hi, i am trying to abstract out my database initlization to a separate module for others to use. here is what i have come up with ( a simple version ): 
package MyDB;
use strict;
use warnings;

my $DBH;

sub new {
    return bless {}, shift;
}

sub dbh {
    if ( $DBH ) {
        # return $DBH
        print "found existing ",$DBH;
    } else {
        $DBH = 'my handler';
        print "init dbh";
    }
}

1;

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then in other file i can just do : 
use MyDB;
{ MyDB->new->dbh } # init dbh
{ MyDB->new->dbh } # got the cached dbh

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i am running the code under plain CGI. i made the $DBH as class variable in order to cache the same $dbh if i need to use it somewhere else in the same program. dbh caching works but i sort of reaching the solution by trying/guessing but don't know exactly why.

can someone please explain to me?

by the way, is it a good practice for caching dbh this way? will it still work under mod_perl without using Apache::DBI?

In reply to OO question by Anonymous Monk

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