Rajat Khandelwal created LENS-935:
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Summary: Add driver query acceptor
Key: LENS-935
URL: https://issues.apache.org/jira/browse/LENS-935
Project: Apache Lens
Issue Type: New Feature
Reporter: Rajat Khandelwal
Assignee: Rajat Khandelwal
After rewrite, the selection of driver is done just once. I propose the
following:
* Each driver has a list of acceptors
* Once a driver is selected, it's asked "do you accept this query", which it
answers using its acceptors
* If the driver accepts, the flow after that is unchanged
* If the driver rejects, that driver is removed from candidates, and selection
happens again. Then the flow goes back to point 2.
* If all reject, first driver's error is propagated.
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