当ngrx行动/效果在Angular5中完成时,如何通知我?

在我的组件中

this.uploadService.onUpload({
  some: data
})

在我的 uploadService ,我有

  onUpload($event: SubmissionFileUpload) {
    this.userDetails$ = this.homeService.getUserDetails();
    this.userDetails$.subscribe(
      res => {
        this.userDetails = res;
      });
    this.store.dispatch(new UploadActions.UploadPresignAction(this.userDetails.jwt, $event));
  }

当调度的操作完成时,如何通知我的组件?