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From David Blevins <>
Subject Re: Conversion Tool
Date Tue, 06 Feb 2007 14:37:53 GMT
Haven't been able to get a full deploy of anything (tried daytrader  
and the v2 itests), but things are starting to look good with the  
converter.  The basic conversion is happening and conversion of  
things like environment and abstract name queries are definitely  
getting ported over.  Still see some hiccups in CMPs, but apps  
without CMPs may deploy just fine.  Will look into it more when I get  

Dain, can you take a look at the persistence unit part of the  
rewritten EjbModuleBuilder.  Seems something in the way i've reworked  
the code results in those not coming through so well.


On Jan 31, 2007, at 11:05 PM, David Blevins wrote:

> Reposting this info with more details.
> So the 10,000 foot perspective is that we are creating a conversion  
> tool to convert the prior openejb-jar.xml into the new set of  
> descriptors (geronimo-openejb.xml, new openejb-jar.xml, jpa entity- 
> mappings.xml).  It is expected that all existing plans will work  
> and no one will have to or even *should* migrate just yet.
> We are doing this for two reasons:
>  1.  There is significant investment in current descriptor format.   
> These come to mind:
>        - TCK
>        - DayTrader
>        - iTests
>        - Samples
>        - All documentation to date
>        - All user-land apps to date
>  2.  The new plans will not be stable for a good long while.   
> Primary reasons are:
>        - Continued work in integration (security, webservices,  
> corba, etc.)
>        - Continued work implementing JavaEE 5
> So the big motivation for the conversion tool is that with some  
> hard work from Dain and I up front (and for a while really), we can  
> save a few hundred developer and user hours over the next couple  
> months.   We're very close to having something running and hope to  
> see something basically working by the end of the week.
> If we're really lucky after this week we can hide all the change  
> under the conversion tool and no one (but the people working on and  
> maintaining the conversion tool that is) will have to feel the pain  
> or frustration while things move underneath.  As we enable things  
> like security people won't have to update their plans, we'll just  
> add more conversion logic to port that information over and put it  
> into action.
> I can say that the spirit of the new descriptor files is to fully  
> embrace the "anti-descriptor" focus of Java EE 5 and to be as small  
> and contain as little requirements as possible.  Hopefully when the  
> day comes to move over (not soon), it will more be a matter of  
> deleting than adding.  There will definitely be lots of  
> experimentation in that area, so we'll see.
> As always, thoughts and questions very welcome and encouraged.
> -David
> On Jan 31, 2007, at 3:13 PM, Dain Sundstrom wrote:
>> I just checked in the working converter for CMP beans.  There is a  
>> fairly extensive test suite that converts the OpenEJB2 itests,  
>> daytrader and the OpenEJB2 CMR mappings tests.  For example, here  
>> are the mappings for daytrader
>> ejb-jar.xml
>> -----------
>> container/openejb-core/src/test/resources/convert/oej2/cmp/ 
>> daytrader/daytrader-ejb-jar.xml
>> openejb-jar.xml
>> ---------------
>> container/openejb-core/src/test/resources/convert/oej2/cmp/ 
>> daytrader/daytrader-openejb-jar.xml
>> And the final JPA mappings
>> --------------------------
>> container/openejb-core/src/test/resources/convert/oej2/cmp/ 
>> daytrader/daytrader-orm.xml
>> I hope to have the converter fully integrated into Geronimo in by  
>> the end of the week.
>> -dain
>> On Jan 21, 2007, at 11:01 PM, David Blevins wrote:
>>> On Jan 19, 2007, at 5:07 PM, David Blevins wrote:
>>>> Keep your ejb related plan files intact or a copy of them at  
>>>> least.  I'm going to try and write a conversion tool that will  
>>>> at least handle trivial apps.  A non-trivial app would be one  
>>>> with CMPs.  The new mapping.xml format for cmps is the jpa  
>>>> mapping.xml and converting that will be a little more work.
>>>> Nothing done yet, just announcing intentions.
>>> Ok, have a little progress on this.  So far I am able to convert:
>>>  - <environment> and children
>>>  - <security> and children
>>>  - <gbean> and children
>>>  - <message-destination> and children
>>>  - <persistence-context-ref> and children
>>> To see same converted document, look here:
>>> source: 
>>> openejb3/container/openejb-jee/src/test/resources/openejb-jar-2- 
>>> full.xml
>>> result: 
>>> openejb3/container/openejb-jee/src/test/resources/geronimo- 
>>> openejb-converted.xml
>>> It was a bit of work getting JAXB2 to work with our schemas  
>>> because of duplicated elements combined with the fact that we  
>>> allow invalid xml (i.e. no namespace at all).  So I actually had  
>>> to write a invalid 2 valid xml converter before I could get  
>>> started on the openejb-jar.xml to geronimo-openejb.xml converter.
>>> Things should go faster from here.  Will hack more in the morning.
>>> Not sure what the effort is going to be to convert the cmp  
>>> information as that is a openejb-jar.xml 2 jpa mapping.xml  
>>> conversion.  Hoping Dain might have some input on that.
>>> -David

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