Github user dragonsinth commented on the pull request:
https://github.com/apache/curator/pull/42#issuecomment-59829735
I'm inclined to want to go with what we have and reserve Predicate as a
future feature. I don't think anything here so far would make it harder /
preclude adding it later.
I have 2 main concerns over adding general Predicates that make me want to
consider this much more carefully.
1) Running the predicate means passing control to user code on cache's
event callback / mutation threads.
2) An inconsistent predicate would be super weird and possibly corrupt
internal state. What would happen if a predicate's behavior changed on the
fly, or gave inconsistent answers for the same node?
The idea definitely has merit I'm just not really ready to take it on right
now.
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