xushiyan commented on issue #1440: [HUDI-731] Add ChainedTransformer URL: https://github.com/apache/incubator-hudi/pull/1440#issuecomment-603012975 @vinothchandar The current approach is also compatible with existing CLI usage. The user extends this abstract class and plugs that custom class to `--transformer-class` param. So the difference is: transformer list is supplied from user's code instead of being parsed from CLI args. My reasoning for this implementation is: it saves some parsing logic to maintain and users could have more flexibility in how they supply transformers (via their own code). Though saying that, I don't mind making the transformers parsed from CLI. It's kinda user experience trade-off.
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