Siyuan Hua created APEXMALHAR-2165:
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Summary: Implement a useful default Partitioner and/or Unifier for
Keyed Windowed Operator
Key: APEXMALHAR-2165
URL: https://issues.apache.org/jira/browse/APEXMALHAR-2165
Project: Apache Apex Malhar
Issue Type: Improvement
Reporter: Siyuan Hua
Based on first discussion, we can have some default partitioner to partition
KeyedWindowedOperator into different instance and the possible Unifier to unify
the result together.
For a non-keyed windowed operator, on the high-level API level, we can
translate transform to 2 operators one KeyedWindowedOperator with a specified
PartitionKey(not logically partition key) connect with another WindowedOperator
which do final accumulation. This will be tracked in another ticket
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