Hello friends, A new version (6.5.5) of Kodein-DI has been plublished! You can find the changelog: https://github.com/Kodein-Framework/Kodein-DI/blob/6.5/CHANGELOG.md It brings Kotlin 1.3.72 !

I have an old singleton class which was used in about 20 other classes, previously via

MyClass.getInstance()

.. I've now converted this to a Kodein singleton, however I'm wondering if there's still a way I can access it from one particular class without

@Inject

? there's one particular class I don't really want to update because it is intertwined with a lot of other stuff and in the interest of time (and testing capacity) I would like to leave that class mostly untouched. so most of the classes now just get

MyClass

injected to them, but is there some way I can retrieve it from the other class I mentioned which I'd like to avoid making large changes to?

👋 Just started learning Kodein. If I have 2 modules and

module B

needs to use an instance from

module A

is the best practice to import

module A

into

module B

? For example,

subscribersModule

needs the retrofit instance from `networkingModule`:

val networkingModule = Kodein.Module("networking") {
    bind<Retrofit>() with singleton {
        Retrofit.Builder()
            .baseUrl("<https://api.example.com/>")
            .build()
    }
}

val subscribersModule = Kodein.Module("subscribersModule") {

    import(networkingModule)

    bind<SubscribersService>() with singleton {
        instance<Retrofit>().create(SubscribersService::class.java)
    }
}

Hi all, I tried many approaches but they don’t work. I try to write simple code with KodeIn and I get:

Unable to instantiate activity ComponentInfo{uptop.me.testcoroutine/uptop.me.testcoroutine.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference

Activity code:

class MainActivity : AppCompatActivity(), KodeinAware {

    override val kodein by closestKodein(context = this)

    private val viewModel: MainViewModel by kodein.instance<MainViewModelImpl>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        viewModel.doSomething()
    }

}

Dependencies:

fun appModule(context: Context) = Kodein.Module("appModule") {
    bind<MainInteractor>() with provider { MainInteractorImpl() }
    bind<MainViewModel>() with provider { MainViewModelImpl(instance()) }
}

App:

class App: Application(), KodeinAware {
    override val kodein: Kodein by Kodein.lazy {
        import(androidXModule(this@App))
        import(appModule(this@App))
    }
}

Thanks in advance!

Hey everyone, I would like to implement something like “*user scope*” where particular dependencies can exist only that scope and can be destroyed (app start/login -> logout for user scope). I understand kodein has some concept of

Context

and

Scope

, but I couldn’t find some good example how to achieve it. Could anyone point me to any article/tutorial/explanation of how to do it? Thank you 🙂

Hello, I use Android Studio 4.0 Beta 5 with Kotlin 1.3.72 and kodein 6.5.5. I can compile and run my app without issue but Android Studio reports me this error: Not enough information in infer type variable T for this code:

private val toolbarManager: ToolbarManager by instance() // the underlined error is on instance()

I can have no error with this code:

private val toolbarManager by instance<ToolbarManager>()

A while ago, perhaps before I have upgraded Android Studio and/or Kotlin and/or kodein, the first code didn't raise any error in Android Studio. Does anybody have an explanation ?

Was Kodein 7 released? I see it in GitHub for a while now (as well as commits referencing 7.1) but the artifacts are not in mavenCentral or jcenter

Still appears to be a memory leak issues in Kodein v7 - https://github.com/Kodein-Framework/Kodein-DI/issues/301

Hi, In KMP project(Android/iOS), is it safe to assume that I can replace usage of

Instance(erasedSet())

with

instance()

in Kodein-DI 7.0?

Update: I have 1 interface that implements multiple interfaces. The implementation of that interface is a singleton. I try to bind the instance to all the different interfaces that it implements. On 6.5.5 this was working fine, on 7.0.0 I get the error mentioned above. Is this worth reporting or am I doing something wrong?

Im trying to use kodein in a multiplatform project that targets android and ios. For android im using https://kodein.org/Kodein-DI/?7.0/android#_using_a_trigger but im getting an error:

Expression 'di' cannot be invoked as a function. The function 'invoke()' is not found

- Any ideas? Using kodein 7.0.0

Ok so you have to actually define the bindings directly, fair enough. The docs for 7.0 could use some love i think, https://kodein.org/Kodein-DI/?7.0/getting-started doesnt match the info in https://kodein.org/Kodein-DI/?7.0/migration-6to7 - e.g. its still referencing

kodein-generic

and

kodein-erased

How to connect dependence to common target in mpp? Now I use for common:

"org.kodein.di:kodein-di:7.0.0"

for jvm

"org.kodein.di:kodein-di-jvm:7.0.0"

for js

"org.kodein.di:kodein-di-js:7.0.0"

I see only for jvm and for js.

Hi everyone. I am trying to use kodein in kmp ios project, but I faced with exception EXC_BAD_ACCESS. Did anyone know how to fix it? Version 7.1.0-master87

Hi all, is the new kodein (7.1.0-master-88) already compiled with the IR compiler for JS (or at least both option)?

