i have a subscription which i want to outlast the ...

# rx

[william]

i have a subscription which i want to outlast the fragment which it is created in - basically i only want it to die if the application dies. Is the best thing to do to have a CompositeDisposable for my entire application containing similar subscriptions or can i ignore the return value of .subscribe?

[Guillermo Alcantara]

imo, if you really can't think of a scenario where the subscription should terminate it's fine to ignore the return value of .subscribe but I'm always skeptical of the times where I have done that. I feel like I'm probably not considering something.

[alexsullivan114]

Definitely don't have a big ol composite disposable for the whole application because there's no point - once your application is killed everything will be terminated anyways.

[william]

i currently do just ignore them if i want to keep them around forever. there is no risk of them getting garbage collected or something? @alexsullivan114 @Guillermo Alcantara

[yougin]

If that’s something which is must to complete, then I’d consider using WorkManager. Unless it could be a differed operation. Otherwise, I’d probably go with a Service.

[ursus]

Its not fine to ignore them, if you subscribe to it in a fragment, because youre leaking this

[ursus]

have a component that is singleton and let it subscribe to the cold observable, pipe the results into a behavior relay, and expose it to the public

[ursus]

wether you dispose the disposable its up to you, if its singleton per app then technically you dont need to

[ursus]

but your components should in general have create and destroy callbacks, and there you should dispose your stuff, it just so happens you only have 2 layers so your top one doesnt need it

[ursus]

but your scopes could look like this: app > logged in > screen

[ursus]

lmk if not clear

[william]

they're likely not in fragments - ususally a view model. they aren't infinitely running things just like a network request that i want to succeed even if the hosting viewmodel is destroyed