Hi,
Also take a look at PageAttached.
(http://tapestry.apache.org/tapestry5/guide/lifecycle.html)
- Ville
Chris Lewis-5 wrote:
>
>
>
> James Sherwood wrote:
>> Hello,
>>
>>
>>
> Hi.
>> I have security through page Activate.
>>
>>
>>
>> All my pages extend a page that has a method:
>>
>>
>>
>> @OnEvent("activate")
>>
>> Object onSecurityCheck(){
>>
>> Check security if fails return Index.class
>>
>> }
>>
>>
>>
>> This works however any page that has its own onActivate() method, the
>> method
>> still runs (the extended page runs first) but everything still works
>> fine.
>>
>>
>>
>> Is there a way to prevent the pages onActivate() method(as some have db
>> calls in them) from running if the extended page's activate method
>> returns a
>> page.
>>
> Well, no, and that has nothing to do with T5 - just the bland design of
> the java language's semantics (and most other languages I've worked
> with). The service that handles the page requests (I believe) is the one
> that invokes the various life cycle methods on the page instance. T5
> handles page returns from onActivate as an indication to load that page.
> When you subclass a class and override a method implementation, the
> method that gets called on subclass instances is responsible for
> returning a value. Therefore you can't rely on the return of an
> overridden superclass method because overriding method is the one that
> must return a value.
>
> I'd consider looking into Dispatcher based authentication, but assuming
> you want to use the page-based approach, why not just have the
> subclasses return the value returned by executing super.onActivate() ?
>>
>>
>> Thanks,
>>
>> --James
>>
>>
>>
>
> --
> http://thegodcode.net
>
>
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