Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/9186#issuecomment-155586759
> @zsxwing Since JavaStreamingListener is an actual class and not an
interface, I can't use "implements" in py4j. How should I work around this?
Should I change JavaStreamingListener from a class to a trait?
`JavaStreamingListener` is a class to make sure we don't forget to add new
APIs to it when adding anything to `StreamingListener`. Could you add a Python
class and delegate all invokings to `JavaStreamingListener`?
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