Question

i’m trying to get the portletPreferences enter in my ConfigActionImpl which is like this :

public void processAction(PortletConfig arg0, ActionRequest arg1,
            ActionResponse arg2) throws Exception {
    String portletResource = ParamUtil.getString(arg1, "portletResource"); 
    final String newlink= ParamUtil.getString(arg1, "newlink");
    final PortletPreferences portletPreferences = 
    PortletPreferencesFactoryUtil.getPortletSetup(arg1, portletResource);
    portletPreferences.setValue("newlink", newlink);
    portletPreferences.store();        
    SessionMessages.add(arg1, arg0.getPortletName() + ".doConfigure");
}

I want to have default preferences display in the first load, and change it if i want.

I was thinking it is like this:

protected String showView(ModelMap model, PortletRequest request) {
    preferences.getValue("newlink", monUrl);
}

this is the only part of my portlet which don’t work, and when i wrote the url directly, the url is well load.

And then, i use monUrl in the code.
I have a null pointer exception

I don’t know very much portletPreferences and found nothing can help me.

I just want to load preferences in my variable and use it after.

Answer 1

I found on my own how to fix it.

In fact i replaced in showView this “PortletRequest request” by this “PortletPreferences preferences”

and this “preferences.getValue(“newlink”, monUrl);” by “monUrl preferences.getValue(“newlink”, monUrl);”

    protected String showView(ModelMap model, PortletPreferences preferences) {


            monUrl = preferences.getValue("newlink", monUrl);   

}

And it works fine.