withActiveLogContext

Returns a Logger bound to the coroutine's active LogContext.

This is the portable way to log inside a withLogContext block: the context is read from the coroutine context and bound to the logger object, so every event it emits carries the context on every platform.

withLogContext(LogContext(mapOf("requestId" to id))) {
    val log = LoggerFactory.get("Api").withActiveLogContext()
    log.info { "Starting" }              // carries requestId on every platform

    withContext(Dispatchers.Default) {
        log.debug { "Working" }          // still carries it - it is bound to the object
    }
}

On JVM/Android the ambient context is also visible to plain, unbound loggers (see withLogContext); binding additionally works everywhere else.