Hi! I’m trying to figure out best way to deal with Koin in multi module project… Is there any recommended way? So for example:

network  <--\              / <-- home   <--\
             | repository |                 | app
database <--/              \ <-- login  <--/

In such scenario (app depends on home&login where home&login depends on repository where repository depends on network… etc, depends on mean using

implementation

, not

api

), how to manage Koin modules? I was thinking of having network provide it’s own modules and passing it up to repository, repository would consume it, add it’s own and pass it up further.. This will cause the problem where many network and repository koin modules would be provided to the app module (I know I can fix it by allowing overriding the modules) . It’s also not so flexible for testing, I can’t provide testNetwork module in home or login feature as these modules are unaware of the network. Another thing is that I can’t really test database as it’s needs to be aware of Android context (sqldelight..) so to test checkModules configuartion I would need to mock it there. Different idea I had was to create another module like

di

that would be aware of all the modules that expose some Koin modules. In

di

I would connect everything together and expose it for the app module (which would depend on

di

). But this doesn’t really solves the problem with testing 🤔

I essentially need a navGraphSavedStateViewModel. Any ideas?

Hi Is there any possibility to use profiles (such as spring) to enable/disable some beans in module And is there analog of spring @PostConstruct ?

Has anyone experienced flaky tests without output

java.lang.IllegalStateException at KoinContextHandler.kt

From

./gradlew testDebug

? I’ve used koin before in a few projects and this one is internal. It extends

AutoCloseKoinTest

and fails for certain files exactly every other time. Using

./gradlew clean testDebug

fixes it, but I’m not sure what the issue is. Curious if anyone has experienced the same thing

( New to koin here ) I have started koin in my Application in Android, and am now trying to override a network dependency in the unit tests, but am having trouble doing so. I have tried setting that network component as override and using loadKoinModule, but get an error, please use startKoin

When binding two singletons like this:

single { SomeClass.Factory(...) }
single { SomeOtherClass.Factory(...) }

(on Kotlin Multi Platform), I get this error:

java.lang.IllegalStateException: InstanceRegistry already contains index 'Factory'

How can I make Koin use the qualified class name instead of just the inner class’ name? It is probably of this code in the jvm target of Koin:

actual fun className(kClass: KClass<*>): String = kClass.java.simpleName

Why is

simpleName

used and not the full-name?

hi I use proguard but E/[Koin]: Instance creation error : could not create instance for [Factory:'d0.z']: f0.b.c.i.f: No definition found for class:'d0.l0.a'. Check your definitions E/[Koin]: Instance creation error : could not create instance for [Single:'h.a.a.a.a.k.z']: f0.b.c.i.d: Could not create instance for [Single:'g0.f0'] ...... Caused by: f0.b.c.i.f: No definition found for class:'d0.l0.a'. Check your definitions! .... I want to solve it.

Hi There, I am receiving following exception in some devices, can anyone help me to resolve? Fatal Exception: java.lang.RuntimeException Unable to start activity ComponentInfo{com.alivewallpaper.free/com.alivewallpaper.replicantlib.MainActivity}: org.koin.core.error.InstanceCreationException: Could not create instance for [Single:'com.google.firebase.database.FirebaseDatabase'] Precised logs:

Fatal Exception: java.lang.RuntimeException

Unable to start activity ComponentInfo{MainActivity}: org.koin.core.error.InstanceCreationException: Could not create instance for [Single:'com.google.firebase.database.FirebaseDatabase']

android.app.ActivityThread.performLaunchActivity

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Caused by org.koin.core.error.InstanceCreationException

Could not create instance for [Single:'com.google.firebase.database.FirebaseDatabase']

org.koin.core.instance.InstanceFactory.a

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Caused by com.google.firebase.database.DatabaseException

Calls to setPersistenceEnabled() must be made before any other usage of FirebaseDatabase instance

If that inject call is non-idempotent, it likely should be wrapped in a lifecycle effect like this:

@Composable
fun <T> koinInject(): T {
    val context = KoinContext.get() // this won't recompose if KoinContext is changable, if that is so this should become an Ambient
    return remember(context) { context.inject() } // inject only called once per component per context (but doesn't trigger recomposition when context changes)
}

Wanted to post it here to see what the requirements are. Code like this would make it behave similarly to a member variable.

