Set attribute from the filter, retrieve it from the portlets

Hi,

I'd like to set an attribute in the request, when there is an Action
request, from the filter (PortalDriverFilter in the current portal), and I
need this attribute to be read by the portlet to which the Action will be
forwarded (via the container.doAction() method).

I can't seem to do that, is there any clean way for the filter to pass some
info to the portlets?

Thanks,


Pablo