org.apache.flink.runtime.state.heap

Class CopyOnWriteStateTable<K,N,S>

java.lang.Object

org.apache.flink.runtime.state.heap.StateTable<K,N,S>

org.apache.flink.runtime.state.heap.CopyOnWriteStateTable<K,N,S>

Type Parameters:

K - type of key.

N - type of namespace.

S - type of state.

All Implemented Interfaces:

Iterable<StateEntry<K,N,S>>, StateSnapshotRestore

public class CopyOnWriteStateTable<K,N,S>
extends StateTable<K,N,S>

This implementation of StateTable uses CopyOnWriteStateMap. This implementation supports asynchronous snapshots.

Field Summary

Fields inherited from class org.apache.flink.runtime.state.heap.StateTable

keyContext, keyGroupedStateMaps, keyGroupRange, keySerializer, metaInfo

Method Summary

Modifier and Type	Method and Description
protected CopyOnWriteStateMap<K,N,S>	createStateMap()
void	setMetaInfo(RegisteredKeyValueStateBackendMetaInfo<N,S> metaInfo)
CopyOnWriteStateTableSnapshot<K,N,S>	stateSnapshot() Creates a snapshot of this CopyOnWriteStateTable, to be written in checkpointing.

Methods inherited from class org.apache.flink.runtime.state.heap.StateTable

containsKey, get, get, getKeyGroupOffset, getKeys, getKeysAndNamespaces, getKeySerializer, getMapForKeyGroup, getMetaInfo, getNamespaceSerializer, getState, getStateIncrementalVisitor, getStateSerializer, isEmpty, iterator, keyGroupReader, put, put, remove, removeAndGetOld, size, sizeOfNamespace, transform

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

createStateMap

protected CopyOnWriteStateMap<K,N,S> createStateMap()

Specified by:

createStateMap in class StateTable<K,N,S>

setMetaInfo

public void setMetaInfo(RegisteredKeyValueStateBackendMetaInfo<N,S> metaInfo)

Overrides:

setMetaInfo in class StateTable<K,N,S>

stateSnapshot

@Nonnull
public CopyOnWriteStateTableSnapshot<K,N,S> stateSnapshot()

Creates a snapshot of this CopyOnWriteStateTable, to be written in checkpointing.

Specified by:

stateSnapshot in interface StateSnapshotRestore

Specified by:

stateSnapshot in class StateTable<K,N,S>

Returns:

a snapshot from this CopyOnWriteStateTable, for checkpointing.