In our app Koin overshadows actual crash log in Crashlytics. Is there a solution to this. We get crash logs like this instead of actual crashes

Caused by k.a.c.f.e: No definition found for '<package>.h' has been found. Check your module definitions.
       at org.koin.core.scope.Scope.findDefinition(Scope.java:52)
       at org.koin.core.scope.Scope.resolveInstance(Scope.java)
       at org.koin.core.scope.Scope.get(Scope.java:123)
       at org.koin.androidx.viewmodel.ViewModelResolutionKt$createViewModelProvider$1.create(ViewModelResolutionKt.java:25)
       at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:37)
       at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:23)
       at org.koin.androidx.viewmodel.ViewModelResolutionKt.getInstance(ViewModelResolutionKt.java:119)
       at org.koin.androidx.viewmodel.ViewModelResolutionKt.getViewModel(ViewModelResolutionKt.java:26)

This even happens in local testing

Any more active communities for Koin? 😂 Besides that, any multi-module clean architecture projects with Koin that I can check out? I've seen some articles but havent had luck with projects

Hi guys, thinking about to have activity scope with view model that doesn’t get destroyed when rotation changed, is it possible?

Hey guys, I am I doing this wrongly or? I have a single activity approach with multi feature modules with their fragments and VM's. Now I have a DI package in my Module A with repository, network and VM koin modules. This is what I am doing at the moment. I just reference those 3 modules from the other package.

open class App : Application() {

    override fun onCreate() {
        super.onCreate()
        startKoin {
            // Android context
            androidContext(this@App)
            // modules
            modules(com.example.core.di.networkModule, (com.example.homeFeed.di.)viewModelModule, (com.example.homeFeed.di.)repositoryModule, com.example.homeFeed.di.networkModule)
        }
    }

}

But I crash with this as the output https://hastebin.com/qizixidumu.sql Also is there a better way to handle koin modules in a multimodule app? Like having an array of modules and then just loading them when needed as the fragments change? Thank you!

Does

checkModules

test viewModel modules? I’m having an issue with resolving a class that has a provider, and after commenting things out I realize none of the viewModel providers seem to be tested

Is anyone here using Koin in their Kotlin Multiplatform project? How are you feeding your swift classes into Koin from your iOS app?

any work around for this https://github.com/InsertKoinIO/koin/issues/830

Hey 👋 Is there any "unload-hooks" functionality one can achieve with Koin? For example: You have some components that need to explicitly clean up and just removing a reference to it is not enough. You could let these components extend an interface that makes it clear that these components need to do clean up (

class A : Disposable

).

Disposable

offers a

dispose

function that every such component needs to implement. Is there a way to let Koin trigger

dispose

of all loaded dependencies once

unloadModule(...)

is called?

Hello, I was checking if I could drop jetifier, and I found out that Koin is still using some support libraries. is there any plan to fully migrate to AndroidX in the near future? Thanks

Hi colleagues, Could you advise please, what's Koin`s official position on injecting on

@WorkerThread

thread? (e.g. in

FirebaseMessagingService

) Is it considered OK or discouraged?

hi, I'm new to

checkModules

. As I understand it only checks if there are gaps inside the module graph. But if I try to check for a leaf of the graph it won't fail, such as forgetting to add a

factory { B() }

in the following case.

class A : KoinComponent {
  val b : B by inject()
}
class B {
}

Is there any way to check for that too without having to write specific tests for specific classes? (which I may forget)

Hey everyone, cross posting this from #ktor: has anyone tried using Koin with Ktor, and creating a scope that lasts for the duration of a request? For example, if I wanted to be able to inject something like a trace id, how would I go about doing that? Thanks!

Anyone here that would help integrate Koin with Navigation Graph jetpack library?

not yet, work in progress 👍

but then also, a bit of breaking (Scope API mostly)

@arnaud.giuliani is it planned to improve the experimental feature to avoid the usage of

get()

? it is recommended to not use in Android, maybe moving from reflection to some another alternative (arrow meta maybe?)

Is there some doc about Koin 3.0.0 and its usage in multiplatform projects?

Koin 2.2.0-alpha-1 is out ... Now you can use KOin with Kotlin 1.4 👍

Sorry to re-ask this but does anyone know if the 3.0.0 branch (for KMP) is going to be updated for 1.4?

[Question] what does

unloadKoinModules

actually do? What is meant by

unload Koin modules from global Koin context

Does it not destroy the instances module contain?