I've had logging woes recently trying debug code with the help of different
logging frameworks.
I have several projects for which I am responsible, and these projects have
to be tested in a production-like environment (solaris on a remote server)
instead of my development environment (macbook pro on my lap). I could
probably do some fancy vm stuff and a little more dependency injection in
my tests... but sometimes it's really more worth it to put the thing up,
let it break, and read the logs to find out why.
PROBLEM:
log levels.
When I am looking for a mysterious bug, I don't always know where the
problem is so I don't always know which log lines I want to see in the
logs. Maybe the one line that will illuminate the issue is at level 'trace'
and I won't ever see it because it is buried under a billion other log
lines (like, maybe we are siege testing).
SOLUTION:
Tagged logs!
log = new Tagalog({
"acorn":fs.createWriteStream('../myAcorns.log')
})
...
log.debug('did you steal my #acorn? ' + stolen? 'yes' : 'no')
[myAcorns.log]->
did you steal my #acorn? yes
AhHA!
I wrote and published an alpha version of 'tagalog' on npm to test it out.
It's pretty silly right now (no formatted strings, no way to print objects,
etc.), but even at this stage I could use it to tag my logs and isolate the
subjects I am interested in, instead of trusting yesterday me to know that
tomorrow me wants a particular log line at level 'EMERGENCY! OH NOES!'.
To recap:
1. tagged logs
2. debug quickly
3. ????
4. profit!
Please check it out at https://github.com/JoshRagem/tagalog and see how
this idea works for you.
Josh
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