On Dec 9, 2006, at 6:48 AM, Dov Rosenberg wrote:
The main reason for my question centers around the fact that in
some places
of our app we needed to use JDBC directly for performance reasons
(mainly
the bulk operations). Of course when that happens the object graph
can get
out of sync with reality.
All editingcontexts (including the shared editing contexts) would
need to be
informed. In our case doing an invalidate would probably be pretty
costly
since it might get triggered on a frequent basis.
That depends on how many objects you are invalidating (I am not
reccomending invalidating all of them!) and how many editing contexts
have those objects faulted into them.
If we wanted to freshen only the current editing context is there a
way to
do that?
You could fetch raw rows and merge them into the EOs in the editing
context. But that would not update the snapshot so you would not be
able to save without getting an optimistic locking failure. Anything
else is going to update the snapshot and doing so will send
notifications to all the other editing contexts.
Chuck
On 12/8/06 11:26 PM, "Chuck Hill" <[EMAIL PROTECTED]> wrote:
This always makes my head hurt, but I will take a stab at it.
invalidate: tosses the snapshot, affects all editing contexts.
Forces the data to be refetched from the database.
refault: changes the eo back into a fault in the EC. Depending on
the EC's fetch timestamp and the snapshot's age, it _may_ go back to
the database for fresh data when the fault is fired. I think this
discards any uncommited changes.
refresh: pretty much the same as refault, but merges uncommitted
changes back into eo.
I have found problems with refault() and refresh() and created my own
versions that you can find in EOObject in our GVCEOFExtensions
framework. Sorry, but I don't recall the details right now.
Chuck
On Dec 8, 2006, at 2:10 PM, Dov Rosenberg wrote:
What is the difference between Invalidating an object versus
refreshing versus refaulting?
It seems that some of the methods call the others. Any commentary
on which should be used and when would be appreciated. Thanks in
advance
--
Dov Rosenberg
Conviveon/Inquira
Knowledge Management Experts
http://www.conviveon.com
http://www.inquira.com
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Dov Rosenberg
Inquira Inc
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