KOtlin DEpendency INjection

KODEIN is a straightforward and yet very useful dependency retrieval container. it is effortless to use and configure.

KODEIN works on all Kotlin Multiplatform targets:

JVM / Android.
all Native platforms (iOS, macOS, Linux, Windows, WebAssembly).
Javascript / WasmJs.

KODEIN allows you to:

Lazily instantiate your dependencies when needed
Stop caring about dependency initialization order
Bind classes or interfaces to their instance or provider
Debug your dependency bindings and recursions

KODEIN provides extensions to be integrable into:

An example is always better than a thousand words:

kotlin
val di = DI {
    bindProvider<Dice> { RandomDice(0, 5) }
    bindSingleton<DataSource> { SqliteDS.open("path/to/file") }
}

class Controller(private di: DI) {
    private val ds: DataSource by di.instance()
}

KODEIN is a good choice because:

It proposes a very simple and readable declarative DSL
It is not subject to type erasure (as Java is)
It integrates nicely with Android
It proposes a very kotlin-esque idiomatic API
It is fast and optimized (makes extensive use of inline)

Installation

Kodein is available on Maven Central.

kotlin
repositories {
    mavenCentral()
}

kotlin
kotlin {
    sourceSets {
        commonMain {
            dependencies {
                implementation("org.kodein.di:kodein-di:{version}")
            }
        }
    }
}