Yeah, one way to do it is to set up a Registry as a K/V store. At the time when you save the logger metadata, also run:
Registry.register(MyCorrelationRegistry, make_ref(), [<whatever-metadata-you-want>])
When you launch the task, run the following:
metadata = :"$callers"
|> Process.get([])
|> Enum.find_value(fn parent ->
case Registry.select(MyCorrelationRegistry, [{{:_, :"$1", :"$2"}, [{:==, :"$1", parent}], [:"$2"]}]) do
[c] -> c
_ -> nil
end
end)
|> List.first
note that if something goes wrong (e.g. tasks not rooted to a process that registered itself) metadata will be nil; also note that this should work for nested Tasks.
