> I would like to avoid storing messages sent by users to the chat room > object, as this easily leads to ZODB conflicts. But I need a thread-safe > way to store this messages.
As what type of object do you plan to store messages? Archetypes-based objects or more lightweight?
AT objects are just too heavy and all the catalogueing will cause write conflicts and grind your site to a halt, since messages come in at a high rate.
Lightweight objects can help a lot, especially if your container is just a BTreeFolder which does not need to reindex when its contents are changed.
I know I'm not answering your question, I'm just suggesting possibly easier alternatives.
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