Its all in the RequestProcessor

http://cvs.apache.org/viewcvs.cgi/jakarta-struts/src/share/org/apache/struts/action/RequestProcessor.java


The main process(request, response) method in RequestProcessor calls
processMapping(request, response, path) which calls findActionConfig(path)
in  ModuleConfig to find the Action mapping that you configured in the
struts-config.xml.

Later on in the process() method it calls the processActionCreate() method
to get hold of the Action instance and then processActionPerform() actually
calls the action's execute() method.

Niall


----- Original Message ----- 
From: "Chang Ming Chye" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, April 07, 2004 2:20 AM
Subject: RequestProcessor handling http requests


> Hi,
>
> How does struts handle incoming request and routes it
> to the correct action?
>
> For example, if I declare my web.xml as:
>
> <servlet>
>   <servlet-name>action</servlet-name>
>   <servlet-class>
>     org.apache.struts.action.ActionServlet
>   </servlet-class>
>   <init-param>
>     <param-name>config</param-name>
>     <param-value>
>       /WEB-INF/struts-config.xml
>     </param-value>
>   </init-param>
> </servlet>
>
> <servlet-mapping>
>   <servlet-name>action</servlet-name>
>   <url-pattern>*.do</url-pattern>
> </servlet-mapping>
>
> and in my struts-config.xml file I have the following
> action declared:
>
> <action path="/searchAction" ... >
>
> When the http request "*/searcAction.do" is received
> by the Action Servlet, how is the actual action
> "/searchAction" as specified retrieved? Which method
> of the RequestProcessor actually removed the extension
> ".do" from the request?
>
> Furthermore, if the URL-pattern of my servlet-mapping
> is specified as "/do/*" instead of "*.do" are the
> request mapped again to the actions specified?
>
> Thanks.
>
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