Package org.apache.flink.runtime.state

Interface Summary

Interface	Description
CheckpointListener	This interface must be implemented by functions/operations that want to receive a commit notification once a checkpoint has been completely acknowledged by all participants.
KvState<K,N,S extends org.apache.flink.api.common.state.State,SD extends org.apache.flink.api.common.state.StateDescriptor<S,?>,Backend extends AbstractStateBackend>	Key/Value state implementation for user-defined state.
KvStateSnapshot<K,N,S extends org.apache.flink.api.common.state.State,SD extends org.apache.flink.api.common.state.StateDescriptor<S,?>,Backend extends AbstractStateBackend>	This class represents a snapshot of the KvState, taken for a checkpoint.
StateBackendFactory<T extends AbstractStateBackend>	A factory to create a specific state backend.
StateHandle<T>	StateHandle is a general handle interface meant to abstract operator state fetching.
StateObject	Base of all types that represent checkpointed state.
StreamStateHandle	A state handle that produces an input stream when resolved.

Class Summary

Class	Description
AbstractCloseableHandle	A simple base for closable handles.
AbstractHeapState<K,N,SV,S extends org.apache.flink.api.common.state.State,SD extends org.apache.flink.api.common.state.StateDescriptor<S,?>,Backend extends AbstractStateBackend>	Base class for partitioned ListState implementations that are backed by a regular heap hash map.
AbstractStateBackend	A state backend defines how state is stored and snapshotted during checkpoints.
AbstractStateBackend.CheckpointStateOutputStream	A dedicated output stream that produces a StreamStateHandle when closed.
AbstractStateBackend.CheckpointStateOutputView	A dedicated DataOutputView stream that produces a StateHandle<DataInputView> when closed.
ArrayListSerializer<T>
AsynchronousKvStateSnapshot<K,N,S extends org.apache.flink.api.common.state.State,SD extends org.apache.flink.api.common.state.StateDescriptor<S,?>,Backend extends AbstractStateBackend>	KvStateSnapshot that asynchronously materializes the state that it represents.
AsynchronousStateHandle<T>	StateHandle that can asynchronously materialize the state that it represents.
GenericFoldingState<K,N,T,ACC,Backend extends AbstractStateBackend,W extends org.apache.flink.api.common.state.ValueState<ACC> & KvState<K,N,org.apache.flink.api.common.state.ValueState<ACC>,org.apache.flink.api.common.state.ValueStateDescriptor<ACC>,Backend>>	Generic implementation of FoldingState based on a wrapped ValueState.
GenericListState<K,N,T,Backend extends AbstractStateBackend,W extends org.apache.flink.api.common.state.ValueState<ArrayList<T>> & KvState<K,N,org.apache.flink.api.common.state.ValueState<ArrayList<T>>,org.apache.flink.api.common.state.ValueStateDescriptor<ArrayList<T>>,Backend>>	Generic implementation of ListState based on a wrapped ValueState.
GenericReducingState<K,N,T,Backend extends AbstractStateBackend,W extends org.apache.flink.api.common.state.ValueState<T> & KvState<K,N,org.apache.flink.api.common.state.ValueState<T>,org.apache.flink.api.common.state.ValueStateDescriptor<T>,Backend>>	Generic implementation of ReducingState based on a wrapped ValueState.
LocalStateHandle<T extends Serializable>	A StateHandle that includes the operator states directly.
SerializedCheckpointData	This class represents serialized checkpoint data for a collection of elements.
StateUtils	A collection of utility methods for dealing with operator state.