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AribaWeb in Websphere 8
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Hannes  
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 More options Oct 9 2012, 8:41 am
From: Hannes <johannes.test...@gmx.net>
Date: Tue, 9 Oct 2012 05:41:55 -0700 (PDT)
Local: Tues, Oct 9 2012 8:41 am
Subject: AribaWeb in Websphere 8
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Hi,

Today I started evaluating AribaWeb 5.1 and ran into my first problem: It
is a requirement that I have to work with a "dynamic web project" in
eclipse with websphere 8. When I try to deploy a simple HelloWorld app
(that works with the distributed ant/tomcat) and want to load it in the
browser, I get the following exception:

java.lang.NullPointerException
    at
ariba.ui.aribaweb.core.AWConcreteRequestHandler._debugDoRecordAndPlayback(A WConcreteRequestHandler.java:194)
    at
ariba.ui.aribaweb.core.AWComponentActionRequestHandler.handleRequest(AWComp onentActionRequestHandler.java:919)
    at
ariba.ui.aribaweb.core.AWConcreteServerApplication._dispatchRequest(AWConcr eteServerApplication.java:516)
    at
ariba.ui.aribaweb.core.AWConcreteServerApplication.dispatchRequest(AWConcre teServerApplication.java:560)
    at
ariba.ui.aribaweb.core.AWConcreteApplication.dispatchRequest(AWConcreteAppl ication.java:885)
    at
ariba.ui.servletadaptor.AWDispatcherServlet.aribawebDispatcher(AWDispatcher Servlet.java:190)
    at
ariba.ui.servletadaptor.AWDispatcherServlet.doGet(AWDispatcherServlet.java: 259)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
    ...

I debugged for a while and found my problem: In AWJarWalker.create (line
87) the code "url = new URL(urlString);" causes an execption, because my
url is
"wsjar:file:/C:/...../HelloAribaWeb/WebContent/WEB-INF/lib/ariba.aribaweb.j ar!/"
and therefore urlString is
"r:file:/C:/...../HelloAribaWeb/WebContent/WEB-INF/lib/ariba.aribaweb.jar",
because always the first four characters are removed. The exception is
caught somewhere but not printed on the console, but I have it from the
debugger:

java.net.MalformedURLException: unknown protocol: r
    at java.net.URL.<init>(URL.java:586)
    at java.net.URL.<init>(URL.java:476)
    at java.net.URL.<init>(URL.java:425)
    at ariba.ui.aribaweb.util.AWJarWalker.create(AWJarWalker.java:87)
    at
ariba.ui.aribaweb.util.AWClasspathResourceDirectory.initJar(AWClasspathReso urceDirectory.java:433)
    at
ariba.ui.aribaweb.util.AWClasspathResourceDirectory.initJar(AWClasspathReso urceDirectory.java:405)
    at
ariba.ui.aribaweb.util.AWClasspathResourceDirectory.initJar(AWClasspathReso urceDirectory.java:405)
    at
ariba.ui.aribaweb.util.AWClasspathResourceDirectory.autoRegisterJarResource s(AWClasspathResourceDirectory.java:320)
    at
ariba.ui.aribaweb.core.AWConcreteServerApplication.registerResourceDirector ies(AWConcreteServerApplication.java:353)
    at
ariba.ui.aribaweb.core.AWConcreteServerApplication.init(AWConcreteServerApp lication.java:131)
    at
ariba.ui.aribaweb.core.AWConcreteApplication.init(AWConcreteApplication.jav a:293)
    at
ariba.ui.servletadaptor.AWServletApplication.init(AWServletApplication.java :91)
    at
ariba.ui.aribaweb.core.AWConcreteApplication.createApplication(AWConcreteAp plication.java:161)
    at
ariba.ui.servletadaptor.AWDispatcherServlet.createApplication(AWDispatcherS ervlet.java:67)
    at
ariba.ui.servletadaptor.AWDispatcherServlet.init(AWDispatcherServlet.java:5 5)
    at
com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:329 )
    ...

Because of this exception the rest of the initialization is skipped, and
the AWConcreteApplication.RequestContextClass never gets initialized, and
that leads to my NullPointerException.

Can anyone help me with?

Kind regards,
Hannes


 
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František Kolář  
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 More options Oct 9 2012, 3:38 pm
From: František Kolář <franti...@kolar.pro>
Date: Tue, 9 Oct 2012 21:38:04 +0200
Local: Tues, Oct 9 2012 3:38 pm
Subject: Re: AribaWeb in Websphere 8
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Hi Hannes,

Indeed this is 100% correct. There is little limitation but its based on the fact that it follows original Sun J2EE standard about servlet container how jar entries are referenced= > URL should start with Jar: file: /

But as you can see there are specifics made by different vendors that has their own versions of class loaders and this produces not really not really standard variations.
WSjar for webspere, Jboss I think has something like vfjar, oracle app server has coude-source, and so on..

Basically you have two options.

1) replace this AWJarWalker with your fix to handle your container specific behavior
2) Override  registerResourceDirectories method and there call your own implementation of this jar walker.

But I think the fastest in your case would be option #1.

Regards

František Kolář

On Oct 9, 2012, at 2:41 PM, Hannes wrote:


 
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Hannes  
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 More options Oct 10 2012, 4:58 am
From: Hannes <johannes.test...@gmx.net>
Date: Wed, 10 Oct 2012 01:58:09 -0700 (PDT)
Local: Wed, Oct 10 2012 4:58 am
Subject: Re: AribaWeb in Websphere 8
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Hello,

Thank you! I don't really like these solutions, but it works (option #1).
If you are an AribaWeb developer: Did you ever think of fixing this
somehow, since it seems to make problems on widely used application servers?

Kind regards,
Hannes

Am Dienstag, 9. Oktober 2012 21:38:11 UTC+2 schrieb František Kolář:


 
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František Kolář  
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 More options Oct 10 2012, 2:27 pm
From: František Kolář <franti...@kolar.pro>
Date: Wed, 10 Oct 2012 20:27:35 +0200
Local: Wed, Oct 10 2012 2:27 pm
Subject: Re: AribaWeb in Websphere 8
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Hi Hannes,

Not really a AW developer only I implement Ariba comercial products and now I am running some personal projects based on AW. this AWJ.W. is only used for this AribaWeb opensource project.
But It looks like most of us is using this on tomcat platform and any other servletContainer or maximum weblogic that I think still follows the standards not like the other ones including IBM WS ;-)

But you are right this should be fixed.

Regards
František Kolář

On Oct 10, 2012, at 10:58 AM, Hannes wrote:


 
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