Thanks for the pointer.
Our idea is to actually override the renderComponent() method to implement our security concerns.
We want to write a custom EnhancementWorker to change the IWriter accordingly after calling a SecurityContext.isUserInRoles( {'ADMIN', 'SUPERVISOR'} ) which will check a ThreadLocal etc. (left out the gory details)
But since the renderComponent() method is already enhanced by tacos InjectAjaxComponentRenderWorker, it appears that we would need to extend this class and add our code in the subclass?
And also override in hivemind using the approach here - http://hivemind.apache.org/override.html
Any thoughts?
Thanks! Karthik
On 11/14/06, andyhot <[EMAIL PROTECTED]> wrote:
tacos also registers a FormComponentEventWorker.
It's responsible for adding 2 more parameters to all form components...
"eventListener" and "formatter"
https://svn.sourceforge.net/svnroot/tacos/tacos-4.0/trunk/tacos-core/src/java/net/sf/tacos/ajax/impl/FormComponentEventWorker.java
Here's their registration
https://svn.sourceforge.net/svnroot/tacos/tacos-4.0/trunk/tacos-core/src/descriptor/META-INF/tacos.enhance.xml
So, my question is why don't you create your own enhancment worker and
contribute it to
tapestry.enhance.EnhancementWorkers configuration point?
Karthik N wrote:
> Hello,
>
> Tacos 4.0.1 - We are contemplating adding an EnhancementWorker to the
> renderComponent method of AbstractComponent.
>
> The idea is to be able to perform certain "Security" operations in a
> (hopefully) elegant fashion.
>
> For eg. we have cases where a Tab should hide/show itself, a TextField
> should hide/show itself.
>
> Here are the thoughts:
>
> 1) Introduce a formal parameter for each component something like
> renderIfUserInRoles ognl:{'ADMIN', 'SUPERVISOR'}
>
> 2) A custom EnhancementWorker to change the IWriter accordingly after
> calling a SecurityContext.isUserInRoles( {'ADMIN', 'SUPERVISOR'} )
> which will check a ThreadLocal etc. (left out the gory details)
>
> 3) If the user is not in roles pass on a NullWriter to the component,
> so that it will not render its content.
>
> So here are the questions:
>
> 1) After some digging we find that InjectAjaxComponentRenderWorker
> already enhances AbstractComponent.renderComponent(). Methods of
> this Worker are protected, so we plan to further override this
> implementation and use the approach described in
> http://hivemind.apache.org/override.html to override the service-point
> id="ComponentRenderInterceptor"
>
> 2) Is this a good idea?! We would love to hear some feedback.
>
> Thanks, Karthik
> ------------------------------------------------------------------------
>
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--
Andreas Andreou - [EMAIL PROTECTED] - http://andyhot.di.uoa.gr
Tapestry / Tacos developer
Open Source / J2EE Consulting
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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