Re: Invalidate vs Refresh vs Refault
Re: Invalidate vs Refresh vs Refault
- Subject: Re: Invalidate vs Refresh vs Refault
- From: Kieran Kelleher <email@hidden>
- Date: Mon, 11 Dec 2006 09:52:05 -0500
Freshen the current editing context is easy .......
editingContext.setFetchTimestamp( new java.util.Date().getTime() );
Now any EO's that you touch will be refreshed if their fetch
timestamp is older than the time at which you executed the above
statement.
On Dec 9, 2006, at 9:48 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.
If we wanted to freshen only the current editing context is there a
way to
do that?
Dov Rosenberg
On 12/8/06 11:26 PM, "Chuck Hill" <email@hidden> 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
370 Centerpointe Circle, ste 1178
Altamonte Springs, FL 32701
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(407) 339-6704 (fax)
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