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MultiECLockManager
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MultiECLockManager


  • Subject: MultiECLockManager
  • From: Kent Harris <email@hidden>
  • Date: Tue, 4 May 2004 19:26:43 -0700

After reading the EC lock discussion I'm confused (again.)

I'd like to incorporate Jonathan Rochkind's MultiECLockManager. As I understand it, it is tied to the session object. However, there is no convenient way to get to the session (a WO object) from an enterprise object. I have read Appendix A in the "Enterprise Objects" document wherein they sneak the session into the editing context's delegate but I have a more difficult problem. I'm using a modified JCAuthentication framework to provide login for java-client sessions and I use a lot of peer editing contexts for various actions that I currently invoke from the java client (prototype debugging via a button click right now but I will probably break them out into separate applications eventually that run from a CRON script. They are nightly transaction processing, etc.)

Here is what's bugging me. An editing context is part of a session. Many of Apple's diagrams indicate so clearly. I'm aware of the model/view/controller paradigm but I don't see any intrinsic reason the editing context shouldn't have a method to return the session object. What the heck am I missing?

I can certainly just do lock/unlock calls when I create the short-lived ECs and blow-off the MultiECLockManager but it seems like a neat approach would be to have MyEditingContext extend EOEditingContext such that when you create a new MyEditingContext it automatically registers itself with MultiECLockManager. Then have MyEditingContext.dispose() simply call the lock manager's unregister method. This would all be simple but I can't figure out how to get the session given only an EC.

- Kent
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