[tinyTiM-discuss] [ tinytim-Bugs-2151492 ] Rethink event handling

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Bugs item #2151492, was opened at 2008-10-07 14:49
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Category: Core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Lars Heuer (lheuer)
Assigned to: Lars Heuer (lheuer)
Summary: Rethink event handling

Initial Comment:
- Event system currently blocks (all handlers must handle the event)
- Events are reported before a modification happens (necessary for identity / Topic Maps constraint checking)


Proposal:
- Events should be handled by an instance that checks Topic Maps constraints (blocking op)
- After constraint checking the event is passed to an instance that delivers the events to other subscribers (non-blocking), i.e. to the indexes

- Maybe a before change / after change notification system, indexes need only the after change notification, Topic Maps constraints must be checked in the before change notification

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=631664&aid=2151492&group_id=102341