I am reworking the logging of our little web application written in golang. Due to external requirements logging has been isolated in one place so we can potentially switch in a logging server later on. (Not my idea - I promise....) Nevertheless we are now able to log the common things like date/time, line number, user and the message mostly using parts of the standard library and a user/session struct we are passing around.
But - and here comes the question - in lower level methods it is a waste to pass in the session just to get to the user name for the sake of logging. So I would like to find something else to use to find one specific request in the log files. I am sure there are something obvious I haven't thought of.
Ideas so far:
- Java logging frameworks can print out the thread id and that would be good enough in this case also. Just that it is called something else in golang?
- make the user/session struct thing accesible globally somehow. (Still need to pass the session id around unless there are a thread to use as lookup key. Back to idea number 1.)
- give up and pass the user/session struct around anyway.
- don't log errors on the lowest level but only when the user/session struct is available. The line number won't be that good though.
We are using parts of gorilla for web things and apart from that mostly the standard library.
Suggestions and ideas about this?