How to track exit from the PageFragment Lifecycle

Question

Hi,
I have a requirement of keeping track of exit from a pageFragment.
My structure contains: a TaskFlow which contains a train . This train node contains the page Fragments. Now when i navigate from one PageFrag to another ie. when i exit the currently selected node having a page Fragment, i need to fire a logic.
I tried using creating a bean which implements RegionController interface which has refreshRegion(RegionContext ) method.I got hold of RegionBinding interface which has only one of the following values: Entry, Execute_Model, Prepare_Model, Refresh_Unknown, Render_Model and Type_executable_region.
Also in this case i am not exiting the TaskFlow during the navigation.
My doubt is how do i or can i use RegionController to keep track of exit from the currently rendered PageFragment's  Lifecycle.
Also , can i use PagePhaseListener to keep track of the PageFragment lifecycle stage. (My understanding is PagePhaseListener is to be used for Jspx not Jsff). Plz do correct me if i am wrong.
Thanks,
Prasenjit
Edited by: user586616 on Aug 31, 2009 3:54 AM
Edited by: user586616 on Aug 31, 2009 3:57 AM

Answer 1

Hi Frank,
I have created a ControllerClass which implements RegionController. I have registered the same as controller class in my pageFragments PageDef.
So, on navigation from one train node to another. due to post back call to leaving node and freshcall to the arriving node in the train flow. i am able to get the leaving as well approaching node.
My doubt is can i get similar or better control over the nodes traversed using trainModel or anyother adfinternal controller class? Kindly suggest any better way of getting handle to the navigating train nodes.
Sample Code which i have implemented:
public class RegionControllerBean implements RegionController {
public boolean refreshRegion(RegionContext regionContext) {
System.out.println("**********************************");
System.out.println("inside refreshRegion method call");
String selectedView = ControllerContext.getInstance().getCurrentViewPort().getViewId(); ------> this gives me the handle to the viewId of the curently selected pageFragment
System.out.println(ControllerContext.getInstance().getCurrentViewPort().getViewId().toString());
String pageName = selectedView.split("/")[2];
System.out.println("Current PageName:"+pageName);
System.out.println("name: "+regionContext.getRegionBinding().getName());
int refreshFlag = regionContext.getRefreshFlag();
if(refreshFlag == RegionBinding.PREPARE_MODEL){
System.out.println("Inside prepare Model phase"); ------> on entering of that node i need to call some logic before prepare_model phase
if(refreshFlag == RegionBinding.EXECUTE_MODEL){
System.out.println("Inside execute model phase");
if(refreshFlag == RegionBinding.RENDER_MODEL){
System.out.println("Inside render model phase");
// propagate refresh to inner binding container
regionContext.getRegionBinding().refresh(refreshFlag);
return false;
public boolean validateRegion(RegionContext regionContext) {
// propagate the validate to inner binding container
System.out.println("inside validate region method");
regionContext.getRegionBinding().validate();
return false;
thanks,
Prasenjit