How to fire a web service call every 2 minutes

Question

I need to implement a service that will go fetch Stock details every 2 minutes. Stock details are more prone to change therefore, I have decided to fetch it every 2 minutes. I have implemented fetching the Stock details for just one instance, but how do I change my code so that it fires a request every 2 minutes during the first 12 hours of the day.

In brief :

1. I need to fetch Stock details every 2 minutes.

2. I only need to fire a request from 10AM to 3PM.

   this.myService.getDetailsStock(1).subscribe(
    (response) =>
    {
      this.allStockDetails= response.details;
   
    },
    (error) => 
    {
      alert(JSON.stringify(error));
    }
   );
   

Answer 1

You can use RxJS interval operator for this purpose: Link https://rxjs.dev/api/index/function/interval

  import { interval } from 'rxjs';
    
  const apiIntervalSubscription = interval(2 * 60 * 1000)
     .pipe(mergeMap(() => this.myService.getDetailsStock(1)))
     .subscribe(data => console.log(data))

To stop firing the API after a specific time, we can create another interval where we can check the time every minute and when we reach a particular time, we can unsubscribe the apiIntervalSubscription after that time, like this:

apiIntervalSubscription.unsubscribe();