JavaBeans handled properly in session scope only

Question

When implementing own ActionListeners and trying to retrieve data from
the modified JavaBean, i get a nullpointer exception if the javabean is defined not in session-scope. In my example below, the bean "UserManager" can be acessed, if it is defined as session bean. Since this is not necessary, i would prefer this bean to be in request scope.
public class UmaActionListener implements ActionListener {
     public void processAction(ActionEvent arg0)
          throws AbortProcessingException {
          String command = arg0.getActionCommand();
FacesContext context = FacesContext.getCurrentInstance();
if (command.equals("change")) {
UserDataBean bean =
( UserDataBean)Util.getValueBinding("UserManager").getValue(          context);
System.out.println("CHANGE="+bean.getEmail());

Answer 1

The ActionListener code you quote should work fine if "UserManager" actually exists as a request attribute when the event handler is called. But you will have had to put the UserManager there already -- nothing in JavaServer Faces will do that automatically.
Craig McClanahan