HttpSession and PortletSession

[cpage]

Hi,

work this JBP 2.0

main question : how can I exchange informations between the portal and a portlet ?

=>
I try to do an Hello User Portlet: an user connect to the portal and the portlet say Hello + UserName

to do so, i have this code in my class and it works well :

public class HelloUser extends GenericPortlet {

 public void doView(RenderRequest req, RenderResponse res) throws PortletException, IOException {
 res.setContentType("text/html");
 try {
 PortletSession session = req.getPortletSession();
 PrintWriter writer = res.getWriter();

 Map ua = (Map) req.getAttribute( RenderRequest.USER_INFO );
 if( ua != null ) {
 writer.write( "Bienvenue à l'utilisateur"+req.getRemoteUser() + " !!<br>" );

 }else{
 writer.write("Aucun Utilisateur connecté");
 }
 writer.close();

 }
 catch (IOException e)
 {
 e.printStackTrace();
 }
 }

}

Second,

I try to get an Attribute in my hello user portlet. This attribute is set in the login.jsp, this way :

Login.jsp:

...
<%
HttpSession Myses = request.getSession();
MySes.setAttribute("toto","youhou !!");
/%>
...

I verified, the attributes "toto" is setting to "Youhou !!"


but, i just cant' get the attribut "toto" in my portlet:

my code:
helloUser.java

PortletSession session = req.getPortletSession();
 String mytoto = (String)session.getAttribute("toto",PortletSession.APPLICATION_SCOPE );

it returns "null".


can you help me, please ?

thanks
Lionel

[bsmithjj]

Try changing your login.jsp in the following ways:

1.) Add the Portlets tag library:

<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet" %>

2.) Use <portlet:defineObjects/> tag

3.) Change your session code to use the PortletSession instead of the HttpSession

Ultimately, your page should look something like this:

...
<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet" %>
...
<portlet:defineObjects/>
...
...
<% portletRequest.getSession.setAttribute("toto","youhou!!"); %>
....

BTW - in JSP, the HttpSession is an implicit object so you can access if simply using session instead of request.getSession().

Hope this helps!

[bsmithjj]

Ooops - code should read:

renderRequest.getSession(...)


NOT


portletRequest.getSession(...)

[bsmithjj]

OOPs one more time - should be

getPortletSession()

not getSession()

[julien1]

it is not possible because the sessions are not the same.

one thing you can do is put a jsp in your webapp containing your portlet and request dispatch to it with a cross context call similar to :

req.setAttribute("blah", "blah");
RequestDispatcher rd = getServletContext().getContext("/myapp").getRequestDispatcher("/my.jsp");
rd.include(req, resp);

and in the jsp

String s = (String)req.getAttribute("blah");
HttpSession ses = req.getSession();
ses.setAttribute("blah", "blah");

[cpage]

it is not possible because the sessions are not the same.

=> impossible to a portlet to get informations put in the httpsession of the portal ? so, what is the mecanism of that code in my portlet req.getAttribute(RenderRequest.USER_INFO ) ?

one thing you can do is put a jsp in your webapp containing your portlet and request dispatch to it with a cross context call similar to :

req.setAttribute("blah", "blah");
RequestDispatcher rd = getServletContext().getContext("/myapp").getRequestDispatcher("/my.jsp");
rd.include(req, resp);

and in the jsp

String s = (String)req.getAttribute("blah");
HttpSession ses = req.getSession();
ses.setAttribute("blah", "blah");

don't understand what you mean.

i just want to share a context (ie: user role store in an other database than portal DB).
this role (may be just a string), is known by the portal at the connection of the user and have to be get by all the portlets in the page.

the portlets, with this role, ask informations to the role database to display their content.


how can i give informations from the portal to the portlets simply ?

thanks a lot ;)

Lionel