Re: Does struts-chain work with tomcat 4.1 ?

[Patrick Chanezon]

Joe Germuska wrote:

Of course, it would be better to rewrite the struts-chain build to 
explicitly identify the JARs it needs, when time allows.


I'm not sure this would be better.
Mavenizing struts-chain would be the best, but then with how maven is 
currently operating, you would need to explicitly declare all 
dependencies in struts-chain, thus duplicating struts dependencies in 
this subproject.
My colleague Alejandro Abdelnur, whom I CC here, has a very 
interesting maven enhancement proposal to solve that kind of issue:
...

That Maven enhancement sounds useful, and I've definitely heard 
discussions of the like on the maven-dev list, either related to 
Alejandro's proposal or at least sympathetic to it.

For now, we could just declare that the struts-chain project.xml 
extends the struts project.xml; this would work now without waiting 
for changes to maven which will probably be slow in coming, since they 
are doing a big under-the-hood overhaul for Maven 1.1 Jakarta-Commons 
uses project inheritance extensively, and I've used it myself and it 
pretty much does what we want here -- makes sure that the versions of 
common JAR dependencies track between struts-chain and struts itself.

Thanks Joe: you are definitely right, project inheritance should be 
exactly what's needed for the struts / struts-chain use case.
I had completely forgotten about that possibility, since I've never used 
it yet.

The problem you identified with the example struts-config.xml may 
not be the only one; I tried using that a bit when I was working on 
getting Chain installed, and ended up finding it easier to just put 
the ComposableRequestProcessor in the app I was working on rather 
than getting it working with the struts-chain example app.  If you 
have the time to fix up the struts-config.xml to work correctly, 
patches would be gratefully accepted.  (Preferably attached to a 
bugzilla entry.)

I'll send a patch when I succeed in making that stuff work.
So my understanding is that the current struts-config.xml in 
struts-chain is out of sync with the struts example application, and 
you work with a different web application to test your work.
Do I understand right ?


I believe that's true, and probably more so since Ted has been doing a 
ton of work on the example applications lately.  I'm plugging the 
chain straight into my current project and it's working.

Thanks, I'll try on a simple application then.


The changes I made in struts-nightly struts-config.xml to use the 
ComposableRequestProcessor are:
...
When I do that I get the welcome page but all links go to blank pages.
Did I miss something ?


That all looks correct to me.  You should be able to make those two 
changes (define an alternate processor class in controller-config; 
include Chain plug-in) in any existing Struts application you have and 
have it basically work.

Thanks for your help.

P@

Joe



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