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https://issues.apache.org/cayenne/browse/CAY-971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrus Adamchik closed CAY-971.
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Resolution: Fixed
Fix Version/s: 3.0
> ROP GraphDiff "compressor"
> --------------------------
>
> Key: CAY-971
> URL: https://issues.apache.org/cayenne/browse/CAY-971
> Project: Cayenne
> Issue Type: Improvement
> Components: Cayenne Core Library
> Reporter: Ari Maniatis
> Assignee: Andrus Adamchik
> Fix For: 3.0
>
>
> In ROP, NodePropertyChangeOperation events are sent from the client to the
> server on commit. These make up a ObjectContextChangeLog and are applied in
> order on the server. However this results in excess network traffic in
> situations where the client application might update attributes many times
> before commit. In our case, we update on every keystroke.
> Currently, ObjectContextChangeLog is an ArrayList of GraphDiffs
> (NodePropertyChangeOperations in this situation). Markers seem to also
> separate groups of GraphDiffs (is this for rollback and nested transactions?)
> Should this become an ArrayList of markerGroups, each of is a
> Map<ObjectAttribute, GraphDiff> and therefore redundant events will not end
> up in the ObjectContextChangeLog? Or is this too simplistic...
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