Hi all 👋 trying to use Kodein for a KMP 1.4 native project (I’ve used it before Kotlin 1.4) but when I add the dependency in

commonMain

the iOS dependency doesn't seem to be found...

implementation("org.kodein.di:kodein-di:7.0.0")

tried following this post and I'm doing pretty much the same, noth sure if anyone has run into this same problem... thoughts?

hi - looking into kodein a bit, does it use reflection or perform code generation?

Hello, I'm trying to set up my multiplatform project with Kodein DI, and I'm wondering if there is a recommended way to create a

DI

to provide platform-specific implementations. Basically, I have an

interface

in my common code that I have created a platform specific implementation for in JVM (no other platforms yet, since common/jvm is enough for my current level of multiplatform exploration). I originally decided to inject the platform specific code into the constructor without a framework:

class SomeClass(val commonInterfaceName: CommonInterfaceName)

and then inject the implementation when I start the app from the JVM entry point. I can do the same thing now by injecting a

DI

instead, but I want to be able to create a

DI

module that I know contains all of these bindings. I'm wondering if there is a standard way to ensure that the

DI

being passed in has all of the necessary bindings (which I guess gets into a broader question of compile-time verification). Or if there is a way to I'm not sure if what I'm saying is clear or not. Also, before you ask why I'm not using

expect/actual

, the answer is because I don't know if/when I should. It seemed like interfaces would be more robust and provide for dependency injection (in the way that I was doing it, at least). I'm still trying to work out what multiplatform best practices look like.

are there any sample apps that use that Kodein-DB beta?  I'm trying here to pull in to a (multiplatform) project and having some issues....gradle seems to be able to get dependencies but see following

+--- org.kodein.db:kodein-db:0.2.0-beta FAILED
\--- org.kodein.db:kodein-db-serializer-kotlinx:0.2.0-beta

Re.

kodein-db

, am calling

val db = DB.open("bikeshare_db")

but getting

org.kodein.db.leveldb.LevelDBException: NotFound: bikeshare_db/LOCK: No such file or directory

it seemed from https://docs.kodein.org/kodein-db/0.2.0/core/setup-database.html that the default is to create the database if it does not exist?

@romainbsl hi! May be you have some ideas about my problem?

I'm trying out

kodein-db

in a kotlin multiplatform project. https://docs.kodein.org/kodein-db/0.2.0/core/operations.html includes examples like

db.find<User>().all().models()

I'm not seeing

models()

available here for some reason

Hey guys, I've used kodein on the backend before, but am new to using it on Android/KMP. I have a dependency which needs an

applicationContext

to initialize (SQLDelight android SqlDriver). Scopes seem the right way to do that, but I don't see anything like ApplicationScope available.

Trying to inject into an Android

Worker

as per https://stackoverflow.com/questions/59546159/kodein-injecting-into-workmanager -- however, as soon as I extend from

DIAware

, I get

e: java.lang.IllegalStateException: Backend Internal error: Exception during file facade code generation

at compile time. Any ideas?

kodein-db question....I'm able to do following

val networkList = cityBikesApi.fetchNetworkList().networks
networkList.forEach {
    db.put(it)
}

but following does not work....should it?

db.put(networkList)

And somewhat related, is following recommended way to get back a list

db.find<Network>().all().useModels { it.toList() }

https://github.com/Kodein-Framework/Kodein-DB includes example of use of

models()

but that's not resolving here

Hi 🙂 has anyone experience testing a ktor app using the kodein DI Feature? I've got an application that looks like this:

fun Application.main() {
    di {
        bind<SomeService>() with singleton { SomeService(environment.config) }
    }
...

I use the service somewhere in the app, in the routes, etc. My tests (kotest) look like that:

"A Request should do something" {
    withServer {
        val req = handleRequest {
            uri = "/someroute"
        }

        req.requestHandled shouldBe true
        req.response shouldHaveStatus HttpStatusCode.OK
    }
}

withServer

is a wrapper for

withTestApplication({ main() }, test)withTestApplication({ main() }, block)

My problem is that I currently need to test against a real database as I don't get the DI mock to work. Any hints for me here? Thanks!

Is someone using Kodein-DI with Compose? I’m curious how are you providing and scoping VMs in Composables? @romainbsl is any support planned?

I’m trying out Kodein in a ktor project. I’ve used Koin previously but was curious to checkout Kodein as I’m looking for a single DI framework to use for other non-ktor Kotlin projects and Kodein has a lot of the features I’m used to from Guice. I’m reading through the docs for the DIController and having some difficulty understanding how all the pieces fit together. The link to the example project is a dead github link (https://github.com/Kodein-Framework/Kodein-DI/tree/7.1/demo/demo-ktor) Are there any Kodein 7.x examples with ktor using the DIControllerFeature?