Forum LAMS for Tech-Heads - General Forum: java.lang.ClassNotFoundException

By: Ernie Ghiglione

[ Reply | Forward ]

HI Felipe,

It seems that you are missing the jtwitter library in your classpath. Where is this library?

Thanks,

Ernie

Posted by Ernie Ghiglione

By: Felipe Peña

[ Reply | Forward ]

Hi Ernie

The library has this path: web/WEB-INF/lib/jtwitter.jar

Thanks

Felipe

Posted by Felipe Peña

By: Felipe Peña

[ Reply | Forward ]

Any help please?

Posted by Felipe Peña

By: Andrey Balan

[ Reply | Forward ]

Hi Felipe,

Perhaps, you're missing jtwitter.jar from the war file produced by your tool.
Could you please check this idea?

Cheers,

Posted by Andrey Balan

By: Felipe Peña

[ Reply | Forward ]

Hi Andrey

Thanks for your help.

I'm clearly missing the jtwitter.jar file inside the war. The thing is, on my build.xml I include this path in order to add this jar.

Anyway, I did attach it in case I'm missing anything else.

Regards!

Posted by Felipe Peña

By: Felipe Peña

[ Reply | Forward ]

Hi Andrey

I checked the references in the build.xml and they include the jars on the web/WEB-INF/lib folder.

Still, they're not include in the war file.

What could probably be wrong?

Regards!

Posted by Felipe Peña

By: Andrey Balan

[ Reply | Forward ]

Hi Felipe,

You can try adding a lib task to the "build-war" Ant target.
Smth like this:
<lib dir="${path_to_jar_files}">
    <include name="*.jar"/>
</lib>


I hope this will help

Cheers

Posted by Andrey Balan

By: Felipe Peña

[ Reply | Forward ]

I tried to add that but it throws an error while building the war (deploy-war action).

BUILD FAILED
/Users/patrosmania/Documents/Tesis/lams/lams_tool_twitter/build.xml:205: Problem: failed to create task or type lib
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.


I've also add the include line adding the lib folder. It does include the jar files into the war but when I try to view the Learner activity it keeps throwing the java.lang.ClassNotFoundException

I attached an image file with the build-war xml code.

Cheers

Posted by Felipe Peña

By: Andrey Balan

[ Reply | Forward ]

I'm sorry for not being clear.

This <lib> task should be inserted into <war> task i.e.

<target name="build-war"...
    <war warfile="...
    ...
        <lib dir="...


Best

Posted by Andrey Balan

By: Felipe Peña

[ Reply | Forward ]

Thanks fro your help Andrey.

I did add that and it included the jar files inside the war.

But it still throws the java.lang.ClassNotFoundException.

Just an idea. Probably I could send you my entire tool so you could check what's wrong.

Posted by Felipe Peña

By: Andrey Balan

[ Reply | Forward ]

Felipe,

If possible can you zip it and attach it to your next post?
And I'll try to figure out what's wrong with it

Best,

Posted by Andrey Balan

By: Felipe Peña

[ Reply | Forward ]

Hi Andrey

The zip is attached.

Thanks for your help!

Posted by Felipe Peña

By: Felipe Peña

[ Reply | Forward ]

Hey Andrey! Sorry to bother you.

I just wanna know if you had the time to give a sneak peek to my LAMS tool.

I'd really appreciate it!

Thanks in advance.

Posted by Felipe Peña

By: Felipe Peña

[ Reply | Forward ]

Hey Andrey. I don't know if this would help.

When I deploy my tool, I go and see the build/deploy folder and the war is there. Then, I look inside it and the jar files are in the web/WEB-INF/lib folder.

Now, when I go to the JBOSS folder, server/default/deploy/lams.ear folder, the tool's war is also there, but it's not the same as the one placed in the tool's build folder.

My point is that probably the process of copying the war into de JBOSS folder is failing.

Appreciate your help.

Thanks.

Posted by Felipe Peña

By: Andrey Balan

[ Reply | Forward ]

Hi Felipe,

I was able to replicate your problem. Not so sure why it happens though.

You can simply copy these 2 jar files into server/default/deploy/lams.ear folder. It will solve the problem


Best

Posted by Andrey Balan

By: Felipe Peña

[ Reply | Forward ]

Hi Andrey

I did manage to solve the problem. I re deployed my tool from scratch and the war with the 2 jars inside, copied to the lams.ear folder.

After I do that, I change a parameter from true to false in the build.xml file (for later deployments), in order to avoid issues with the the tool's database records.

From now on, I'll just manually copy the war into the lams.ear folder.

Thanks for your help!

Posted by Felipe Peña