RE: [cosmos-dev] CBE persistence work

[Hubert H Leung <hkyleung@xxxxxxxxxx>]

Hi Harm,

In the COSMOS framework, there is a
way to configure data sources, and data sinks, and potentially other layers
in between like filters and transformers.  The demo that we are trying
to create is for demostrating the use of this framework.  i.e. plug
in different data source agents and data sinks to complete the data flow.
  We already have a GLA data source that outputs CBE object (EMF CBE
objects).  I am writing a data sink that takes the CBE objects and
write the data into database.  One requirement I got was not to use
the EMF model.  That is why I have a layer for converting EMF-CBE
to non-EMF-CBE.  Then I use iBatis to read/write data from the non-EMF
data model to/from database.  I could have replaced some blades in
the GLA to output non-EMF object.  I have chosen not to do that just
because of time constraint to get an end-to-end demo working quickly.  I
could also replace the GLA outputter blade to write data to database directly,
but that would bypass the COSMOS framework and defeats the purpose of the
demo.  

That's the motivation behind this work.
 Let me know if you have suggestions on what to do around this area.
 


Regards,
_________________________
Hubert Leung
IBM Toronto Lab
hkyleung@xxxxxxxxxx
905-413-3382

Harm Sluiman/Toronto/IBM@IBMCA
Sent by: cosmos-dev-bounces@xxxxxxxxxxx

05/31/2007 03:10 PM

Please respond to
Cosmos Dev <cosmos-dev@xxxxxxxxxxx>

To	Cosmos Dev <cosmos-dev@xxxxxxxxxxx>
cc	"Cosmos Dev" <cosmos-dev@xxxxxxxxxxx>, cosmos-dev-bounces@xxxxxxxxxxx
Subject	RE: [cosmos-dev] CBE persistence work

I understand that, but I am just reading the picture which refers to EMF-CBE
which I assume to be the CBE that builds from EMF in order to be reused
as an SDO as opposed to any persistent CBE model. 
This also happens to be a transient object in many GLA configurations.
I am simply poking on the GLA aspect of this. 

The picture implies several transforms and mappings and it seemed this
could be slimmed down. For example you could use the pojo CBE in the gla
config (you would need to provide a new mapping "blade" for the
configuration) and then an outputter that could feed (or be) your persistence
code. 

Thanks for your time.
________________
Harm Sluiman,
IBM Distinguished Engineer
phone:905-413-4032   fax: 4920  cell: 1-647-300-4758
mailto:sluiman@xxxxxxxxxx
Admin : Queenie Lam qlam@xxxxxxxxxx  Tie: 969-5864 1-905-413-5864

"Ebright, Don" <Don.Ebright@xxxxxxxxxxxxx>
Sent by: cosmos-dev-bounces@xxxxxxxxxxx

05/31/2007 03:02 PM

Please respond to
Cosmos Dev <cosmos-dev@xxxxxxxxxxx>

To	"Cosmos Dev" <cosmos-dev@xxxxxxxxxxx>
cc
Subject	RE: [cosmos-dev] CBE persistence work

Harm, 
  
We do not intend for any EMF models to be used within COSMOS.  We
hope to deliver POJOs to a TPTP loader component that can populate the
EMF model. 
  
Don

---

From: cosmos-dev-bounces@xxxxxxxxxxx
[mailto:cosmos-dev-bounces@xxxxxxxxxxx] On Behalf Of Harm Sluiman
Sent: Thursday, May 31, 2007 2:04 PM
To: Cosmos Dev
Subject: Re: [cosmos-dev] CBE persistence work


Hubert I had a look at this and question the use of EMF-CBE. Perhaps I
am reading at the wrong level. 
You could used existing GLA adaptors and plugin via the configuration a
different outputer that does your database writes. Is this what you are
proposing or are you taking a GLA config that produces EMF-CBEs from the
outputer and calling that your GLA source? This would seem like a lot of
extra footprint and processing. 


Thanks for your time.
________________
Harm Sluiman,
IBM Distinguished Engineer
phone:905-413-4032   fax: 4920  cell: 1-647-300-4758
mailto:sluiman@xxxxxxxxxx
Admin : Queenie Lam qlam@xxxxxxxxxx  Tie: 969-5864 1-905-413-5864

Hubert H Leung/Toronto/IBM@IBMCA
Sent by: cosmos-dev-bounces@xxxxxxxxxxx

05/30/2007 03:41 PM

Please respond to
Cosmos Dev <cosmos-dev@xxxxxxxxxxx>

To	cosmos-dev@xxxxxxxxxxx
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Subject	[cosmos-dev] CBE persistence work

Here is the wiki page that document my work on writing and reading CBE
to RDB using iBatis and the problems encountered:  http://wiki.eclipse.org/index.php/COSMOS_CBE_RDB


_________________________
Hubert Leung
IBM Toronto Lab
hkyleung@xxxxxxxxxx
905-413-3382_______________________________________________
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