erenavsarogullari opened a new pull request #3112: [Java Streamlet API] Support abstractions on Streamlet Operators URL: https://github.com/apache/incubator-heron/pull/3112 This PR aims to increase abstraction scope for Streamlet Operators `prepare` function can be moved to `abstract StreamletOperator` and `abstract StreamletWindowOperator` classes so their sub-classes(a.k.a `Operators`) can extend it. This save us from code duplication. Also, if an operator needs, it can still override for custom logic(e.g: `TransformOperator`).
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