We could have an event for it, and register some custom strategy.

I'm thinking about two initial trivial ones:

log & ignore
throw exception

but maybe we'll be able to add smarter ones to generate compensating operations & such.
The DataStore could be the factory, so to have a default strategy per NoSQL?

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira