On Wed, 4 Jul 2012, Meir Guttman wrote:
Well, I found at least one use for the $logger->log() method: dynamic level
logging.
Hi Meir,
that's an interesting use case, thanks for reporting it. I've changed
the documentation accordingly:
https://github.com/mschilli/log4perl/commit/b60c85acb482095a5d1939c2a25e64653f3c3624
--
-- Mike
Mike Schilli
m...@perlmeister.com
I have though an issue with one passage in the documentation. In the CPAN page
Log::Log4perl (Ver. 1.37)
(http://search.cpan.org/~mschilli/Log-Log4perl-1.37/lib/Log/Log4perl.pm) one
can read the following:
Instead of calling the methods
$logger->trace("..."); # Log a trace message
... (other variants deleted)
you could also call the log() method with the appropriate level using the
constants defined in Log::Log4perl::Level:
use Log::Log4perl::Level;
$logger->log($TRACE, "...");
... (other variants deleted)
But *** nobody does that, really ***. (my enhancement - MG) Neither
does anyone need more logging levels than these predefined ones. If
you think you do, I would suggest you look into steering your logging
behavior via the category mechanism.
Well, I found at least one use for the $logger->log() method: dynamic level
logging.
Take for example a "system()" call. It can return a number of exit codes by
issuing something like «exit(0x2C);» command. I find it very convenient to segregate on
the basis of the return code what logging level to assign to the log message upon
returning:
my %exit_level = (
0 => $INFO,
1 => $WARN,
2 => $WARN,
4 => $ERROR,
0xFF => $FATAL,
);
My %message = (
0 => "Message 1",
1 => "..."
...
);
my $result = system ('perl', 'my_script.pl, @args) >>= 8;
$logger->log($exit_level{$result}, $message{$result});
So, I would recommend a change in the doc showing such an example.
Meir
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