Re: [mdr-users] Clustering the UML for Traceability

Also, from the maven.log and from the source code I found out there 
might be several problems:
1) in initMDR() you first try to call createExtent(), if that fails you 
call getExtent() - from the log I see the create extent fails saying 
that extent with the same name already exists - this means you are 
trying to run the test with existing storages that were created by a 
previous test.
2) if you still want to run with existing storage, you should reverse 
the order of createExtent and getExtent operations - first call 
getExtent() to check whether the extent already exists, then call 
createExtent() if getExtent() returned null. This way you will prevent 
the exception and switching MDR to a "fail" state.
3) if createExtent() fails, it initiates a rollback (switches the 
transaction into a "fail" state to make sure a rollback is performed 
when the outer transaction is finalized) - however, you just catch the 
exception (do not end the transaction), log it and continue performing 
further operations - this may cause problems - you should finalize the 
transaction and do the other stuff in a separate transaction
Regards,
Martin

Pieter Van Gorp wrote:

>Hi Martin and others,
>I've managed to generate the JMI interfaces for a tracing metamodel
>that clusters the UML metamodel.  I've attached the MOF-XMI (see
>traceMMmof.xml).
>
>I have a test in which I create a trace between two UML attributes. 
>I'm not sure if I'm using the NB/JMI API right when creating the
>clustering extent: I create a new extent and pass an array of size one
>in which the UML application model is stored.  When serializing the
>trace extent to XMI, no problems are reported but the references to
>the UML attributes are in fact dangling IDREFs instead of HREFs to the
>original UML-XMI file.
>
>Even worse, I get a classcastexception when trying to create a new
>trace extent to test whether the XMI for the traceability model
>contains the required information:
>org.netbeans.api.mdr.CreationFailedException: Cannot instantiate
>package because of unexpected exception: java.lang.ClassCastException
>        at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositoryImpl.java:472)
>        at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositoryImpl.java:292)
>        at be.ac.ua.fots.motmot.prototypes.crossreferences.TestMDR.testReadTraceBetweenUmlAttributes(TestMDR.java:176)
>
>I've attached the source of my test and the output of its execution by Maven.
>
>I hope I've simply used the API "a little bit" wrong... by the way,
>I'm setting up some documentation about MOF clustering that I'll
>publish on my website once I've get this prototype right...
>
>Looking forward to hear from you,
>Pieter Van Gorp.
>
>  
>