BA#007 - What is the difference between DAF and DAS Servlet Pipelines in ATG?

Ans. There are two types of servlet pipelines in ATG for handling requests, DAF Servlet pipeline and DAS Servlet pipeline.

DAF Servlet Pipeline handles JSP requests. The pipeline is invoked by PageFilter present in web.xml, which catches the incoming .jsp request and starts the DAF pipeline.

DAS Servlet Pipeline handles JHTML requets. JHTML pages are usually ATG's dyn/admin pages, which are compilable by ATG. The .jhtml request is captured by DynamoProxyServlet which invokes this pipelines.

It is highly recommended to read this article to fully understand the concepts of Servlet Pipelines for ATG InterviewART#113 - Servlet Pipelines.

Asked By: Wipro, Sapient, HCL

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