how can i retrieve MDC from a CoroutineContext in ...

# coroutines

[Nikky]

how can i retrieve MDC from a CoroutineContext in a exception handler ?
 the code looks like so currently

private val exceptionHandler = CoroutineExceptionHandler { context, e -> GlobalScope.launch(MDCContext() + context) {

can i somehow do context.getCopyOfContextMap()  ?

[louiscad]

It's unclear what MDC is, but docs about CoroutineContext online explain how to put custom stuff in it and how to get it back.

[gildor]

MDC is Mapped Diagnostic Context, integration with sl4j logging

[gildor]

how can i retrieve MDC from a CoroutineContext in a exception handler

Maybe I misunderstood your case, but why not just

CoroutineExceptionHandler { context, e ->
val mdcMap = 
context[MDCContext]?.contextMap
}

[Nikky]

i arrived at this.. and i hope it ends up working.. MDCContext(context[MDCContext.Key]?.contextMap)

[gildor]

So your goal is copy it? Why not just use directly?

[Nikky]

the goal is to only extract the MDCContext out of the context variable so that the logged error will have the mdc context from where the exception comes.. hopefully

[muliyul]

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-slf4j/kotlinx.coroutines.slf4j/-m-d-c-context/