ip_address: 10.0.1.17
user: me

##</code><code>##

package Server;

use Carp;
use Moose;
use Modern::Perl;
use Config::Simple;

has 'cfg' => (is => 'ro', isa => 'HashRef', required => 1, writer => '_set_cfg' );

sub get {
  validate_pos( @_, {isa => 'Server', optional => 0},{type => SCALAR, optional => 0} );
  my $self = shift;
  my $key = shift;
  my $properties = $self->cfg;
  return $properties->{$key};
}

around BUILDARGS => sub {
  # Load cfg file and set cfg attribute here
}

##</code><code>##

my $server = Server->new('config_file_name');
$server->get('ip_address');

##</code><code>##

sub BUILD {
  my $self = shift;
  my $properties = $self->cfg;
  foreach my $prop (keys %$properties) {
    # check that the property doesn't already exist as a method
    croak "Server config file property '$prop' clashes with existing method. Aborting." 
      if ($self->can($prop));
    # create new method
    $self->add_singleton_method( $prop => sub { $properties->{$prop}; } );
  }
}