JSF + Liferay: Cannot send parameters from a bean to another

Question

I've tried all methods, nothing works, in the destination @PostConstruct the parameter is null.

I am sending a redirect from BeanA to a page (backed by BeanB) and trying to extract the parameter from BeanB. The requirement is to not add the parameters to the URL.

I tried all methods:

• FacesContext.getCurrentInstance().getExternalContext().getSessionMap().put("userId", userId);
• @SessionScoped bean,
• ec.getFlash().put("userId", userId);

Any suggestions? I am redirecting with:

 FacesContext facesContext = FacesContext.getCurrentInstance();
        facesContext.getExternalContext().redirect(url);

Answer 1

The portlet API knows two session scopes: PORTLET_SCOPE and APPLICATION_SCOPE

The default bridge maps all attributes in the session map to PORTLET_SCOPE, that means those attributes are only visible to the portlet.

If you want to write and read session attributes for all portlets, you have to use:

PortletSession session = ((PortletSession) FacesContext.getCurrentInstance().
    getExternalContext().getSession(true));

// set
session.setAttribute(attributeName, value, PortletSession.APPLICATION_SCOPE);
// get
Object value = session.getAttribute(attributeName, PortletSession.APPLICATION_SCOPE);

In a XHTML you can use #{httpSessionScope.attributeName} as well.