Using External JARs in a Web Dynpro Project

Question

Hi,
I'm having some difficulties building and deploying a Web Dynpro application that uses the Apache JaxMe libraries.  We're using SP11 of Developer Studio and WebAS and we're using JDI Scenario 2+ for building and deployment.  Thus far here's the procedure I followed:
1) Created a DC of type "External Library"
2) Added the necessary jars to the "libraries" folder of the External Library DC project (the jars that I added were jaxme2-rt.jar, jaxme2.jar, jaxmeapi.jar, jaxmejs.jar, jaxmepm.jar, jaxmexs.jar, xercesImpl.jar, xml-apis.jar all of which were pulled from the Apache JaxMe implementation download)
3) For each of the jars in the libraries folder I right-clicked, selected Develoment Component then clicked "Add to public part" 
Then after reading this note:
https://websmp206.sap-ag.de/~form/sapnet?_FRAME=CONTAINER&_OBJECT=012006153200000038152005
I created a J2EE Library Component DC following these steps:
1) Created a new DC of type J2EE Server Component / Library
2) Added the External Library DC that I had just created as a "Used DC"
3) Edited the DC so that it is used a Build Time and Run Time
Finally I went to the Web Dynpro application and included the J2EE Library Component DC as a Used DC at build time and run time. 
I was able to build all of the project successfully (doing a DC build for each) then I was able to succesfully deploy the applications to my local development WebAs (by doing a DC deploy for both the J2EE Server Component and the Web Dynpro application)  The problem is that at runtime the Web Dynpro application cannot find the external libraries.  For example, I receive the following error when running the application:
java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
The "missing" class is included in one of the jars but for some reason these jars are not accessible to Web Dynpro at runtime. 
Any help you can provide on this problem is very much appreciated.
Thanks in advance!
Jason

Answer 1

I created the <b>JAR</b> with the following class (structure):
   <b>com.sap.tc.webdynpro.tests.utils.TableSorter.class</b>
I have followed the steps that was suggested in the forum:
==========================================================
1) creating an Extneral library DC
2) import the JAR "com.sap.tc.webdynpro.tests.util.jar" to the libraries folder of the External Library DC project
3) Right-click on the JAR imported to the project and add them to the public part.
This DC is now ready to be used as a build-time reference that will allow CBS to build the "main" Web Dynpro application that will use the external libraries. Next, we have to create a new Web Dynpro DC to hold the class files here are the steps:
1) Create a new Web Dynpro DC
2) Create a new public part, selecting the "Can be packaged into other build results" option
3) Rename the JARs as Zip files and extrct the full content (folders and class files) to your root folder
4) Import the folders and files to the src/packages folder
5) Expand the public part node that was created and select the "Entities" node, right-click it and choose Edit
6) In the Entity Type list select the "Folder" option then in the selected entities tree pick each of the folders that you imported in step 5 (above)
7) Now do a DC build and a DC deploy of the project
Then check-in, activate, and release any activities you have associated with creating these two projects. In the DC perspective, refresh the Active DCs and Inactive DCs to ensure that both new DCs appear in the Active list. Now we have to setup the references to these DCs in our main Web Dynpro application. To do this, follow these steps:
1) Open the Web Dynpro perspective and right click the Used DCs node then choose "Add Used DC.."
2) Pick the public part of the External Library DC that we created (first) and set it to have a Build Time dependency
3) Again, right click the Used DCs node and choose "Add Used DC.." then choose the public part of the Web Dynpro DC that we created and give it a Run Time dependecy (weak) and click finish.
4) Now, due to what I think is a bug. You must right click on the Web Dynpro "used DC" that you just added in the previous step, and set the run time dependency again (it seems to revert to the default values for some reason)
5) Now do a DC build and a DC deploy on the "main" web dynpro application.
6) Check-in, activate, and release any activities associated with adding these references and then others on your team may use the classes in the external libraries within the Web Dynpro project.
However, when I executed, the following exception occurred:
===========================================================
Error stacktrace:
java.lang.<b>NoClassDefFoundError</b>: <i>com/sap/tc/webdynpro/tests/utils/TableSorter</i>
     at br.com.embraer.materiais.zdplmm001.view.Zdplmm001_0500View.wdDoModifyView(Zdplmm001_0500View.java:138)
<b>What's missing????</b>
Thanks
Robson Lima
Sao Paulo - Brazil