How to call next observer whenever first is done?

Question

In my Ionic 2 project I am downloading data from server every 1 minute in a provider class, and whenever the new data comes I need to refresh a chart in my page class, how can I use observables to achieve that? This is how the code looks like in simplified version:

let startTime = new Date(Math.ceil(new Date().getTime() / 60000) * 60000);
  this.Source = Rx.Observable.timer(startTime, 60000).timeInterval().pluck('interval');

  this.Subscription = this.Source
    .subscribe(data => {

          this.http.post(this.ConnectionString)
            .map(res => res.json())
            .subscribe(data => {
             //code
            });
    });

Possible duplicate of [RxJs Observables nested subscriptions?](https://stackoverflow.com/questions/42888604/rxjs-observables-nested-subscriptions) — cartant, Aug 09 '17 at 07:41

score 0 · Answer 1 · answered Aug 09 '17 at 07:41

0

You can try like this using Observable.interval

//Time in milleseconds 
    Observable.interval(15000).flatMap(x => this.http.post(this.ConnectionString))
      .map(res => res.json())
      .subscribe(data => {
        //code
      });

answered Aug 09 '17 at 07:41

Sreemat

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I am asking how to inform another observable whenever this one got done – Aug 09 '17 at 07:45
call the other observable inside subscribe or use flatMap – Sreemat Aug 09 '17 at 07:48
but how to call the other observable inside of subscribe? this is the point of my question – Aug 09 '17 at 07:53

How to call next observer whenever first is done?

1 Answers1