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How to free a session variable in Liferay?

In Liferay, I'm using session variables for InterPortlet Communication. 

PortletSession psession = request.getPortletSession();
String userId = (String) psession.getAttribute("userId", PortletSession.APPLICATION_SCOPE);

After use of this variable, I want to destroy it.

How to destroy, scrap the session variables in liferay?

Solution

  • Use removeAttribute method of PortletSession. It will remove attribute from session.

    In your case psession.removeAttribute("userId");

    This is applicable to request and session attributes also.