Hello how do I subscribe to an `Observable` and `Single` at

Question

Hello how do I subscribe to an `Observable` and `Single` at the same time I have this ```Observable zip repo1 getStream repoSingle getStream toObservable repo1 repo2 gt repo1 ``` But it s not calling the thing is that I d like to execute both and subscribe to both in the same `subscribe` it works if I create two separate subscribe though Also I need to use the result of the `repo1 getStream ` to make some calls from the result like if is returning an user I d like to do user gt user getFoo Thanks

gildor · Answer

But do you understand that if you combine Observable and single this observablew finish when single success

Joan Colmenero · Answer

Yes I guess this is the problem why is not working

gildor · Answer

so it s expected

Joan Colmenero · Answer

I read about `doOnDispose ` also but don t know how to make it work

gildor · Answer

why do you need doOnDispose

gildor · Answer

what is you expected semantics

Joan Colmenero · Answer

Because when one finishes it calls the doOnDispose as far as I read on the documentation

gildor · Answer

yes

gildor · Answer

but not when it finishes

gildor · Answer

but when it disposed

Joan Colmenero · Answer

well the thing is I d like to avoid this gt this observablew finish when single success

Joan Colmenero · Answer

And wait until both are done

gildor · Answer

to subscribe on finish use doFinally

gildor · Answer

gt And wait until both are done But this code works like this

Joan Colmenero · Answer

If it s possible because if I create two subscribe it works but looks ugly to me

gildor · Answer

so after your single is finish it s fine to stop observing repo1

gildor · Answer

zip waits when both streams emit at least 1 value

gildor · Answer

but it will be completed if one of them complete

gildor · Answer

so it probabably what you want but if you need only 1 value I would recommend instead Single zip

Joan Colmenero · Answer

The thing is normally I was using observable but then I realized that I need that Single to make it work

gildor · Answer

It would be a bit more clear semantically and it checks that at least 1 value is emmitted

Joan Colmenero · Answer

Because more values can be emited by the observable single is fire and forget

Joan Colmenero · Answer

But I need to call it to update some UI

gildor · Answer

anyway I would recommend to write some sample and demonstrate what doesn t work for you

Joan Colmenero · Answer

The other needs to be there

gildor · Answer

because it s not clear what semantics you excpect

Joan Colmenero · Answer

Ok the thing is this Observable repo1 doesn t need to stop but this Single repo2 is only to make sure some UI is updated so I thought about making a Zip and then just use the result of the repo1 Observable and forget about repo2 Single

Joan Colmenero · Answer

What I had before is only this Observable and I was using the result user and updating UI with that user now I need to call another repository Single but it s doing the changes internally so it s like I don t need to act with it

gildor · Answer

Use combineLatest instead of zip it will not stop observable when single success it will emit both values every time when observable emits

Joan Colmenero · Answer

I ll try thanks

Joan Colmenero · Answer

But I have to put it with specific order

gildor · Answer

Specific order

gildor · Answer

Ahhh I got it it will just change order of params in lambda same as with zip

Joan Colmenero · Answer

So the syntax is Observable combineLatest repo1 getStream repo2 getInfo

gildor · Answer

There are many different overloads check javadoc

gildor · Answer

You also should provide combining lambda as latest argument same as for zip

Joan Colmenero · Answer

I think I got it let me test it and I ll come back slightly smiling face

Joan Colmenero · Answer

Thanks