xml data update and its derived data synchronization problem
xml data update and its derived data synchronization problem
- Subject: xml data update and its derived data synchronization problem
- From: "YL" <email@hidden>
- Date: Thu, 18 May 2006 09:32:11 -0600
I have an Entity with an attribute customData storing dynamic information of
unpredictable structure in XML text format.
The instances of the Entity cache their customData in the converted type of
NSDictonary for better performance.
If somehow the customData of an instance been changed by (another session or
another app), through the typical data change notification, the attribute
customData of all the living EO's that represent the same db record will be
updated as expected, but their cached NSDictionary version of data will not
be updated accordingly if no extra programming is done.
Any idea of how to solve the data synchronization problem?
Thanks
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