kotlinlang #koin

Hello, I am wondering can you define a koin module in a 3rd party library, and then just import that into your koin application? (eg. we have a library that we want to maintain its own wiring with koin as we use koin in our main application)

arnaud.giuliani

11/22/2021, 5:58 PM

The question is, what do you prefer? • add magically Activity/Fragment inside the

inject

• have a dedicated API for that:

injectActivity

or something else

holgerbrandl

11/22/2021, 9:06 PM

Just FYI, to provide some thankful feedback 🙂: Thanks to the great docs regarding context isolation, I managed to implement a global dependency context using thread-local. By doing, so the kalasim-user can run multiple simulations at ease in parallel with isolated dependency contexts without even thinking about dependencies. And whenever a simulation is started it makes sure to set the correct koin context for the current thread. See https://github.com/holgerbrandl/kalasim/blob/master/src/main/kotlin/org/kalasim/misc/DependencyContext.kt and as example https://www.kalasim.org/examples/atm_queue/#parallel-whatif

Lilly

11/24/2021, 7:22 PM

Can someone tell me why by

inject

will always try to use

inject

from `org.koin.java.KoinJavaComponent.inject`:

val parser: LegacyParser by inject() // Error: No value passed for parameter 'clazz'

I'm using it in a test class of an android project. I have implemented io.insert-koin:koin-core io.insert-koin:koin-android

arnaud.giuliani

11/26/2021, 4:35 PM

do you have some stacktrace errors?

Marko Kunic

11/29/2021, 10:41 AM

gonna reshare in case I missed something, but I am unable to find anything that would do this, meaning I have to register all DI "services" even if they only have

get()

Lilly

12/05/2021, 2:09 AM

How can I mock

androidContext

with `KoTest`/ using `checkKoinModules`:

internal class DependencyGraphTest : KoinTest, WordSpec() {
    init {
        "Koin" should {
            "inject my components" {
                checkKoinModules(moduleGroupA + moduleGroupB + module {
                    // mock android context ??
                })
            }
        }
    }
}

Lilly

12/05/2021, 2:16 AM

In 3.1.3

checkKoinModules

was introduced and on github it refers to the checkModules page but there is still the "deprecated" approach explained

[ADDED]
[test]
- Introduce new
checkKoinModules
and DSL to help verify modules - https://insert-koin.io/docs/reference/koin-test/checkmodules

[DEPRECATED]
[test]
- deprecate old
checkModules
function, in favor of new API
checkKoinModules

Emirhan Emmez

12/08/2021, 8:52 AM

Is Koin supporting Ktor 1.6.6? Because when i upgrade from 1.6.5 to 1.6.6. This error occurs: Exception in thread "main" java.lang.NoSuchMethodError: 'double kotlin.time.Duration.toDouble-impl(long, java.util.concurrent.TimeUnit)' This error also occurs when i upgrade kotlin version from 1.5.x to 1.6.0 I opened an issue about this. https://github.com/InsertKoinIO/koin/issues/1243

Aaron Pradhan

12/10/2021, 7:24 PM

Anyone know how to share a ViewModel between a parent fragment and child fragments (specifically in a ViewPager2) using delegated properties with Koin? I am only familiar with

by sharedViewModel()

(which is shared with the parent activity, not parent fragment) and

by viewModel()

(which I believe creates a new ViewModel instance for the child class). I'm using

by viewModels({ requireParentFragment() })

right now, which works fine, but it's not using Koin. I looked at this article, which suggested

by viewModel(owner = { ViewModelOwner.Companion.from(requireParentFragment().viewModelStore) })

, but that doesn't work anymore. Similarly, this article suggested

by sharedViewModel(from = { requireParentFragment() })

, but the

from

keyword doesn't exist anymore.

Ruben Quadros

12/11/2021, 3:35 PM

Hi guys, can I use

fileProperties

in a KMM project? I have separate android and ios modules and I am not able to access it in ios module. Using koin version

3.1.4

xxfast

12/14/2021, 12:30 PM

With koin-compose 3.1.4, i’ve noticed that

getStateViewModel

@Deprecated

. How would one inject a view model in a

@Composable

with a

SavedStateHandle

passed through the params?

Patrick Ramsey

12/14/2021, 6:25 PM

I’ve noticed that koin-test 3.1.4 depends specifically on kotlin-test-* 1.5.31. Is there any timeline for supporting kotlin-test 1.5.32?

Scott Kruse

12/15/2021, 9:13 PM

Whats a good way to inject koin dependencies in top level functions?

Marko Kunic

12/16/2021, 4:50 PM

is there a way to override koin dependencies in tests? (eg. I don't want http client making request to 3rd party in tests)

xxfast

12/21/2021, 10:13 AM

Hi all, trying to use koin on the native side, and i’m running into this

Thread 1: EXC_BAD_ACCESS (code=1, address=0x10)

with very little output from the console as to why. Its pointing to this

App`kfun:org.koin.core.module.Module#<get-mappings>(){}kotlin.collections.HashMap<kotlin.String,org.koin.core.instance.InstanceFactory<*>>:

Has anyone encountered this before?

coroutinedispatcher

12/26/2021, 10:28 AM

Hi 👋 Is there any current issue with koin or maven? I am trying to import it in a ktor project but it always fails to sync:

Could not resolve io.insert-koin:koin-ktor:"2.2.3".

