Package org.apache.flink.runtime.state

Interface Summary

Interface	Description
KvState<K,V,Backend extends StateBackend<Backend>>	Key/Value state implementation for user-defined state.
KvStateSnapshot<K,V,Backend extends StateBackend<Backend>>	This class represents a snapshot of the KvState, taken for a checkpoint.
StateBackendFactory<T extends StateBackend<T>>	A factory to create a specific state backend.
StateHandle<T>	StateHandle is a general handle interface meant to abstract operator state fetching.
StreamStateHandle	A state handle that produces an input stream when resolved.

Class Summary

Class	Description
AbstractHeapKvState<K,V,Backend extends StateBackend<Backend>>	Base class for key/value state implementations that are backed by a regular heap hash map.
LocalStateHandle<T extends Serializable>	A StateHandle that includes the operator states directly.
SerializedCheckpointData	This class represents serialized checkpoint data for a collection of elements.
StateBackend<Backend extends StateBackend<Backend>>	A state backend defines how state is stored and snapshotted during checkpoints.
StateBackend.CheckpointStateOutputStream	A dedicated output stream that produces a StreamStateHandle when closed.
StateBackend.CheckpointStateOutputView	A dedicated DataOutputView stream that produces a StateHandle<DataInputView> when closed.
StateUtils	A collection of utility methods for dealing with operator state.