I'm injecting a viewModelScope into my repository. But, since I'm injecting the repository into the ...

# dagger

[Se7eN]

I'm injecting a viewModelScope into my repository. But, since I'm injecting the repository into the view model, it becomes a cyclic dependency. How can I fix this?

@HiltViewModel
class MyViewModel @Inject constructor(
    private val repository: MyRepository
) : ViewModel()

class MyRepository(
    private val api: MyApi,
    private val coroutineScope: CoroutineScope
)

Module:

@InstallIn(ViewModelComponent::class)
@Module
object RepositoryModule {

    @Provides
    fun provideMyRepository(
        api: MyApi,
        viewModel: MyViewModel
    ): MyRepository {
        return MyRepository(api, viewModel.viewModelScope)
    }
}

[Javier]

Not injecting the viewModel/viewModelScope in the repo

[Javier]

just use suspend funs if in the repo/api

[Daniel]

Create a custom scope with dispatchers.main.immediate and a supervisor job, then inject that

[Se7eN]

@Daniel I'll try that

[Se7eN]

@Javier I want to create a StateFlow in my repo

[Javier]

why you need the scope?

[Javier]

myStateFlow.value doesn't need even being async (if so, just suspend fun)

[Javier]

if you want a suspend fun to use a specific dispatcher, just use

suspend myFancySuspendFun() = withContext(<http://Dispatchers.IO|Dispatchers.IO>) { ... }

[Se7eN]

I'm doing this: flow { }.stateIn(scope, ...)

[Javier]

ah, I understand

[Se7eN]

Yeah anyways I'm creating the StateFlow in view model now

[Javier]

you are exposing room flow or something so?

[Javier]

I would do that indeed, just expose a normal flow, and collect it in the viewModel and emit whatever you need as state in the stateFlow in the VM

[Se7eN]

I'm fetching data from the network and exposing Flow<Resource> for loading, success and error states

[solidogen]

I inject a app-wide coroutine scope into any singleton component needing to launch coroutines

[solidogen]

@Provides
@Singleton
@GlobalScope
fun provideGlobalScope(): CoroutineScope = MainScope()

[solidogen]

@Qualifier
@Retention(AnnotationRetention.RUNTIME)
@Target(
    AnnotationTarget.CLASS,
    AnnotationTarget.FIELD,
    AnnotationTarget.FUNCTION,
    AnnotationTarget.VALUE_PARAMETER
)
annotation class GlobalScope

[solidogen]

as long as you do not inject this into anything with a lifecycle or cancel it, it will be fine