Hi everyone I am using koin wuth koin-annotations. Now I am Adding a logger and want to have a facto...

# koin

[Roger Kreienbühl]

Hi everyone
I am using koin wuth koin-annotations. Now I am Adding a logger and want to have a factory, that I can pass a tag, that creates a new logger with that tag. This I achieve with the following code:

@Factory
fun provideLogger(@InjectedParam tag: String?): Logger {
    return if (tag != null) logger.withTag(tag) else logger
}

Now I am wondering, how I can pass the tag when creating for example a singleton:

@Single
class SomeService(logger: Logger) { ... }

Is there any solution to this?

[François]

CurrentIy, Koin annotation can’t support parameter injection directly, you need to use the dsl way to inject some value

[François]

Annotation can only do half the job 😞

[François]

My point is to create a singleton dedicated to inject the value of the tag

[François]

something like:

object Logger : KoinComponent {
   fun log(tag: String? = null) : Logger {
     return get<Logger>(parameters = { parametersOf(tag) })
   }
}

[Roger Kreienbühl]

Ok, thanks for your answer. I tried it and did it like this:

@Single
class SomeService(
    logger: Logger = getKoin().get<Logger> { parametersOf("SomeService") }
) { ... }

This works fine.