Allow first argument to logger to be string or subroutine

Bug #1824181 reported by John Merriam on 2019-04-10
This bug affects 1 person
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Bug Description

This simple change allows the $msg passed to _log_message in to be either a regular string or a delayed exec subroutine. This is in reaction to LP1823338 where a slow debug logging statement was slowing down SIP checkins even though debug logging was not turned on.

With this change you can take this:

$log->debug("Available methods\n\t".join("\n\t", keys %{ $_METHODS[$proto] }), INTERNAL);

and change it to this:

$log->debug(sub{return "Available methods\n\t".join("\n\t", keys %{ $_METHODS[$proto] }) }, INTERNAL);

and then that slow debug logging line will not be executed unless debug logging is turned on.

Branch to follow.

John Merriam (jmerriam) wrote :
tags: added: pullrequest
John Merriam (jmerriam) wrote :

is the followup to this where we actually start making use of it.

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