State (Flink : 2.0-SNAPSHOT API)

All Known Subinterfaces:

AggregatingState<IN,OUT>, AppendingState<IN,OUT,SYNCOUT>, InternalAggregatingState<K,N,IN,ACC,OUT>, InternalAppendingState<K,N,IN,SV,OUT,SYNCOUT>, InternalKeyedState<K,N,V>, InternalListState<K,N,V>, InternalMapState<K,N,UK,UV>, InternalMergingState<K,N,IN,SV,OUT,SYNCOUT>, InternalReducingState<K,N,T>, InternalValueState<K,N,V>, ListState<T>, MapState<UK,UV>, MergingState<IN,OUT,SYNCOUT>, ReducingState<T>, ValueState<T>

All Known Implementing Classes:

AbstractAggregatingState, AbstractKeyedState, AbstractListState, AbstractMapState, AbstractReducingState, AbstractValueState, AggregatingStateAdaptor, ForStAggregatingState, ForStListState, ForStMapState, ForStReducingState, ForStValueState, ListStateAdaptor, MapStateAdaptor, MergingStateAdaptor, ReducingStateAdaptor, StateAdaptor, ValueStateAdaptor
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@Experimental
public interface State
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Interface that different types of partitioned state must implement.
The state is only accessible by functions applied on a KeyedStream. The key is automatically supplied by the system, so the function always sees the value mapped to the key of the current element. That way, the system can handle stream and state partitioning consistently together.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`StateFuture<Void>`	`asyncClear()`	Removes the value mapped under the current key asynchronously.
`void`	`clear()`	Removes the value mapped under the current key.

- Method Detail
  - asyncClear
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StateFuture<Void> asyncClear()
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    Removes the value mapped under the current key asynchronously.
  - clear
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void clear()
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    Removes the value mapped under the current key.