Zakelly Lan created FLINK-35972:
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Summary: Directly specify key and process runnable in async state
execution model
Key: FLINK-35972
URL: https://issues.apache.org/jira/browse/FLINK-35972
Project: Flink
Issue Type: Sub-task
Reporter: Zakelly Lan
Assignee: Zakelly Lan
In asynchronous execution model (FLIP-425) for state, the key is managed by the
framework and automatically assigned before {{processElement}} or callback
running. However in some cases, there should be an internal interface that
allows to switch key and start a new process with this key. It is useful when
implementing something like mini-batch, which triggers a batch of real logic
for gathered elements at one time instead of the {{processElement}} for each
element.
Additionally, the processing invoked by this interface should have a higher
priority than the normal input, as the semantics of this processing method is
to continue processing the previously half-processed data.
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