| How to compile jsp files with ANT | How to compile jsp files with ANT 2007-02-21 - By James Abley
I would suggest you take a closer look at my original suggestion. If you
use the Jasper task, then I would think that the compiled versions of
the JSP aren't portable off Tomcat. e.g.
public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent {
Your target container _may_ provide a mechanism for compiling JSPs,
otherwise you _do_ need to request each page as part of your deployment
strategy to make sure that they have been compiled.
Cheers,
James
Rashmi Rubdi wrote:
> Hi James,
>
> I use the Jasper task to mainly reduce the time it takes to load a JSP page.
>
> I only execute the Jasper task just before creating the WAR file for the
production environment.
>
> On the production environtment that gets multiple visitors throughout the day
, every time someone makes the *first* request to a particular JSP page - the
container's compiler compiles it for the first time.
>
> This is fine if the application is small but if the app has too many JSP
pages then, the container would compile each and every JSP page just once thus
> slowing the overall application response time especially if multiple users
are accessing different parts of the web app at the same time. Pre-compiling
the JSPs makes the web application response time much faster because the
container only serves the class file.
>
> If you refer to the JSP 2.0 Final Release Specification (PDF) jsp-2_0-fr-spec
.pdf on page 1-7 , it lists all the benefits of pre-compiling JSPs.
>
> I don't use the Jasper task for the development environment though, because
one wouldn't mind a negligible wait for just one JSP page in the development
environment and
> also because the Jasper task takes a very long time to complete, it is not
suitable for a dev build but only for production build.
>
> -Regards
> Rashmi
>
> ----- Original Message ----
> From: James Abley <james.abley@(protected)>
> To: Ant Users List <user@(protected)>
> Sent: Wednesday, February 21, 2007 3:12:40 AM
> Subject: Re: How to compile jsp files with ANT
>
>
> Why do you want to do this; e.g. is it part of a check to make sure that
> all JSP pages will compile? Typically, you'd get better results by using
> httpunit or a spider of sort sort to access every page and check that it
> doesn't come back with a 500 response. That way, you are using the
> deployment target container mechanism to compile the JSPs.
>
> James
>
> Rashmi Rubdi wrote:
>> Hi Lokesh,
>>
>> I'm assuming you want to pre-compile JSPs. You can use Jasper for that.
>>
>> Take a look at the Jasper ANT task here:
>> http://tomcat.apache.org/tomcat-5.5-doc/jasper-howto.html
>>
>> The pre-compilation process first converts all JSP files to .java files and
then compiles them into class files, it will also modify web.xml
>> to create a servlet mapping of every JSP class file.
>>
>> for example:
>>
>> <servlet>
>> <servlet-name>org.apache.jsp.web._005fterms.copyright_jsp</servlet
-name>
>> <servlet-class>org.apache.jsp.web._005fterms.copyright_jsp</servlet
-class>
>> </servlet>
>>
>> <servlet-mapping>
>> <servlet-name>org.apache.jsp.web._005fterms.copyright_jsp</servlet
-name>
>> <url-pattern>/web/_terms/copyright.jsp</url-pattern>
>> </servlet-mapping>
>>
>> I guess that's what you are looking for.
>>
>> -Rashmi
>>
>> ----- Original Message ----
>> From: Lokesh Jayaraman <lokesh.jayaram@(protected)>
>> To: user@(protected)
>> Sent: Tuesday, February 20, 2007 4:41:55 AM
>> Subject: How to compile jsp files with ANT
>>
>>
>> Dear,
>>
>> How to compile JSP files using ANT and Websphere Application Server 6.0
>> and also use websphere's java compiler and libraries
>> Kindly help me to solve this pbm
>> by
>> Lokesh
>>
>>
>>
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