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[COMPARE / TENEO] how can I apply a diff to an existing EObject without the NPE? [message #100919]

Wed, 07 November 2007 01:10

Jason Henriksen

Messages: 231
Registered: July 2009

Senior Member

Hi All,

I'm getting this exception running EMF Compare in a
WebSphere SOAP service. I can't just call save on the XML backed object
because that will cause Hibernate to do an insert instead of an update.

================================
Caused by: java.lang.Throwable: java.lang.NullPointerException
at
org.eclipse.emf.compare.diff.service.DiffService.parseExtens ionMetadata(DiffService.java:195)
at
org.eclipse.emf.compare.diff.service.DiffService.<clinit>(DiffService.java:54)
at
java.lang.J9VMInternals.initializeImpl(Native Method)
================================

I've gotten one EObject graph out of Teneo and the other from
deserializing a SOAP request. Here's the code:

=================================
//--- get an updated EObject from XML
consumerUpdateInput =
(ConsumerUpdateRequest)soapUtil.
getObjectFromSoap(consumerUpdateRequest);
consumerXML = consumerUpdateInput.getConsumer();

//--- get the real one from the DB
int consumerKey = consumerXML.getConsumerSK();
consumerSQL = (Consumer)session.load("Consumer",
new Integer(consumerKey));

//--- apply the changes to the DB backed object.
Resource leftRes = new XMLResourceImpl();
leftRes.setURI(URI.createURI("leftRes.xml"));
leftRes.getContents().add((EObject)consumerSQL);

Resource rightRes = new XMLResourceImpl();
rightRes.setURI(URI.createURI("rightRes.xml"));
rightRes.getContents().add((EObject)consumerXML);

//!!! This line throws the exception
final MatchModel match = new DifferencesServices().modelMatch(
(EObject)consumerSQL,
(EObject)consumerXML,
new NullProgressMonitor(),
Collections.<String, Object> emptyMap());

final DiffModel diff = new DiffMaker().doDiff(match);
EList<DiffElement> e = diff.getOwnedElements();
ListIterator li = e.listIterator();
while(li.hasNext()){
DiffElement element = (DiffElement)li.next();
AbstractMerger merger = MergeFactory.createMerger(element);
merger.applyInOrigin();
}

//--- save the updated consumer.
session.save(consumerSQL);
session.getTransaction().commit();
resultMessage.setCode("SUCCESS");
==============================

Any help is very much appreciated,

Jason Henriksen

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Re: [COMPARE / TENEO] how can I apply a diff to an existing EObject without the NPE? [message #100979 is a reply to message #100919]

Wed, 07 November 2007 08:51

Laurent Goubet

Messages: 1902
Registered: July 2009

Senior Member

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--------------040204010808000801010900
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit

Jason,

From the little bit of stack trace you've posted, I would think the
failing line is not the one you've highlighted (final MatchModel match =
new DifferencesServices().modelMatch(...)) but the one directly
following (final DiffModel diff = new DiffMaker().doDiff(match);). Are
you sure about the exact line?

Other than that, could you give me the exact tag of the build you use
-on eclipse.org download page, something like "I200710230727"- (or if
you're using a CVS version, the date of your checkout)? I'd also like
you to post the full stack trace of the failure since I cannot pinpoint
the problem.

And as a side note even if this is not relevant, calling
MergeService#merge(DiffElement) instead of creating the merger from the
factory yourself will probably prove easier. Keep in mind that we are in
the process of enabling merging for standalone use so you'll probably
have to use the nightly that should be made available today.

Regards,
Laurent Goubet
Obeo

jason henriksen a

Report message to a moderator

Re: [COMPARE / TENEO] how can I apply a diff to an existing EObject without the NPE? [message #101160 is a reply to message #100979]

Wed, 07 November 2007 17:16

Jason Henriksen

Messages: 231
Registered: July 2009

Senior Member

Here's the full stack trace:

Caused by: java.lang.NoClassDefFoundError:
org.eclipse.emf.compare.diff.service.DiffService (initialization failure)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:123)
org.eclipse.emf.compare.diff.generic.DiffMaker.doDiff(DiffMa ker.java:139)
org.eclipse.emf.compare.diff.generic.DiffMaker.doDiff(DiffMa ker.java:91)
com.vsp.ConsumerSearchSOAPImpl.update(ConsumerSearchSOAPImpl .java)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:64)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe thodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:615)
com.ibm.ws.webservices.engine.dispatchers.java.JavaDispatche r.invokeMethod(JavaDispatcher.java:178)
com.ibm.ws.webservices.engine.dispatchers.java.JavaDispatche r.invokeOperation(JavaDispatcher.java:141)
com.ibm.ws.webservices.engine.dispatchers.SoapRPCProcessor.p rocessRequestResponse(SoapRPCProcessor.java:447)
com.ibm.ws.webservices.engine.dispatchers.SoapRPCProcessor.p rocessMessage(SoapRPCProcessor.java:412)
com.ibm.ws.webservices.engine.dispatchers.BasicDispatcher.pr ocessMessage(BasicDispatcher.java:134)
com.ibm.ws.webservices.engine.dispatchers.java.SessionDispat cher.invoke(SessionDispatcher.java:204)
... 28 more
Caused by: java.lang.Throwable: java.lang.NullPointerException
org.eclipse.emf.compare.diff.service.DiffService.parseExtens ionMetadata(DiffService.java:195)
org.eclipse.emf.compare.diff.service.DiffService.<clinit>(DiffService.java:54)
at java.lang.J9VMInternals.initializeImpl(Native Method)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:177)
... 41 more

Basically, it's just getting the NPE during the static constructor and
then being unable to initialize the class. I'm using the
emft-compare-SDK-incubation-I200710230727.jar.

