Logout & Caching in JSF w/ADF

Question

Hi,
I have a PhaseListener class referenced in my faces-congfig.xml to prevent page caching so the user won't get errors if they click 'Back' in the browser after logging out. Well, that is the idea anyway. Here's my code:
package org.aero.kas.evc.userinterface;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;
public class NoCachePhaseListener implements PhaseListener {
public NoCachePhaseListener() {
public void afterPhase(PhaseEvent phaseEvent) {
public void beforePhase(PhaseEvent phaseEvent)
//from it-eye.nl JSF and Cache-Control article
FacesContext fctx = phaseEvent.getFacesContext();
HttpServletResponse response = (HttpServletResponse)fctx.getExternalContext().getResponse();
response.addHeader("Pragma", "no-cache");
response.addHeader("Cache-Control", "no-cache");
response.addHeader("Cache-Control", "no-store");
response.addHeader("Cache-Control", "must-revalidate");
response.addHeader("Expires", "Mon, 1 Jan 2006 05:00:00 GMT"); //past
public PhaseId getPhaseId() {
return PhaseId.RENDER_RESPONSE;
When I run my page and subsequently click 'Logout' it takes me away from my app to our internal intranet home page, as it should. However, if I click 'Back', rather than being prompted to login (running on embedded OC4J in JDev 10.1.3.2 with jazn.xml populated) I get runtime errors that indicate that a view object is being executed:
javax.faces.el.EvaluationException: oracle.jbo.DMLException: Error while getting estimated row count for view object MyDelegations, statement SELECT count(1) FROM (select distinct * from delegation where admin_id = :AdminIdVar) ESTCOUNT.     at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:190)     at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:143)
What could I be missing?
Thanks,
Ginni

Answer 1

Interestingly, I modified my Logout action to use an actionListener:
public void logoutActionListener(ActionEvent actionEvent) {
ExternalContext ectx = FacesContext.getCurrentInstance().getExternalContext();
HttpServletResponse response = (HttpServletResponse)ectx.getResponse();
HttpSession session = (HttpSession)ectx.getSession(false);
session.invalidate();
with the action set to 'logout' (my global nav rule). Now the logout.jspx page comes up fine. I can still click 'Back' on the browser and get to the original page (with errors 'Invalid Column Type com.microsoft.jdbc.base.BasePreparedStatement')... is there any way to just not let this happen?