How to pause Observable?

Question

I am working on my first Angular 2 product. I created this Observable.timer and then subscribed to it. It polls the server for data.

How do I pause and unpause this?

  ngOnInit(): void {
    this.poll = Observable.timer(500,500).subscribe((t: any) => {
      this.request.getRackList(+this.global.zoneId).subscribe(
        incoming => this.import(incoming),
        err => { this.global.err(err) }
      );
    })
    this.canOpenClose = (this.global.mode === 2);
  }

The alternative is described here https://github.com/ReactiveX/rxjs/issues/1542 — martin, Feb 08 '17 at 08:55

score 8 · Accepted Answer · answered Feb 07 '17 at 21:46

8

There are multiple approaches to pause an Observable. You could:

Unsubscribe / resubscribe when needed
.filter() out emissions when paused
create a connectable Observable so you can pause / start emissions to all subscribers

answered Feb 07 '17 at 21:46

Mark van Straten

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I really liked this talk https://youtu.be/3LKMwkuK0ZE great place for knowledge is http://reactivex.io or http://rxmarbles.com – Mark van Straten Feb 07 '17 at 23:16

score 0 · Answer 2 · edited May 23 '17 at 11:46

0

You can have a look here : RxJS - pause, upon resume give last paused value

Basically, you use the switchMap operator to stop the timer emissions/restart them and a pauser subject to emit a boolean indicating whether you want to pause or restart. If you don't need the latest value, you can replace publishReplay by publish

edited May 23 '17 at 11:46

Community

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answered Feb 08 '17 at 03:31

user3743222

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How to pause Observable?

2 Answers2