cache-buster-2.ts

const articleNotifier = new Subject();
@Injectable()
export class ArticleService {
  constructor(private _http: HttpClient) {}

  @Cacheable({
    cacheBusterObserver: articleNotifier
  })
  getArticles() {
    return this._http();
  }
  @CacheBuster({
    cacheBusterNotifier: articleNotifier
  })
  createArticle() {
    return this._http();
  }
}