Settings for portlet

[Roberto Campione]

Hi All,

I'm relatively new with portal and portlets so I'll explain this as best I can.

I have a portlet, say a View portlet, that changes it's view based on a user setting. There could be numerous View portlets, each with their own setting - i.e. one would show a list of 10, the other a list of 20 etc.

The user sets the number of list items.

Question: How do I store this value to be unique to a individual portlet? So if I set a value on View portlet A, I don't want it to be set of View portlet B.

I've tried a number of options:

- PortletPreferences
- PortletSession
- PortletContext

but none of them suit my needs.

Anybody got any ideas?

[srinivas bodapati]

If you want the user to enter his settings and want the portlet to modify its view based on these seetings, then the best option would be to use the configure/personalize/edit mode of the portlet, which you set while creating the portlet or can add from the portlet.xml file.

The other option would be to have a portlet preference set and make copies of your portlet as many as you want and set the value of this preference for each portlet.
Thus each portlet has its own setting and displays its own view.

[Bigwood Liu]

Using PortletPreference!

Implement doEdit, using PortletPreference, remember to call "store" method on your portletPreference.

 
public void doEdit(RenderRequest request, RenderResponse response)
throws PortletException, IOException{
 
    response.setContentType("text/html");
 
    // Create the return URL for the cancel link of the edit page
    PortletURL cancelUrl = response.createRenderURL();
    cancelUrl.setPortletMode(PortletMode.VIEW);
    // Preserve the Cancel URL in the request to make it accessible by the edit JSP
    request.setAttribute("cancelUrl",cancelUrl.toString());
 
// For the "Save" button the return URI must include the "Save" action
    PortletURL saveUrl = response.createActionURL();
    saveUrl.setPortletMode(PortletMode.VIEW);
    saveUrl.setParameter("save","save");
// Preserve the Save URL in the request to make it accessible by the edit JSP
    request.setAttribute("saveUrl",saveUrl.toString());
 
String displayName = request.getPreferences().getValue("userName", "User");
request.setAttribute("username", displayName);
 
    String jspName = getPortletConfig().getInitParameter("jspEdit");
    PortletRequestDispatcher rd = getPortletContext().getRequestDispatcher("/jsp/Edit.jsp");
    rd.include(request,response);
 
  }
 
  public void processAction(ActionRequest request, ActionResponse response)
   throws PortletException, IOException{
 
PortletContext context = getPortletContext();
 
try{
  String save = request.getParameter("save");
  if (save != null){
PortletPreferences prefs = request.getPreferences();
prefs.setValue("userName",request.getParameter("username"));
prefs.store();
  }
}
catch ( IOException ioe ){
   context.log("An IO error occurred when trying to save the name.");    
}
catch ( PortletException pe ) {
   context.log("A portlet exception was thrown when trying to save the name.");    
}    
 
  }
 
   

[ December 17, 2008: Message edited by: damu liu ]