First, I know there has been written a lot about this issue, but I still have some issues with it. (Basically: I just don't understand :) )

I think I can explain my question the best with the factual example. What I want is setting a log-level in the main program, and let the printing be done by a module.

I've written my first Object-Oriented module, named: PrintToScreen.pm

#!/usr/bin/perl 

package PrintToScreen;

use strict;

my $version = "0.1";

###############################
# Verbosity
# 
# 0 = Error
# 1 = Normal
# 2 = Verbose
# 3 = Debug
#
###############################


sub new
{
    my $class = shift;
    my $self = {
        _usersetloglevel => shift,
    };

    
    my $usersetloglevel = $self->{_usersetloglevel};
    if ($usersetloglevel >= 3) {
        print "$class $version started with loglevel $usersetloglevel\
+n";
    }
    bless $self, $class;
    return $self;
}

sub Print {
    my ( $self, $msglevel, $message ) = @_;
    if ($msglevel <= $self->{_usersetloglevel}) {
        print "$message";
    }
}

1;

[download]

And some perl-program to call that module and print, depending of course, on the log-level.

setverbosity.pl 
#!/usr/bin/perl

use strict;
use warnings;

use PrintToScreen;
use ConnectMySQL;

# just declaration
my $loglevel = 3 ;

my $pts_obj = new PrintToScreen( $loglevel );


$pts_obj->Print( 1, "Message with level 1! :-)\n");
$pts_obj->Print( 2, "Message with level 2! :-)\n");
$pts_obj->Print( 3, "Message with level 3! :-)\n");

[download]

So far it works, but here's my issue:

I also use a module, named ConnectMySQL.pm, and I would like to pass the value of the log-level to that ConnectMySQL-module. That ConnectMySQL-module also contains 'use PrintToScreen'. So the log-level should be the same as the main program that's calling it.

Of course, the main idea behind al this that I can set the verbosity (/loglevel) while programming on 3, and when everything is finished, set it to 1, so it behaves normal. (including the used modules recursively)

I am afraid that my explanation stinks, but I still think you'll get my point.

For example the ConnectMySQL.pm looks like this: (just imagine the mysql-connect-code)

#!/usr/bin/perl

package ConnectMySQL

use strict;

use PrintToScreen;

my $pts_obj;

$pts_obj->Print( 3, "About to connect to mysql-database... ");
#connect blablabla
$pts_obj->Print( 3, "Done!\n");

[download]

In reply to Passing a variable recursively by timtowtdi

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