My setup:

repositories {
    mavenCentral()
    maven { url = uri("<https://maven.pkg.jetbrains.space/public/p/ktor/eap>") }
}

Then dependencies:

dependencies {
    ...
    implementation ("io.insert-koin:koin-ktor:$koin_version")
}

And in

gradle.properties

koin_version= "2.2.3"

Also added in the same file, maybe this is the mistake:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("io.insert-koin:koin-gradle-plugin:2.2.3")
    }
}

Ruben Quadros

12/26/2021, 1:55 PM

Hi, what is the equivalent of

hiltViewModel()

in koin? I want to get parameters passed to compose navigation using

SavedStateHandle

in my viewmodel.

Vivek Modi

01/01/2022, 5:25 PM

Hey I am new in Koin. What are d/w koin v2 and v3?

Brian Donovan

01/03/2022, 7:18 PM

how do I do a constructor injection with Koin?

Brian Donovan

01/03/2022, 7:19 PM

Malachi de Ælfweald

01/07/2022, 3:05 PM

I see release notes and a tag for v 3.1.5; but it doesn't appear to have posted to Maven Central. Was that intentional?

Aidan Low

01/18/2022, 6:33 PM

We’re researching unifying portions of our Android and iOS apps by moving core logic into a KMM library, very early stages of research. Is it possible to use Koin to inject classes from that KMM library into the Android/iOS classes, or would I need to export simple constructors from the KMM module and then define the DI graph inside the Android and iOS applications? (or is this even possible on iOS?)

aipok

01/23/2022, 11:56 AM

What is the expected way to override declarations in unit tests for specific definitions? I have class

FaceProcessor

that has param from MLKit and I want to override this

MlKit

dependency in unit tests with a mock implementation. What is the best way to do this?

Matthew Laser

01/27/2022, 10:19 PM

is it possible to easily inject a viewmodel into a Service? In trying to inject this via

by viewModel()

per the docs, I wind up with the following:

java.lang.ClassCastException: com.myapp.MyService cannot be cast to androidx.lifecycle.ViewModelStoreOwner

Doing

by viewModel()

inside of

Activity

and

ComponentActivivty

works fine. I also tried switching from

Service

LifecycleService

with no luck. Any help is appreciated! 🙂

Jacob Hughes

02/01/2022, 11:32 AM

Seeing an inconsistent issue with initialising Koin when running iosX64 tests on a multiplatform project. I see get the following error when I run the entire suite of tests

kotlin.IllegalStateException: KoinApplication has not been started

. When I run the test individual the test passes as expected. For context each of my test classes extends implements this abstract class:

abstract class KoinTest : KoinComponent {

    @BeforeTest
    fun beforeTest() {
        println("Starting Koin")
        startKoin {
            printLogger(Level.ERROR)
            modules(
                module {
                    single { Log(testing = useMocks) }
                },
            )
        }
    }

    @AfterTest
    fun after() {
        stopKoin()
    }
}

From my build.gradle

dependencies {
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10")
        classpath("com.android.tools.build:gradle:7.0.4")
}

val commonTest by getting {
            dependencies {
                implementation(kotlin("test"))
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
                implementation("io.kotest:kotest-assertions-core:5.0.1")
                implementation("io.kotest:kotest-framework-engine:5.0.1")
                implementation("app.cash.turbine:turbine:0.7.0")
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0-native-mt")
                implementation("io.insert-koin:koin-core:3.1.5")
            }
        }

Has anyone come across any similar issues?

bloder

02/07/2022, 2:04 AM

Hey! Once FIR is released, is it planned to bring a compiler extension to create a compile time dependency resolution to Koin? I see as a good approach combine Koin DSL with compile time benefits but I don't know if is considered by community. (Also I have plans to build one, then just to know if will be officially considered)

miqbaldc

02/07/2022, 3:01 AM

Does it possible to lock the Koin modules and dependency in some sort of

:koin-bridge

module as well? Related: https://link.medium.com/YNApqhYurnb To avoid leaking API of such data layer in the application layer. So the modules provider exist in the

:koin-bridge

, the

koin-bridge

will depend on domain, & data (for concrete implementation of domain repository) And our application/presentation layer will depends on

koin-bridge

instead of depends directly

:data

layer

tim

02/08/2022, 2:27 PM

I need to access a singleton from an inline function … any suggestions? eg how do I access a

single { something}

value outside of a KoinComponent?

Peter Hsu

02/12/2022, 9:45 PM

Multiplatform/Native/Koin question: I'm not sure what the "correct" way is to utilize Koin when I need to provide an implementation in iOS in swift. There are some 3rd party libs that are in swift that I would like to inject into the Koin modules, which are all defined in the common shared code.

Title

Peter Hsu

02/12/2022, 9:45 PM

e.g., I have an interface

CommonIF.kt

defined in commonMain/interfaces, and a

CommonImpl.kt

in androidMain. In iOS, this is implemented in swift by implementing the

CommonIF

interface. Now the question is how I can make this available to Koin when calling

startKoin

on in my iosMain code. I have an

ModuleLoader

that starts koin and loads the module. The naive approach that I've been using for testing is to add a constructor parameter to

ModuleLoader(val commonImpl: CommonIF)

and provide that in the module by returning this item:

single<CommonIF> { commonImpl }

This breaks the purpose of DI and makes the interface fairly messy and also requires eager loading of these native implementations. Is there a way to clean this up so that the iOS instance is lazily loaded? Is there a way to define Koin modules in swift so that I could just pass in iOS specific Koin modules to the

ModuleLoader

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