Tomcat JSF custom error page

[David Segall <da...@segall.net>]

I have, after hours of trial and error, managed to persuade Tomcat to
use my custom error page in a Java Server Faces application. Now that I 
have solved the problem I would like to know where I could have looked 
to find the answer.

In case someone finds this page via a web search I should provide the
answer here. I had to add the following lines to 
%CATALINA_HOME%\webapps\MyApp\WEB-INF\web.xml

<error-page>
<error-code>404</error-code>
<location>/faces/pagenotfound.jsp</location>
</error-page>

The initial "/" was required in the location despite the fact that the 
NetBeans Visual Web Pack generated <welcome-file> tag did not have a 
leading "/". Would I have solved this problem more quickly if I was not 
using NetBeans as a "rapid application development" tool?
-- 
David

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Re: Tomcat JSF custom error page

[Louis <la...@gmail.com>]

David Segall wrote:
> I have, after hours of trial and error, managed to persuade Tomcat to
> use my custom error page in a Java Server Faces application. Now that 
> I have solved the problem I would like to know where I could have 
> looked to find the answer.
>
> In case someone finds this page via a web search I should provide the
> answer here. I had to add the following lines to 
> %CATALINA_HOME%\webapps\MyApp\WEB-INF\web.xml
>
> <error-page>
> <error-code>404</error-code>
> <location>/faces/pagenotfound.jsp</location>
> </error-page>
>
> The initial "/" was required in the location despite the fact that the 
> NetBeans Visual Web Pack generated <welcome-file> tag did not have a 
> leading "/". Would I have solved this problem more quickly if I was 
> not using NetBeans as a "rapid application development" tool?

The j2ee specification or web.xml dtd or xsd would have told you that 
information. This doesn't really have anything to do with JSF specifically.

 > The initial "/"
Yeah they could have been a little more consistent.

Would you have solved the problem more quickly? Not likely. Netbeans 
isn't a RAD tool. It's an IDE (integrated development environment). RAD 
is more a way of working rather than the tools you're using. At least 
initially you're better off using one IDE consistently rather than 
jumping ships everytime you have a problem. Once you get comfortable 
developing in one, then I would recommend you try two or more other 
IDE's to see how they do things differently. And flat out learn how to 
do what you're doing with a plain text editor. You'll understand what's 
actually going on in the IDE better.

Further Reading:
http://java.sun.com/dtd/web-app_2_3.dtd
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd

This documents well (in english) what each of the elements in the 
web.xml are for.
http://e-docs.bea.com/wls/docs61/webapp/web_xml.html


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