4 Replies Latest reply on Jul 11, 2009 7:45 PM by seamseasy

Where do you put the dependency jars??

seamseasy Jul 11, 2009 6:03 AM

Using JBoss Developer Studio 2.0 and Seam 2.1 ... I have a SEAM Web Project with an EJB module. I cannot get the dependencies to behave properly. The project has had several developers working on it and there are dependency jars in web-inf/lib and in EarContents.

I was told the proper approach with SEAM is to put all the dependencies into web-inf/lib and then add references to them in application.xml. This is fine for compilation in the IDE (i.e. it seems to resolve all the classes properly based on the Web App Library item).

The problem is when the EAR is deployed, the EAR is not packed with the dependency jars out of web-inf/lib. How do I resolve this? It seems like duplicating all of them in two locations is a kludgey solution. Is there a standard approach to solving this? None of the SEAM examples I could see actually go far enough to contain external dependencies. Also the documentation seems vague. Any help would be appreciated for this SEAM newbie.

1. Re: Where do you put the dependency jars??

blabno Jul 11, 2009 1:20 PM (in response to seamseasy)

When you have EAR and some objects are passed between WAR and EJB jar the library with class of that object must be located at EAR/lib. If you keep duplicates, then you will have ClassCastException because class will be loaded by two different classloaders.

Read this : http://www.jboss.org/community/wiki/JBossClassLoadingUseCases
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2. Re: Where do you put the dependency jars??

asookazian Jul 11, 2009 4:00 PM (in response to seamseasy)

library placement in seam-gen'ed apps is controlled by the top-level files deployed-jars-ear.list and deployed-jars-war.list. The jars mentioned in deployed-jars-ear.list end up in the EAR/lib directory, and are accessible by all modules of the application. Those from deployed-jars-war.list end in WEB-INF/lib, and are only available to the web-app.

http://seamframework.org/Community/HowToConfigureClassLoadingInSEAMAPP
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3. Re: Where do you put the dependency jars??

seamseasy Jul 11, 2009 6:31 PM (in response to seamseasy)

Yes that's exactly what is happening.

Just one followup... and I think others might benefit from this:

So what is actually supposed to be in web-inf/lib of the top-level project?      If I move everything from there to the EAR then I should take all the entries out of application.xml?

Then I think I link the top-level to the dependencies in the EAR with the manifest files?

Hope that makes sense.    Thanks again for any help.
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4. Re: Where do you put the dependency jars??

seamseasy Jul 11, 2009 7:45 PM (in response to seamseasy)

I saw this doc and looked for those .list files but they're not anywhere around. The project was made in JBoss DS by selecting new-New Seam Web Project

Are these normally put in manually? From what I was reading they show up with a jumpstart tool called SeamGen.. but we aren't using this.
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