[mp2] reliable methods to prevent handlers from repeating

[Dorian Taylor]

suppose i wanted the same logic as:

    return Apache::DECLINED unless $r->is_initial_req;

except that sometimes it may be necessary to serve for a subrequest,
just not more than once. the construct i tried is:

    for (my $pr = $r; $pr; $pr = $pr->prev) {
        if ($pr->notes->get(__PACKAGE__ . '::SEEN')) {
            $r->log->debug("We've been seen already.");
            return Apache::DECLINED;
        }       
    }
    $r->notes->set(__PACKAGE__ . '::SEEN', 1);

but i get no love. what's the preferred way of dealing with this?

cheers

.dorian