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nxpatterns/close-that-stream-if-no-need.ts

Forked from LironHazan/close-that-stream-if-no-need.ts
Created January 26, 2022 07:49
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  1. @LironHazan LironHazan created this gist Oct 10, 2020.
    20 changes: 20 additions & 0 deletions close-that-stream-if-no-need.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,20 @@
    private unsubscribeDataFetch: Subject<void> = new Subject<void>();

    // polling data till we get what we need and stop
    fetchData() {
    this.dataService
    .pipe(takeUntil(this.unsubscribeDataFetch))
    .subscribe((data) => actOnData(data));
    }

    actOnData(data) {
    if (this.someCondition(data)) {
    this.stopFetchingData();
    }
    }

    stopFetchingData() {
    this.unsubscribeDataFetch.next();
    this.unsubscribeDataFetch.complete();
    }