log4perl-devel

[log4perl-devel] log4perl Data::Dumper and renaming $VAR1

[Josh803316 <jos...@gm...>]

I often use Data::Dumper like this:

print Data::Dumepr->Dump([$name],['name']);

# Which will dump with the variable $name = { ....  } instead of $VAR1 = {
... }

I use log4perl and Data::Dumper like this (from the log4perl faq)

$logger->trace( {filter => \&Data::Dumper::Dumper, value => $name}, undef,
$TRACE, undef, undef);


So my question is, how can I log the value so it looks like $name instead of
$VAR1 in the saved log?

Re: [log4perl-devel] log4perl Data::Dumper and renaming $VAR1

[Mike S. <m...@pe...>]

On Fri, 9 Apr 2010, Josh803316 wrote:

> $logger->trace( {filter => \&Data::Dumper::Dumper, value => $name},
> undef, $TRACE, undef, undef); So my question is, how can I log the
> value so it looks like $name instead of $VAR1 in the saved log?

You can pass a reference to a subroutine to Log4perl's logging methods:

      $logger->trace( sub { Data::Dumper->Dump([$name], ['name']) } );

would do the trick while retaining the time-saving late evaluation.

-- Mike

Mike Schilli
m...@pe...

Re: [log4perl-devel] log4perl Data::Dumper and renaming $VAR1

[Josh803316 <jos...@gm...>]

Thanks, that worked like a charm!  Just for my own edification....what is
the real difference between the filter method and the sub method or are they
basically the same?

On Fri, Apr 9, 2010 at 1:20 AM, Mike Schilli <m...@pe...> wrote:

> On Fri, 9 Apr 2010, Josh803316 wrote:
>
>  $logger->trace( {filter => \&Data::Dumper::Dumper, value => $name},
>> undef, $TRACE, undef, undef); So my question is, how can I log the
>> value so it looks like $name instead of $VAR1 in the saved log?
>>
>
> You can pass a reference to a subroutine to Log4perl's logging methods:
>
>     $logger->trace( sub { Data::Dumper->Dump([$name], ['name']) } );
>
> would do the trick while retaining the time-saving late evaluation.
>
> -- Mike
>
> Mike Schilli
> m...@pe...
>

Re: [log4perl-devel] log4perl Data::Dumper and renaming $VAR1

[Mike S. <m...@pe...>]

On Fri, 9 Apr 2010, Josh803316 wrote:

> wn edification....what is the real difference between the filter
> method and the sub method or are they basically the same?

They're the same, just different notations.

-- Mike

Mike Schilli
m...@pe...