Re: Sharing portlet session attributes with servlets

Derek Richardson <Derek.Richardson <at> appiancorp.com> writes:

> 
> According to PLT.15.3:
> 
> Objects stored in the session using the PORTLET_SCOPE must be available
> to the portlet during requests for the same portlet window that the
> objects where stored from. The object must be stored in the
> APPLICATION_SCOPE with the following fabricated attribute name
> 'javax.portlet.p.<ID>?<ATTRIBUTE_NAME>'. <ID> is a unique identification
> for the portlet window (assigned by the portal/portlet-container) that
> must not contain a '?' character. <ATTRIBUTE_NAME> is the attribute name
> used to set the object in the PORTLET_SCOPE of the portlet session.
> 
> Attributes stored in the PORTLET_SCOPE are not protected from other web
> components of the portlet application. They are just conveniently
> namespaced.
> 
> How can I obtain the <ID> so that I can pass it to a servlet so that the
> servlet knows which portlet's attribute to use in processing?
> 
> Also, within what scope (session, application, forever) is <ID> unique?
> And is <ID> not only unique but also constant - i.e., the same portlet
> window will always have the same <ID>?
> 
> Thanks,
> 
> Derek
> 
> 
Derek,
When using JSR 168, and you want to pass PortletSession to HttpSession, view 
this link: http://www-03.ibm.com/developerworks/blogs/page/Joey_Bernal?
entry=portlet_session_scope_and_sharing

The key is to put PortletSession session = request.getPortletSession();
in you doView method of your Portlet class (not the pagecode).