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From other coroutine contexts

Klogging can include information from other coroutine context elements.

As an example, if your application is using Project Reactor, you can store information in a Reactor Context and wrap that in a coroutine ReactorContext.

Configure Klogging to use all the values from the Reactor context in log events (EventItems is a convenient type alias for Map<String, Any?>):

import io.klogging.config.Context
import kotlinx.coroutines.reactor.ReactorContext

val reactorExtractor: (ReactorContext) -> EventItems = { ctx ->
// TBC

Context.addContextItemExtractor(ReactorContext, reactorExtractor)

Any log events emitted within the scope of the Reactor context will include items returned by the reactorExtractor() function from that context.