Hi. Apologies for going slightly off topic (!), and the long title, but
with all this talk about pre-compiling JSPs, thought I'd jump in with a
question that relates to jasper no-longer recognising when a file has
changed due to the new "_jsp" which it seems to add to the end of files it
compiles.
This proves VERY frustrating when using Ant in development, as you have to
pre-compile *all* your jsp's everytime you make a change, and then restart
the server.
Surely there is a way round this. Has anyone else see it?
Many thanks,
David
Jason Lea <[EMAIL PROTECTED]> on 03/25/2003 02:23:03 AM
Please respond to "Struts Users Mailing List"
<[EMAIL PROTECTED]>
To: Struts Users Mailing List <[EMAIL PROTECTED]>
cc:
Subject: Re: Filter to redirect to welcome action when pre-compiling
JSPs
gaffer wrote:
> Hi Jason,
>
> At this very moment, I am trying to solve a similar issue. Would you
> mind posting the relevant snippets from web.xml and struts-config? Such
> as paths to actions, url-pattern, etc.
>
> Thanks
> Al
Ok, here goes...
web.xml:
<web-app>
...
<!-- Filter: redirect to Struts forwardName-->
<filter>
<filter-name>WelcomeFilter</filter-name>
<filter-class>nz.net.kumachan.project.WelcomeFilter</filter-class>
<init-param>
<param-name>forwardName</param-name>
<param-value>homepage</param-value>
</init-param>
</filter>
...
<filter-mapping>
<filter-name>WelcomeFilter</filter-name>
<url-pattern>/</url-pattern>
</filter-mapping>
...
<!-- Standard Action Servlet -->
<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>
<load-on-startup>3</load-on-startup>
</servlet>
<!-- Standard Action Servlet Mapping -->
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
...
</web-app>
Note:
I don't have a <welcome-file-list> defined in web.xml.
My WelcomeFilter takes a Struts Global Forward, looks up the forward (in
this case it would return "/Homepage.do"). I could have just put
"/Homepage.do" as the forwardName and use
req.getRequestDispatcher(forwardName).forward(req,res) instead of
messing with the Struts code. Hmm, maybe that would be nicer... I might
change it now :)
struts-config.xml:
<struts-config>
...
<global-forwards>
...
<forward
name="homepage"
path="/Homepage.do"/>
...
<global-forwards>
...
<action-mappings>
...
<action
path="/Homepage"
type="org.apache.struts.actions.ForwardAction"
parameter="main.homepage"/>
...
</action-mappings>
...
</struts-config>
Note:
The action "/Homepage" forwards to the parameter "main.homepage" which
maps to a Tiles definition eg in tiles-defs.xml:
<definition name="main.homepage" extends=".mainLayout">
but I could have used something like "WEB-INF/jsp/pages/Homepage.jsp"
for the parameter
Hope this helps...
Jason Lea
>
>
> On Mon, 2003-03-24 at 22:01, Jason Lea wrote:
>
>>Cool. It's good to know someone else has done this. I thought I should
>>post this just so someone else looking at pre-compilation of JSPs would
>>find it useful, but also to see if there are any glaring issues or if it
>>is a Good Thing (TM) :-)
>>
>>Jason
>>
>>David Graham wrote:
>>
>>>This is exactly what I did :-).
>>>
>>>David
>>>
>>>
>>>
>>>
>>>>From: Jason Lea <[EMAIL PROTECTED]>
>>>>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>>>>To: Struts Users Mailing List <[EMAIL PROTECTED]>
>>>>Subject: Filter to redirect to welcome action when pre-compiling JSPs
>>>>Date: Tue, 25 Mar 2003 17:47:14 +1200
>>>>
>>>>I have been playing around with JSP pre-compilation with Tomcat-4.1.24
>>>>(http://jakarta.apache.org/tomcat/tomcat-5.0-doc/jasper-howto.html) so
>>>>I can check my JSP pages for compiler errors before deployment, but
>>>>also to remove the delay that the first hit incurs.
>>>>
>>>>The only problem with this is the <welcome-file> which has to point to
>>>>a physical jsp page and not a servlet. The Struts in Action book
>>>>suggests using a index.jsp page with a <logic:redirect> to a Welcome
>>>>action, which is what I was doing.
>>>>
>>>>I tried creating a servlet that would forward the request onto my
>>>>Welcome action & servlet-mapping with a <url-pattern>/<url-pattern>,
>>>>but this seemed to match any request and cause lots of problems.
>>>>
>>>>So I dropped that idea and instead have used a filter...
>>>>
>>>><filter-mapping>
>>>> <filter-name>WelcomeFilter</filter-name>
>>>> <url-pattern>/</url-pattern>
>>>></filter-mapping>
>>>>
>>>>which works perfectly. It only fires for http://localhost/app/ or
>>>>http://localhost/app and my filter forwards the request onto my
>>>>Welcome action correctly.
>>>>
>>>>I can now get rid of index.jsp and all my other JSPs are pre-compiled.
>>>>I have also hidden all of my JSPs under the WEB-INF so they cannot be
>>>>called directly and have to go through my Struts actions.
>>>>
>>>>
>>>>Jason Lea
>>>>
>>>>
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>>>
>>>
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--
Jason Lea
Email: [EMAIL PROTECTED]
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