Perl: Using IPC::Shareable for pooling Net::Server connections - perl

Question

I am trying to have a pool of shared connections that can be accessed by Net::Server instances. Unfortunately IPC::Shareable does not allow me to store the connections as they are code references. This is a stripped down version of the code:
use IPC::Shareable (':lock');
use parent 'Net::Server::Fork';
use MyConnectClass;
sub login {
return MyConnectClass->new();
};
my %connection;
tie %connection, 'IPC::Shareable', 'CONN', {
'create' => 1,
'exclusive' => 0,
'mode' => 0666,
'destroy' => 'yes',
}
or croak 'Can not tie connection variable';
sub add_connection {
my $id = shift(#_);
my $con = shift(#_);
$connection{$id} = $con;
};
sub get_connection {
my $id = # .. find unused connection
return $connection{$id};
}
sub process_request {
my $self = shift(#_);
eval {
my $connection = get_connection();
my $line = <STDIN>;
# .. use $connection to fetch data for user
};
};
for (my $i=0; $i<10; $i++) {
add_connection($i, &login);
};
main->run(
'host' => '*',
'port' => 7000,
'ipv' => '*',
'max_server' => 3,
};
Unfortunately the program dies after the first login: 'Can't store CODE items at ../../lib/Storable.pm'. This happens even when hiding $connection in an anonymous array. I am looking for an alternative to utilize the pool.
I appreciate your support

Answer 1

I am unable to propose an alternative module, but make a suggestion which may or not be of use. While you cannot store CODE, you can store strings which can be evaluated to run. would it be possible to pass a reference to the string q!&login! which you can dereference call after being assigned to $connection. ?
#!/usr/bin/perl
use warnings;
use strict;
use Storable;
my $codestring = q'sub { q^japh^ };' ;
#my $codestring = q'sub { return MyConnectClass->new(); }';
#
# for (0..9){ add_connection($i, $codestring) }
open my $file, '>', '.\filestore.dat' or die $!;
store \ $codestring, $file;
close $file;
open $file, '<', '.\filestore.dat' or die " 2 $!";
my $stringref = retrieve $file; # my $con = get_connection()
close $file;
print &{ eval $$stringref } ; # &{eval $$con} ;
exit 0; # my $line = <STDIN>; ...