './cqrs-loader';
import { Observable } from 'rxjs';
import { LogSettings } from './tokens';
import { Logger } from './services/logger';
export declare class QueryBus extends ObservableBus<IQuery> implements IQueryBus {
    private readonly loader;
    private readonly logger;
    readonly logging: LogSettings;
    constructor(loader: CqrsLoader, logger: Logger, logging: LogSettings);
    execute<T extends IQuery, TResult extends IQueryResult>(query: T): Promise<TResult>;
    ofType<TInput extends IQuery, TOutput extends IQuery>(...types: (Type<IQuery> | string)[]): Observable<IQuery>;
}