Koin sample Kotlin application

HelloApplication.kt

// A model class
class HelloModel(val who: String = "Koin")

// Service interface
interface HelloService {
    fun hello(): String
}

// Service implementation with injected helloModel instance
class HelloServiceImpl(val helloModel: HelloModel) : HelloService {

    override fun hello() = "Hello ${helloModel.who}"
}

// HelloApplication
class HelloApplication : KoinComponent {

    // Inject service
    val helloService by inject<HelloService>()

    init {
        println(helloService.hello())
    }
}

// Koin module
val HelloModule = applicationContext {
    provide { HelloModel() }
    provide { HelloServiceImpl(get()) as HelloService }
}

fun main(vararg args: String) {
    startKoin(listOf(HelloModule))
    HelloApplication()
    // will print "Hello Koin"
}