Creating a logging library and have questions
sybrandy
sybrandy at gmail.com
Tue Feb 2 16:16:37 PST 2010
Hello,
Since I'm continuing to write software in D (no, nothing special...just
pet projects) I felt that I needed to create a library to handle logging
to a file. I have a good start and it seems to work pretty well. I
even have a couple ideas left to implement to make it better, however
I'm having trouble with one. One thing that I did implement, which I
think is pretty cool, is a set up the class to start a thread as a
daemon to run in the background and check for updates to the config
file, much like log4j. This way the user can change the log level at
runtime.
One thing I'm thinking that I want to do is have the writing to the
logfile handled by a separate class. This way I'm hoping to ensure that
there's not a lot of unnecessary synchronizing going on and the amount
of work writing to the logfile won't slow down the rest of the program.
My question is, what is the best approach?
1) I use the current core.thread library and put all my messages in a
buffer that the thread checks periodically, pulls off a new message, and
then writes it to a file. There will be some work to make sure nothing
collides with each other, but I think I can manage it.
2) I wait for the new threading library with message passing to come out
and just rely on the message passing to handle everything. It's a much
cleaner approach based on my experience with Erlang, but there are two
issues and the major one is I have no idea when it'll be ready.
Granted, I don't need this capability now, but I'm interested in getting
it to work.
3) Something else. I really don't have much experience with threading,
so I'm being very careful and really want to understand it. This
library looks to be a good way to learn, however if it's not the best
way to do things, then what would be?
Thanks in advance for any input.
Casey
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