Empty Subscription for RxJs

Question

Is there an empty Subscription in RxJs? In RxJava, there is Subscriptions.empty().

An empty Subscription is a Subscription to which unsubscribe does nothing except to change isUnsubscribed to true.

I am looking for it, but I can't find.

developer033 · Accepted Answer · 2020-10-27 12:32:13Z

10

Yes such a thing exists:

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answered Aug 4, 2016 at 17:20

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2 Comments

Thanks! Subscription.EMPTY is what i want. But Disposable.empty is not. It is not Subscription.

The nomenclature changed between versions 4 and 5. Subscription s used to be called Disposable s

user3743222 · Accepted Answer · 2016-08-04 17:08:19Z

Not sure what you want, but I can think about two things :

Rx.Observable.empty(). That returns an observable which immediately emits an onCompleted message.
Rx.Observable.never(). That returns an observable which never emits anything.

So both are empty in the sense that they do not emit any onNext message. However their completion semantics differ. Does that cover your use case?