@Override
    public void xread_activated (Pipe pipe_)
    {
        if (!anonymous_pipes.contains(pipe_)) 
            fq.activated (pipe_);
        else {
            boolean identity_ok = identify_peer (pipe_);
            if (identity_ok) {
                anonymous_pipes.remove(pipe_);
                fq.attach (pipe_);
            }
        }
    }