One of my angular component needs to allow subscriptions to a number that
it holds. I am trying to turn this number into an observable so others can
subscribe to it.
my publisher looks like
private countChanged = new BehaviorSubject<any>(null);
public historyTimespanChanged$ = this.countChanged.asObservable();
private publish() {
this.countChanged.next(this.count);
}
expandTimeSpan() {
this.count ++;
this.publish();
}
reset() {
this.count = 0;
this.publish();
}
getHistoricalCount() {
return Observable.of(this.count);
}
my observer looks like
this.historyComponent.getHistoricalCount()
.subscribe(count => {
if (count !== 0 ) {
console.log('new history timespan expanded: ', count);
this.historyCount = count;
this.retrieveHistoricalData();
}
});
but the subscriber never gets called.
Can anyone see what I am doing wrong?
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