[JAVA]: portlet

[mercury841]

Ciao,
ho creato una portlet con una preferenza dichiarata all'interno del file portlet.xml e l'ho deployato senza problemi all'interno di JBoss Portlet Container. Il file xml per questa portlet è il seguente:

<portlet>
		<description>PreferencesPortlet</description>
		<portlet-name>PreferencesPortlet</portlet-name>
		<display-name>PreferencesPortlet</display-name>
		<portlet-class>it.portlet.PreferencesPortlet</portlet-class>
		<expiration-cache>0</expiration-cache>
		<supports>
			<mime-type>text/html</mime-type>
			<portlet-mode>VIEW</portlet-mode>
			<portlet-mode>EDIT</portlet-mode>
		</supports>
		<portlet-preferences>
			<preference>
				<name>userName</name>
				<value>Mark</value>
				<read-only>false</read-only>
			</preference>
			<preferences-validator>it.validator.UserNameValidator</preferences-validator>
		</portlet-preferences>
		<portlet-info>
			<title>Portlet Preferences</title>
			<short-title>PreferencesPortlet</short-title>
		</portlet-info>
	</portlet>

Il mio problema si presenta quando cerco di modificare il valore della preferenza a runtime. In poche parole provo a modificare il valore della preferenza attraverso l'utilizzo del metodo "store" però quando cerco di recuperare la prefernza ottengo sempre il vecchio valore.
Per quale motivo non riesco a impostare il valore della preferenza a runtime?
Di seguito ci sono gli altri sorgenti:

public class PreferencesPortlet extends GenericPortlet {


	
	public void doView(RenderRequest request,  RenderResponse response)
			  throws PortletException, IOException {
		
		
		System.out.println("*************************************************** doView");
		response.setContentType("text/html");
		
		String userName =(String)request.getPreferences().getValue("userName",null);
		if (userName != null)
			response.getWriter().println("Hello " + userName);
		else
			response.getWriter().println("Vai nell'edit mode per modificare l'username");
		
		
		
		
	}

	
	public void processAction( ActionRequest actionRequest,  ActionResponse actionResponse) 
			  throws PortletException, IOException {
		
		System.out.println("*************************************************** processAction");
		String userName = actionRequest.getParameter ("userName");
		
		System.out.println("*************************************************** username="+userName);
		
		PortletPreferences pref = actionRequest.getPreferences();
		pref.setValue("userName",userName);
		
		try{
			pref.store();
			System.out.println("*************************************************** store");
		}catch (Exception e) {
			e.printStackTrace();
		}
		
		actionResponse.setPortletMode(PortletMode.VIEW);
		
	}

	@Override
	protected void doEdit(RenderRequest request, RenderResponse response)
			throws PortletException, IOException {
		
		System.out.println("*************************************************** doEdit");
		response.setContentType("text/html");        
        PortletRequestDispatcher dispatcher = getPortletContext().getRequestDispatcher("/WEB-INF/jsp/edit_userName.jsp");
        dispatcher.include(request, response);
	
		
	}

	
}

edit_userName.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/portlet" prefix="portlet" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>


<portlet:defineObjects/>
<h3>Edit User Name</h3>


<form method="post" action="<portlet:actionURL/>">
Username: <input type="text" name="userName" >

<input type="submit"> <input type="reset">
</form>



</body>
</html>

ciao e grazie in anticipo

[mercury841]

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