Package org.apache.flink.api.common.state

Interface Summary

Interface	Description
AggregatingState<IN,OUT>	State interface for aggregating state, based on an AggregateFunction.
AppendingState<IN,OUT>	Base interface for partitioned state that supports adding elements and inspecting the current state.
FoldingState<T,ACC>	Deprecated will be removed in a future version in favor of AggregatingState
KeyedStateStore	This interface contains methods for registering keyed state with a managed store.
ListState<T>	State interface for partitioned list state in Operations.
MapState<UK,UV>	State interface for partitioned key-value state.
MergingState<IN,OUT>	Extension of AppendingState that allows merging of state.
OperatorStateStore	This interface contains methods for registering operator state with a managed store.
ReducingState<T>	State interface for reducing state.
State	Interface that different types of partitioned state must implement.
StateBinder	The StateBinder is used by StateDescriptor instances to create actual State objects.
ValueState<T>	State interface for partitioned single-value state.

Class Summary

Class	Description
AggregatingStateDescriptor<IN,ACC,OUT>	A StateDescriptor for AggregatingState.
FoldingStateDescriptor<T,ACC>	Deprecated will be removed in a future version in favor of AggregatingStateDescriptor
ListStateDescriptor<T>	A StateDescriptor for ListState.
MapStateDescriptor<UK,UV>	A StateDescriptor for MapState.
ReducingStateDescriptor<T>	StateDescriptor for ReducingState.
StateDescriptor<S extends State,T>	Base class for state descriptors.
ValueStateDescriptor<T>	StateDescriptor for ValueState.

Enum Summary

Enum	Description
StateDescriptor.Type	An enumeration of the types of supported states.