Greetings,
We are considering replacing some of our custom, home-grown DAS' with Tuscany
DAS. As a result, I have a few Tuscany DAS questions.
1. Does the Tuscany DAS have any support for JDBC Batch Update/Insert
operations?
2. I have a multi-tiered application in which I send a DataGraph of DataObjects
from the middle-tier to a client and later receive the updated DataGraph from
that client. I would like to apply validation to some of the DataObjects in the
DataGraph before the changes are persisted to the database.
a. Is there a mechanism for integrating my validation into the DAS'
applyChanges() operation to avoid the overhead of traversing the ChangeSummary
twice, once by me and once by the DAS?
b. When a single DataObject fails validation, what is the best way for me
to undo the changes to that particular DataObject so the DAS ignores just those
changes and doesn't persist them to the database?
c. The DataGraph of changed DataObjects if often large in my application.
Also, my custom validation logic is quite expensive. So, I would like to break
the DataGraph into multiple "sub-DataGraphs" and execute the validation logic
and the DAS' applyChanges() on separate WorkManager threads. I am doing
something like that today with my own home-grown DAS that is custom to my
trivial data model, whereby the DataGraph is simply a container for a list of
DataObjects that map one-to-one to a database table.
Thanks in advance for your assistance/insights,
- Ron
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