org.apache.flink.state.changelog

Class ChangelogStateFactory

java.lang.Object

org.apache.flink.state.changelog.ChangelogStateFactory

public class ChangelogStateFactory
extends Object

Maintains the lifecycle of all ChangelogStates.

Constructor Summary

Constructors

Constructor and Description
ChangelogStateFactory()

Method Summary

Modifier and Type	Method and Description
<K,N,V,S extends State> ChangelogState	create(StateDescriptor<S,V> stateDescriptor, InternalKvState<K,N,V> internalKvState, KvStateChangeLogger<V,N> kvStateChangeLogger, InternalKeyContext<K> keyContext)
<T> ChangelogKeyGroupedPriorityQueue<T>	create(String stateName, KeyGroupedInternalPriorityQueue<T> internalPriorityQueue, StateChangeLogger<T,Void> logger, TypeSerializer<T> serializer)
void	dispose()
ChangelogState	getExistingState(String name, StateMetaInfoSnapshot.BackendStateType type)
void	resetAllWritingMetaFlags()

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangelogStateFactory

public ChangelogStateFactory()

Method Detail

create

public <K,N,V,S extends State> ChangelogState create(StateDescriptor<S,V> stateDescriptor,
                                                     InternalKvState<K,N,V> internalKvState,
                                                     KvStateChangeLogger<V,N> kvStateChangeLogger,
                                                     InternalKeyContext<K> keyContext)
                                              throws Exception

Throws:

Exception

create

public <T> ChangelogKeyGroupedPriorityQueue<T> create(String stateName,
                                                      KeyGroupedInternalPriorityQueue<T> internalPriorityQueue,
                                                      StateChangeLogger<T,Void> logger,
                                                      TypeSerializer<T> serializer)

getExistingState

public ChangelogState getExistingState(String name,
                                       StateMetaInfoSnapshot.BackendStateType type)
                                throws UnsupportedOperationException

Parameters:

name - state name

type - state type (the only supported type currently are: key value, priority queue)

Returns:

an existing state, i.e. the one that was already created. The returned state will not apply TTL to the passed values, regardless of the TTL settings. This prevents double applying of TTL (recovered values are TTL values if TTL was enabled). The state will, however, use TTL serializer if TTL is enabled. WARN: only valid during the recovery.

Throws:

UnsupportedOperationException - if state type is not supported

resetAllWritingMetaFlags

public void resetAllWritingMetaFlags()

dispose

public void dispose()