Last Page Visited

[israel.bgf]

How to know the last page that the user visited?

Example:

I'm, in the view /view1.xhtml and go to the /view2.xhtml, now in the view 2 i want some method to return the /view1.xhtml, is there any built-in function to achieve this?

[israel.bgf]

And btw, is there any Seam/JSF event that can detect if the user changed the current page? Maybe something with a phase listener to achieve this..

[ben_utzer]

Hi,

you could try registering a listener to org.jboss.seam.afterPhase or org.jboss.seam.beforePhase events I guess.

Cheer,

Ben

[israel.bgf]

But how could i know if the view id is changing with these events? Anyway, id did a component to solve this needing:



`
package br.com.techpeople.nexxcard.utility;

import java.util.LinkedList;

import javax.faces.context.FacesContext;

import org.jboss.seam.Component;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.AutoCreate;
import org.jboss.seam.annotations.Create;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.intercept.BypassInterceptors;

@Name("viewHistory")
@AutoCreate
@BypassInterceptors
@Scope(ScopeType.SESSION)
public class ViewHistory {

        private LinkedList<String> history;
       
        @Create
        public void init(){
                history = new LinkedList<String>();
        }
       
        public void addCurrentViewId(){
               
                String currentViewId = FacesContext.getCurrentInstance().getViewRoot().getViewId();
               
                if(history.size() != 0 && history.getLast().equals(currentViewId)){
                        return;
                }
                if(history.size() == 2){
                        history.removeFirst();
                }
                history.add(currentViewId);
        }
       
       
        public String getLastViewId(){
                if(history.size() == 0){
                        return FacesContext.getCurrentInstance().getViewRoot().getViewId();
                }
                return history.getFirst();
        }
       
       
        public static ViewHistory instance(){
                return (ViewHistory) Component.getInstance("viewHistory", ScopeType.SESSION);
        }
}

`

Just have to put it in action in the pages.xml to the view id matching /*. Example:

<page view-id="/pages/*" login-required="true">
     <action execute="#{viewHistory.addCurentViewId}" on-postback="false"/>
</page>

the problem is... it is doing something strange, it's causing an endless redirect in my browser. Don't know why, maybe I did a mistake. Could someone just put this component, and test it for me?

Thanks in advance,

Israel

(Seam 2.1.1)

[ben_utzer]

Hi Israel,

your code works for me if I correct the spelling error in #{viewHistory.addCurentViewId}.

My suggestion was to use something like:

 @Observer("org.jboss.seam.beforePhase")
 public void before(PhaseEvent event) {
    if (event.getPhaseId().equals(PhaseId.RENDER_RESPONSE)) {
        //do your history thing
    }
 }

[ralf]

Hi,

there is a component, which name is redirect. There is a functionality which is named captureCurrentView and returnToCapturedView.

https://www.redhat.com/docs/manuals/jboss/jboss-eap-4.3/doc/seam/api/org/jboss/seam/core/Redirect.html

You can track method-calls and their behaviour in the pages.xml

I dont have an example, but i am sure, you will find something.

[israel.bgf]

Thanks for the replies, i will give a look in both tips. :)