Do you think I'm better off to go directly against the code in CVS?

This project is going to be a real life saver for me. I'm excited to
get it up and running. If I'm able to come up with any solutions on my
end, I'll be sure to let you know.

Thanks,

Jason

laurent Goubet wrote:
> Jason,
>
> From the little bit of stack trace you've posted, I would think the
> failing line is not the one you've highlighted (final MatchModel match =
> new DifferencesServices().modelMatch(...)) but the one directly
> following (final DiffModel diff = new DiffMaker().doDiff(match);). Are
> you sure about the exact line?
>
> Other than that, could you give me the exact tag of the build you use
> -on eclipse.org download page, something like "I200710230727"- (or if
> you're using a CVS version, the date of your checkout)? I'd also like
> you to post the full stack trace of the failure since I cannot pinpoint
> the problem.
>
> And as a side note even if this is not relevant, calling
> MergeService#merge(DiffElement) instead of creating the merger from the
> factory yourself will probably prove easier. Keep in mind that we are in
> the process of enabling merging for standalone use so you'll probably
> have to use the nightly that should be made available today.
>
> Regards,
> Laurent Goubet
> Obeo
>
> jason henriksen a écrit :
>>
>> Hi All,
>>
>> I'm getting this exception running EMF Compare in a
>> WebSphere SOAP service. I can't just call save on the XML backed
>> object because that will cause Hibernate to do an insert instead of an
>> update.
>>
>> ================================
>> Caused by: java.lang.Throwable: java.lang.NullPointerException
>> at
>> org.eclipse.emf.compare.diff.service.DiffService.parseExtens ionMetadata(DiffService.java:195)
>>
>> at
>> org.eclipse.emf.compare.diff.service.DiffService.<clinit>(DiffService.java:54)
>>
>> at
>> java.lang.J9VMInternals.initializeImpl(Native Method)
>> ================================
>>
>>
>> I've gotten one EObject graph out of Teneo and the other from
>> deserializing a SOAP request. Here's the code:
>>
>> =================================
>> //--- get an updated EObject from XML
>> consumerUpdateInput =
>> (ConsumerUpdateRequest)soapUtil.
>> getObjectFromSoap(consumerUpdateRequest);
>> consumerXML = consumerUpdateInput.getConsumer();
>>
>> //--- get the real one from the DB
>> int consumerKey = consumerXML.getConsumerSK();
>> consumerSQL = (Consumer)session.load("Consumer",
>> new Integer(consumerKey));
>>
>> //--- apply the changes to the DB backed object.
>> Resource leftRes = new XMLResourceImpl();
>> leftRes.setURI(URI.createURI("leftRes.xml"));
>> leftRes.getContents().add((EObject)consumerSQL);
>>
>> Resource rightRes = new XMLResourceImpl();
>> rightRes.setURI(URI.createURI("rightRes.xml"));
>> rightRes.getContents().add((EObject)consumerXML);
>>
>> //!!! This line throws the exception final MatchModel match
>> = new DifferencesServices().modelMatch(
>> (EObject)consumerSQL,
>> (EObject)consumerXML,
>> new NullProgressMonitor(),
>> Collections.<String, Object> emptyMap());
>>
>> final DiffModel diff = new DiffMaker().doDiff(match);
>> EList<DiffElement> e = diff.getOwnedElements();
>> ListIterator li = e.listIterator();
>> while(li.hasNext()){
>> DiffElement element = (DiffElement)li.next();
>> AbstractMerger merger = MergeFactory.createMerger(element);
>> merger.applyInOrigin();
>> }
>> //--- save the updated consumer.
>> session.save(consumerSQL);
>> session.getTransaction().commit();
>> resultMessage.setCode("SUCCESS");
>> ==============================
>>
>> Any help is very much appreciated,
>>
>> Jason Henriksen
>

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Re: [COMPARE / TENEO] how can I apply a diff to an existing EObject without the NPE? [message #101942 is a reply to message #101160]

Thu, 08 November 2007 10:13

Laurent Goubet

Messages: 1902
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------060507090006000100070306
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit

Hi,

We completed yesterday the process of fully enabling EMF Compare to be
launched standalone, and made available a nightly presenting this
functionnality.

Could you try your use case with this last nightly and provide us with
feedback against this particular failure?

If this still fails with the last nightly, I'd need more information
about your particular use case. Your stack trace indicates that you are
running EMF Compare from within an eclipse, but your eclipse fails at
retrieving the diff engine extension point, which strikes me as ... more
than strange :).

You told you're using EMF Compare in a websphere SOAP service, could you
elaborate your usecase (eclipse version, java version, way you are
calling EMF Compare and the such-like).

Cheers,
Laurent Goubet
Obeo

jason henriksen a

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