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[jira] [Created] (FLINK-9514) Create wrapper with TTL logic for value state


Andrey Zagrebin created FLINK-9514:
--------------------------------------

             Summary: Create wrapper with TTL logic for value state
                 Key: FLINK-9514
                 URL: https://issues.apache.org/jira/browse/FLINK-9514
             Project: Flink
          Issue Type: Sub-task
          Components: State Backends, Checkpointing
    Affects Versions: 1.6.0
            Reporter: Andrey Zagrebin
             Fix For: 1.6.0


TTL state decorator uses original state with packed TTL and add TTL logic using time provider:
{code:java}
TtlValueState<V> implements ValueState<V> {
  ValueState<TtlValue<V>> underlyingState;
  InternalTimeService timeProvider;
  V value() {
    TtlValue<V> valueWithTtl = underlyingState.get();
    // ttl logic here (e.g. update timestamp)
    return valueWithTtl.getValue();
  }
  void update() { ... underlyingState.update(valueWithTtl) ...  }
}
{code}
TTL decorators are apply to state produced by normal state binder in its TTL wrapper



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