HttpSession in Liferay Vaadin Portlet

Hi All,

Can some one help me how to
set and retrieve variables
from HttpSession in case of Vaadin Liferay Portlet . My Target is i want to set one Pojo Object in httpsession of One Portlet and i want to retrive the same pojo object from other Portlet.

Since i am new to Vaadin-Liferay Portlet can some one share the example .

Note :
All my Portlets are running in same Project Context.

Thanks in Advance,
Suman Alapati,