Hi Christophe,
Some early comments:
Slide 4 - The upcoming DAS...
"DAS can be seen as the main consumer for ChangeSummary"
I disagree with this statement. DAS owned DataGraph and at a time
DataGraph was the sole owner of ChangeSummary, when DataObjects were
given the ability to have ChangeSummary properites then SDO users
developed their own uses for ChangeSummary (based on a diff for the
graph). I think we're starting off on the wrong foot to break
backwards compatibility here.
Slide 8 - How does it work? (2/2)
"At XML serialization time, orphan objects are added to orphan
properties and then belong to the containment tree"
How I read this is XML serialization now involves 2 passes. The first
is to determine who the orphans are, the second to actually do the XML
serialization. SDO 3.0 XML serialization will therefore be slower than
SDO 2.1/2.1.1 XML serialization.
Slide 18 - Objectives
"Make events recorded in the ChangeSummary more easily usable by a
DAS"
Persistence solutions work quite well knowing the only the diff in a
graph (current ChangeSummary definition). I believe the objective
being proposed is make the events in the ChangeSummary directly usable
by a DAS (i.e. a delete means remove the item from the database, as
opposed to JPA that interprets the difference in the graph and based on
the mapping metadata decides how to act).
Slide 23 - How to track "Moves"?
Isn't this what is currently done today in SDO 2.1/2.1.1?
-Blaise
Christophe Boutard wrote:
1348C4A8B6B9AF46A57B2CAA346E9C83DE7601@MAIL02.bedford.progress.com"
type="cite">
Hi all,
Please find the presentation for the
ChangeSummary
discussion.
BR,
--CB
Christophe
Boutard
Development Manager, Data Services
Phone: +33 (0)1 46 14 13 06 | Fax:
+33 (0)1 46 14 13 01
Email: christophe.boutard@datadirect.com
DataDirect Technologies
21 rue des Trois Fontanots | 92000 |
Nanterre | France
www.datadirect.com
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