Mojolicious

package Mojolicious::Plugin::Database;
use Mojo::Base 'Mojolicious::Plugin';
use DBIx::Simple;

sub register {
  my ($self, $app) = @_;

  $app->attr(dbh => sub {
    my $self = shift;
    my $c = $self->config;

    my $dbh = DBIx::Simple->new(
      "dbi:mysql:database=$c->{db_name};host=$c->{db_host};port=$c->{db_port}",
      $c->{db_user},
      $c->{db_pass},
      {
        RaiseError => 1,
        mysql_enable_utf8 => 1,
        mysql_auto_reconnect => 1,
        Callbacks => {
          connected => sub {
            shift->do('SET NAMES UTF8');
            return;
          }
        }
      }
    ) or die DBIx::Simple->error;

    return $dbh;
  });
}

1;

__END__

# And then in your Mojolicious app:
$self->plugin('Database');