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[ANT] standalone workflow exception [message #1409763]

Mon, 18 August 2014 23:50

abdush mohd

Messages: 35
Registered: April 2014

Member

Hi,

I would like to run my transformation workflow from a batch file. I downloaded the ant-emf jar file as explained in this example:

http://http://dev.eclipse.org/svnroot/modeling/org.eclipse.epsilon/trunk/examples/org.eclipse.epsilon.examples.workflow.standalone/

When I run ant from cmd line, the epsilon tasks run fine until I get the following exception in the last flock task:

EXCEPTION: Could not create in the migrated model a model element of type: StateMachine
[epsilon.flock - sc2umlStatechart.mig] Cannot find meta-class 'null' in model 'uml_statechart'
[epsilon.flock - sc2umlStatechart.mig]  at org.eclipse.epsilon.flock.context.EquivalenceEstablishmentContext$EquivalentFactory.createModelElementInMig
ratedModel(EquivalenceEstablishmentContext.java:57)
....

I have no clue what could be the reason for this. The workflow build file just works fine from Eclipse. I tried both metamodelfile or metamodeluri for loadModel task. Any suggestion?

Thanks
Abdu

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Re: [ANT] standalone workflow exception [message #1409947 is a reply to message #1409763]

Tue, 19 August 2014 11:31

Dimitris Kolovos

Messages: 2165
Registered: July 2009
Location: York, UK

Senior Member

Hi Abdu,

Could you please post a minimal example I can use to investigate this?

Cheers,
Dimitris

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Re: [ANT] standalone workflow exception [message #1410146 is a reply to message #1409947]

Wed, 20 August 2014 00:28

abdush mohd

Messages: 35
Registered: April 2014

Member

Hi Dimitris,

I am afraid that the only minimal example possible is the whole project as it is a chain of transformations.
Can I send it to you?

Regards
Abdu

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Re: [ANT] standalone workflow exception [message #1410673 is a reply to message #1410146]

Thu, 21 August 2014 10:58

Dimitris Kolovos

Messages: 2165
Registered: July 2009
Location: York, UK

Senior Member

Hi Abdu,

Smaller examples are always preferable (see [1] for a more detailed discussion) but I'm happy to have a look at the complete chain if isolating the interesting part is not possible.

Cheers,
Dimitris

[1] https://www.eclipse.org/epsilon/doc/articles/minimal-examples/

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Re: [ANT] standalone workflow exception [message #1410764 is a reply to message #1410673]

Thu, 21 August 2014 15:01

abdush mohd

Messages: 35
Registered: April 2014

Member

Hi Dimitris,

I'll try to minimize it. The flock module with problem uses variables passed from two previous modules. I'll see if this has no effect and isolate them.

Thanks
Abdu

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Re: [ANT] standalone workflow exception [message #1410818 is a reply to message #1410764]

Thu, 21 August 2014 17:55

abdush mohd

Messages: 35
Registered: April 2014

Member

Hi Dimitris,

I've attached a minimal example for this. Now the workflow contains only one flock module. I've commented out the code part in the flock module which uses passed variables.

When I run the "run.bat" file I get the error mentioned in the first post. If I run from Eclipse using the launch file provided, it works.

The ant-emf jar I use is the interim version which includes the tasks.xml definitions.

Thanks
Abdu

Attachment: workflow_standalone.zip
(Size: 5.03MB, Downloaded 159 times)

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Re: [ANT] standalone workflow exception [message #1411087 is a reply to message #1410818]

Fri, 22 August 2014 10:57

Dimitris Kolovos

Messages: 2165
Registered: July 2009
Location: York, UK

Senior Member

Hi Abdu,

This was a tricky one. The UML metamodel is a bit more "special" than regular Ecore metamodels. As such, Epsilon provides a dedicated driver for loading UML models [1]. To make use of the UML driver you'd need to replace your epsilon.emf.loadModel task with the following and add the org.eclipse.epsilon.emc.uml plugin JAR, and all the relevant org.eclipse.uml.* plugin JARS (I added all of them just to be on the safe side) to your lib folder. Unfortunately, this will not work with the current version of the Epsilon JARs/plugins, but it should work fine with 1.2 which will be available shortly. Apologies for any inconvenience caused.

<epsilon.loadModel name="uml_statechart" type="UML" impl="org.eclipse.epsilon.emc.uml.UmlModel">
<parameter name="modelFile" value="${outputfile_umlsc}"/>
<parameter name="readOnLoad" value="false"/>
</epsilon.loadModel>

Cheers,
Dimitris

[1] https://dev.eclipse.org/svnroot/modeling/org.eclipse.epsilon/trunk/plugins/org.eclipse.epsilon.emc.uml/src/org/eclipse/epsilon/emc/uml/UmlModel.java

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Re: [ANT] standalone workflow exception [message #1411143 is a reply to message #1411087]

Fri, 22 August 2014 13:52

abdush mohd

Messages: 35
Registered: April 2014

Member

Hi Dimitris,

No issues, Thanks really for your time. Looking forward for the next release Smile

.

I am just wondering if it works from Eclipse, should it not also work when adding "all" those needed jars into the lib folder?

Thanks
Abdu

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Re: [ANT] standalone workflow exception [message #1411199 is a reply to message #1411143]

Fri, 22 August 2014 16:43

Dimitris Kolovos

Messages: 2165
Registered: July 2009
Location: York, UK

Senior Member

Hi Abdu,

I suspect that when the UML plugin is loaded by Eclipse it does its magic - which is not the case when it's loaded by the Java classloader.

Cheers,
Dimitris

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