On Fri, 23 Jan 2004 11:54:38 -0500 Shane Landrum <srl@boston.com> wrote:
Where can I read about writing my own conflict resolution? What risks are there with this approach, and how do I minimize them?
The subject isn't well-documented. I hope we'll improve the documentation for 3.3, and this is one of the issues the bears explaning. In the interim, here are two possibilities. Jim's wiki has a page that describes the basic API. It's all correct and has some simple example code. http://www.zope.org/Members/jim/ZODB/ApplicationLevelConflictResolution I think it doesn't address cross-object consistency issues. If you have two (or more) objects and there is an invariant that spans those two objects, you need to be very careful about maintaining that invariant in the face of conflict resolution. BTrees have to deal with that. I also wrote a technical note in my weblog about avoiding contention. It discusses several approaches, but it's just a sketch of some ideas. http://www.python.org/~jeremy/weblog/031031c.html If these don't answer your questions or provoke new questions, feel free to ask. It will help us understand what new documentation is needed. Jeremy