Programming Jakarta Struts, 2nd Edition [Electronic resources] نسخه متنی

A.1 ActionServlet and RequestProcessor

A new class called
RequestProcessor was
added to the framework in Struts 1.1. This class takes over much of
the work that the ActionServlet class performed in
previous versions. With 1.1, you can still configure the class name
of the ActionServlet that you want to use for an
application in the web.xml file, but the
RequestProcessor now carries out much of the real
request-processing work.

By default, applications use the
org.apache.struts.action.RequestProcessor class to
handle all incoming requests. You are not required to do anything if
the default behavior suits your requirements. You can, however,
choose to override the default implementation with one of your own.
You can switch implementations by configuring the
controller element in the Struts configuration
file. See Chapter 4 for more details on
configuring the controller element.