I recently migrated from `PublishSubject.create&lt...

# coroutines

[Adrian Blanco]

I recently migrated from PublishSubject.create<T>() to MutableSharedFlow<T>(replay = 0, extraBufferCapacity = 1) , but what I can't wrap my head around is what is the use case for MutableSharedFlow<T>() ? (both parameters set to zero by default). It doesn't really seem to do anything.

[gildor]

MutableStateFlow is like BehaviourSubject, so it replay = 1 and onBufferOverflow = DROP_OLDEST

[gildor]

+ it always has default value (which is not true for BehaviourSubject)

[Adrian Blanco]

Ah sorry, meant default constructor for MutableSharedFlow 😅

[gildor]

It doesn’t really seem to do anything

Isn’t it emit if it already have subscribers? I didn’t try, just asking
Also default constructor uses Suspend overflow policty, so emitter will suspend in this case

[Adrian Blanco]

I tried it very shortly and it seemed like it didn't emit to existing subscribers until I added the extra buffer capacity. But I was using tryEmit to post values instead of the suspending emit

[gildor]

. But I was using tryEmit to post values instead of the suspending emit

Probably this why you have this problem, tryEmit will just drop value

[gildor]

There is no way to avoid suspension without buffer

[Adrian Blanco]

Ah that makes a lot of sense, thanks :)