NealSun96 commented on issue #682: Implement sharding key trie node class URL: https://github.com/apache/helix/pull/682#issuecomment-579456336 Replying to both comments from @jiajunwang and @narendly here, as both comments revolve around `getZkRealmAddress()`. I agree that `getZkRealmAddress()` should not be used for non-leaf nodes. As of right now, I have added the exception throwing behavior per @narendly 's suggestion, however, at this moment I do not agree with this approach. Throwing an exception implies that `getZkRealmAddress()` should not be called under certain conditions, and that `zkRealmAddress` should not exist under these conditions; it is a better practice to ensure that such a function is unavailable in the first place (under these conditions), and that the object is always in a valid state. I believe @jiajunwang 's proposed design is one of the only ways to achieve this, but it'll be a complete redo on the current design. Per @narendly 's suggestions, I purpose to move on with the current design for now, and revisit this class as more usage to this class is consolidated. With more usage, we will have a better context on how the class should behave, which can help making a decision. This class has been stalling the progress on other components for longer than planned, which we should avoid.
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