Portlet preferences within serveResource method

[infoni]

Hi,

I'm trying to set the portlet preferences through an AJAX call. I've opted to use the serveResource() method of the portlet. When I invoke the portlet function, serveResource(), through the AJAX call, the method does get executed. Within the serveResource() method, I then proceed to update my portlet preference:

String mypreference= request.getParameter("mypreference");

PortletPreferences portletPreference = request.getPreferences();
portletPreference.setValue("mypreference", mypreference);
portletPreference.store();

It doesnt throw an exception, but it doesnt work neither: mypreference is correctly updated in resourceRequest, but not stored permanently. Specifications 286 seems authorize update preferences in serveResource method (PLT.13.1):

For serveResource calls only state changes to non-shared state, like the portlet session scope or portlet preferences, should be performed

, and it works in liferay. 

Do someone has informations about this issue?

Thx

[infoni]

I use Gatein 3.2 bundle with tomcat 6.0

[hoang_to]

Could you clearify 'not stored permanently'? A ResourceServing portlet is typically triggered after RenderRequests, so modifying PortletPreference within a ResourceServing portlet has no effect on returned portlet markup

[infoni]

Hi Minh,

thanks for response i was on holidays last week. I mean 'not stored permanently', portlet preferences are not stored in portal database. It seems

portletPreference.store()

has none effect in a serveResource method, i cant figure why.

I try to keep a full compatibility for my application with Websphere portal, Gatein and Liferay, and i'm stuck on that issue with Gatein :/ I love this portal i absolutly want to find a workaround or at least an explanation.

Any idea / suggestion would be much appreciated