RE: handling stale sessions [auf Viren geprueft] Interesting unexplained Solution

[Aidan Connolly <Ai...@xcom.de>]

The problem is now fixed by returning null from my listener method 
immediately on detecting the session object (Visit ) is null.

The only problem now is my lack of understanding of why it is now  working 
.

I am using my engine as I put a println in the no
arg constructor as Jon suggested. Thanks Jon.

I also implement the PageRenderListener interface but when I let the 
session timeout on the page and then refresh the page the
pageBeginRender method is not called.

My code is so simple that I should have explained the problem better on my 
first mail, excuse me.

On the html template I have a simple Select type component 
                                        <select jwcid="docTypes@Select">
                                                <span jwcid=
"listDocTypes@Foreach" source="ognl:docTypes" value="ognl:docItem" index=
"ognl:docTypeIndex">
                                                        <option jwcid=
"selectedDocType@Option" selected="ognl:docType" label="ognl:docItem.name"
/>
                                                </span>
                                                <option jwcid="$remove$">
Invoice</option>
                                                <option jwcid="$remove$">
Timesheets</option>
                                        </select>
On my Page class...
   /**
     * 
     * @return collection of DocTypeDaos
     */
    public Collection getDocTypes() throws Exception{
        log.info("getDocTypes called "); 
        Visit visit = (Visit)getVisit();
        if (visit == null ) {
            log.info("returning null");
            /* this returns user to log in page but why? */
            return null;
        }
        if (docTypes == null) { 
            docTypes = getRemote().getDocTypesForClient(getClientId());
        }
        return docTypes;
    }

when the method getDocTypes() is called on my Java class I used to get a 
null pointer exception getting my logged in client whose session has 
ended.
My problem was to forward the user to the login page in this scenario.

I have installed the eclipse plugin debugger  for JBoss, JBoss -IDE when I 
return from the method I get to the the OgnlRuntime.invokeMethod via the 
sun.reflect and java.reflect packages.
I have no more debug messages  from my packages but my page miracillously 
gets forwarded to my log in page.

amazing,

Aidan   (in Dublin)




"Jonathan O'Connor" <Jo...@xcom.de> 
18/08/2004 17:59
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Subject
RE: handling stale sessions [auf Viren geprueft]






Jon, 
I work for Aidan, so I can answer for him.

Sadly, we are already extending from BasEngine. I guess I will have to get 

out the debugger or add more trace lines to see what is going on.
I'll report back what I find.
Ciao,
Jonathan O'Connor
XCOM Dublin



"Jon Newton" <jo...@SCANSOFTWARE.COM> 
18/08/2004 15:31
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"Tapestry users" <ta...@jakarta.apache.org>


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RE: handling stale sessions [auf Viren geprueft]






Are you sure your engine is being used? You can put a println in the no
arg constructor to verify this.. What happens if you extend BaseEngine
instead of AbstractEngine? That's what I do and my
handleStaleSessionException method works fine. 

Jon 

> -----Original Message-----
> From: Aidan Connolly [mailto:Aidan.Connolly@xcom.de] 
> Sent: Tuesday, August 17, 2004 9:31 AM
> To: tapestry-user@jakarta.apache.org
> Subject: handling stale sessions [auf Viren geprueft]
> 
> Is there any way to forward to another page if the request 
> cycle is null?
> 
> I have over ridden  the protected void 
> handleStaleSessionException from AbstractEngine in my defined 
> engine class but it is not beng called when the page times 
> out. If I refresh an 'expired' page, my visit object is null 
> so I need to forward the user to the log in page, however when I call
> getPage().getRequestCycle() the retrieved cycle is null.
> 
> Many thanks, Aidan.
> 

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