Why ATG invokes DAF pipeline thru Filter and DAS thru Servlet?

[Nooruddin Shaik]

Hi!
  ATG invokes DAF pipeline thru Filter(PageFilter) for JSP
and DAS pipeline thru Servlet(NucleusProxyServlet) for JHTML.

Is there any specific reason why ATG uses filter to invoke DAF pipeline instead of using servlet?


Thanks
Shaik

[George Oprica]

JSP pages and fragments are handled by the application server -
meaning that JBoss, WebLogic, WebSphere is the one responsible for
compiling and executing the resulting page code. The best way to hook
into this process is by using a Filter. For JHTML pages, thats a
different story since the app server can't parse and compile the
pages. A servlet is used to redirect the request down the DAS pipeline
where the page can parsed and executed by the ATG page compilation
mechanism.

- George

[Nooruddin Shaik]

Thanks George!