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migrate instances to newer metamodel [message #488434]

Mon, 28 September 2009 16:07

Daniel

Messages: 34
Registered: July 2009

Member

Hi,

Is there a "best practice" to migrate model instances if the metamodel
(ecore) has changed?

I've heard about edapt/cope but I don't know if it is already usable.

Otherwise I somehow have to keep multiple versions of the plugin with
the generated code to be able to load every instance with its respective
metamodel. (I want to compare the models later with emf compare)
(Suggestions to this approach are also welcome.)

Thanks for your help

Daniel

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Re: migrate instances to newer metamodel [message #488446 is a reply to message #488434]

Mon, 28 September 2009 17:06

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
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Daniel,

Comments below.

Daniel wrote:
> Hi,
>
> Is there a "best practice" to migrate model instances if the metamodel
> (ecore) has changed?
Make sure you make only binary compatible changes and you need to do no
work at all.
>
> I've heard about edapt/cope but I don't know if it is already usable.
I think it's still starting up.
>
> Otherwise I somehow have to keep multiple versions of the plugin with
> the generated code to be able to load every instance with its
> respective metamodel. (I want to compare the models later with emf
> compare)
> (Suggestions to this approach are also welcome.)
Have a look at
<http://wiki.eclipse.org/EMF/Recipes#Recipe:_Data_Migration>

http://wiki.eclipse.org/EMF/Recipes#Recipe:_Data_Migration

>
> Thanks for your help
>
> Daniel

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Daniel, 
 
Comments below. 
 
Daniel wrote:
<blockquote cite="mid:h9qn03$ojr$1@build.eclipse.org" type="cite">Hi,
 
 
Is there a "best practice" to migrate model instances if the metamodel
(ecore) has changed?
 
</blockquote>
Make sure you make only binary compatible changes and you need to do no
work at all. 
<blockquote cite="mid:h9qn03$ojr$1@build.eclipse.org" type="cite"> 
I've heard about edapt/cope but I don't know if it is already usable.
 
</blockquote>
I think it's still starting up. 
<blockquote cite="mid:h9qn03$ojr$1@build.eclipse.org" type="cite"> 
Otherwise I somehow have to keep multiple versions of the plugin with
the generated code to be able to load every instance with its
respective

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: migrate instances to newer metamodel [message #488825 is a reply to message #488434]

Wed, 30 September 2009 12:30

Dirk Hoffmann

Messages: 163
Registered: July 2009

Senior Member

Daniel schrieb:
> Hi,
>
> Is there a "best practice" to migrate model instances if the metamodel
> (ecore) has changed?
>
> I've heard about edapt/cope but I don't know if it is already usable.
>
> Otherwise I somehow have to keep multiple versions of the plugin with
> the generated code to be able to load every instance with its respective
> metamodel. (I want to compare the models later with emf compare)
> (Suggestions to this approach are also welcome.)
>
> Thanks for your help
>
> Daniel

Almost the same conversation you find when looking for a message titled

"Best practices for versioning and migration" :-)

Regards,
Dirk

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