sub execute {
    my $self = shift;

    my $req = BigHairyDatabaseInteraction->new(...);
    {
        local $SIG{INT} = sub {$req->{_signal} = 2;
                               $req->handleInterrupt; };
        local $SIG{TERM} = sub {$req->{_signal} = 15;
                                $req->handleInterrupt; };
        $req->executeRequest();
    }
    # If a TERM/INT signal has been delivered during the request
    # then pass it on to the program itself:
    if($req->{_signal}) {
        kill $req->{_signal}, $$;
    }
    ... rest of $sth->execute()