[jira] [Created] (FLINK-17644) Add support for state TTL.

[Shang Yuanchun (Jira)]

Igal Shilman created FLINK-17644:
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             Summary: Add support for state TTL.
                 Key: FLINK-17644
                 URL: https://issues.apache.org/jira/browse/FLINK-17644
             Project: Flink
          Issue Type: Improvement
          Components: Stateful Functions
            Reporter: Igal Shilman


The DataStream API supports[state TTL|[https://ci.apache.org/projects/flink/flink-docs-stable/dev/stream/state/state.html#state-time-to-live-ttl]], and it can be made accessible to stateful functions users.

To facilitate uses cases as described in [http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Window-processing-in-Stateful-Functions-td34966.html]

 

The proposed approach would extend the PersistedValue, PersistedTable and PersistedBuffer

with another constructor that accepts ExpireAfter object

which has:
 * java time duration
 * refresh on read (boolean)

(we should never return an expired entry)

In addition, we need to extend the remote function state to support state expiration. 

 



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