Accessing information necessitates two separate subscriptions

I am posting this inquiry in order to enhance my understanding. Below is an excerpt from my service:

export class HomeService {
   private generalstatistics = new ReplaySubject<object>();
   constructor(
   private http: HttpClient
     ) {
    this.fetchData();
  }
  public get generalStatistics(): Observable<object> {
    return this.generalstatistics.asObservable();
  }
  fetchData() {
    this.http.get<any>(`${environment.apiUrl}/home/`)
    subscribe(data => {
    this.generalstatistics.next(data);
  });
 }
}

In the above code snippet, I have my initial subscription. Subsequently, in a component requiring this data, the following piece of code can be found:

constructor(private dataSvc: HomeService) {
  this.retrieveData();
}
retrieveData() {
   this.dataSvc.generalStatistics
   .subscribe(data => {
   this.source = data;
 });
}

This section contains my second subscription. Is there a way to avoid having two subscriptions for the sake of learning?

Thank you

Answer №1

Instead of executing a subscription within the service, consider performing it inside the component.

For example:

data() {
    return this.http.get<any>(`${environment.apiUrl}/home/`)
});

Subsequently, subscribe to this data wherever necessary!

Within a component for instance:

this.homeservice.data().subscribe(...)

By doing so, you can streamline your code and reduce redundancy.

I hope this advice proves helpful!

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