org.apache.flink.runtime.state

Class AbstractIncrementalStateHandle

java.lang.Object

org.apache.flink.runtime.state.AbstractIncrementalStateHandle

All Implemented Interfaces:

Serializable, CheckpointBoundKeyedStateHandle, CompositeStateHandle, IncrementalKeyedStateHandle, KeyedStateHandle, StateObject

Direct Known Subclasses:

IncrementalLocalKeyedStateHandle, IncrementalRemoteKeyedStateHandle

public abstract class AbstractIncrementalStateHandle
extends Object
implements IncrementalKeyedStateHandle

Abstract superclass for all IncrementalKeyedStateHandle.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.state.IncrementalKeyedStateHandle

IncrementalKeyedStateHandle.HandleAndLocalPath

Nested classes/interfaces inherited from interface org.apache.flink.runtime.state.StateObject

StateObject.StateObjectLocation, StateObject.StateObjectSizeStatsCollector

Field Summary

Fields

Modifier and Type	Field and Description
protected UUID	backendIdentifier UUID to identify the backend which created this state handle.
protected long	checkpointId The checkpoint Id.
protected KeyGroupRange	keyGroupRange The key-group range covered by this state handle.
protected StreamStateHandle	metaStateHandle Primary meta data state of the incremental checkpoint.
protected List<IncrementalKeyedStateHandle.HandleAndLocalPath>	sharedState Shared state in the incremental checkpoint.
protected StateHandleID	stateHandleId Unique id for this state handle.

Constructor Summary

Constructors

Constructor and Description
AbstractIncrementalStateHandle(UUID backendIdentifier, KeyGroupRange keyGroupRange, long checkpointId, List<IncrementalKeyedStateHandle.HandleAndLocalPath> sharedState, StreamStateHandle metaStateHandle, StateHandleID stateHandleId)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
UUID	getBackendIdentifier() Returns the identifier of the state backend from which this handle was created.
long	getCheckpointId() Returns the ID of the checkpoint for which the handle was created or used.
KeyedStateHandle	getIntersection(KeyGroupRange keyGroupRange) Returns a state over a range that is the intersection between this handle's key-group range and the provided key-group range.
KeyGroupRange	getKeyGroupRange() Returns the range of the key groups contained in the state.
StreamStateHandle	getMetaDataStateHandle()
List<IncrementalKeyedStateHandle.HandleAndLocalPath>	getSharedStateHandles() Returns a list of all shared states and the corresponding localPath in the backend at the time this was created.
StateHandleID	getStateHandleId() Returns a unique state handle id to distinguish with other keyed state handles.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.runtime.state.CheckpointBoundKeyedStateHandle

rebound

Methods inherited from interface org.apache.flink.runtime.state.CompositeStateHandle

getCheckpointedSize, registerSharedStates

Methods inherited from interface org.apache.flink.runtime.state.StateObject

collectSizeStats, discardState, getStateSize

Field Detail

checkpointId

protected final long checkpointId

The checkpoint Id.

backendIdentifier

protected final UUID backendIdentifier

UUID to identify the backend which created this state handle. This is in creating the key for the SharedStateRegistry.

keyGroupRange

protected final KeyGroupRange keyGroupRange

The key-group range covered by this state handle.

sharedState

protected final List<IncrementalKeyedStateHandle.HandleAndLocalPath> sharedState

Shared state in the incremental checkpoint.

metaStateHandle

protected final StreamStateHandle metaStateHandle

Primary meta data state of the incremental checkpoint.

stateHandleId

protected final StateHandleID stateHandleId

Unique id for this state handle.

Constructor Detail

AbstractIncrementalStateHandle

public AbstractIncrementalStateHandle(UUID backendIdentifier,
                                      KeyGroupRange keyGroupRange,
                                      long checkpointId,
                                      List<IncrementalKeyedStateHandle.HandleAndLocalPath> sharedState,
                                      StreamStateHandle metaStateHandle,
                                      StateHandleID stateHandleId)

Method Detail

getCheckpointId

public long getCheckpointId()

Description copied from interface: CheckpointBoundKeyedStateHandle

Returns the ID of the checkpoint for which the handle was created or used.

Specified by:

getCheckpointId in interface CheckpointBoundKeyedStateHandle

getBackendIdentifier

@Nonnull
public UUID getBackendIdentifier()

Description copied from interface: IncrementalKeyedStateHandle

Returns the identifier of the state backend from which this handle was created.

Specified by:

getBackendIdentifier in interface IncrementalKeyedStateHandle

getKeyGroupRange

public KeyGroupRange getKeyGroupRange()

Description copied from interface: KeyedStateHandle

Returns the range of the key groups contained in the state.

Specified by:

getKeyGroupRange in interface KeyedStateHandle

getSharedStateHandles

@Nonnull
public List<IncrementalKeyedStateHandle.HandleAndLocalPath> getSharedStateHandles()

Description copied from interface: IncrementalKeyedStateHandle

Returns a list of all shared states and the corresponding localPath in the backend at the time this was created.

Specified by:

getSharedStateHandles in interface IncrementalKeyedStateHandle

getMetaDataStateHandle

@Nonnull
public StreamStateHandle getMetaDataStateHandle()

Specified by:

getMetaDataStateHandle in interface IncrementalKeyedStateHandle

getStateHandleId

public StateHandleID getStateHandleId()

Description copied from interface: KeyedStateHandle

Returns a unique state handle id to distinguish with other keyed state handles.

If this state handle would be used as materialized part of ChangelogStateBackendHandle, it should persist this state handle id when serializing of checkpoint and deserialize it back to ensure the state handle id is constant.

Specified by:

getStateHandleId in interface KeyedStateHandle

Returns:

A unique state handle id.

getIntersection

public KeyedStateHandle getIntersection(KeyGroupRange keyGroupRange)

Description copied from interface: KeyedStateHandle

Returns a state over a range that is the intersection between this handle's key-group range and the provided key-group range.

Specified by:

getIntersection in interface KeyedStateHandle

Parameters:

keyGroupRange - The key group range to intersect with, will return null if the intersection of this handle's key-group and the provided key-group is empty.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object