Gyula Fora created FLINK-2983:
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Summary: Add StateLoader as an alternative to default KvState
Key: FLINK-2983
URL: https://issues.apache.org/jira/browse/FLINK-2983
Project: Flink
Issue Type: Improvement
Components: Streaming
Reporter: Gyula Fora
To create key-value states the user currently needs to specify a default state
value that will be returned on first access. Even though this support nulls for
implementing the initialization logic this is not a clean solution.
I propose to allow the user to pass a StateLoader instance which would load the
default state:
interface StateLoader<I, K,S>{
S loadState(K key, I currentInput);
}
The default value implementation could also use the state loader logic where
the stateloader would just return a copy of the given value on the loadState
call.
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