Sorry if I wasn't clear -- I wasn't suggesting that what you've proposed would be made better using the module. Just that if you ever decided to expand it (which often happens IME) it might be useful to look into further decoupling the transactionable (is that a word?) resources from the action doing the commit/rollback.
I don't think the Observer/Observable pattern is too advanced for common use. In fact I think it's one of the simplest (and quickest) ways you can achieve decoupling among disparate processes. Maybe the documentation for Class::Observable is a little too long, but that often happens with simple, flexible little tools that can be used in lots of different ways.
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