org.apache.flink.runtime.state

类 IncrementalLocalKeyedStateHandle

java.lang.Object

org.apache.flink.runtime.state.DirectoryKeyedStateHandle

org.apache.flink.runtime.state.IncrementalLocalKeyedStateHandle

所有已实现的接口:

Serializable, CheckpointBoundKeyedStateHandle, CompositeStateHandle, IncrementalKeyedStateHandle, KeyedStateHandle, StateObject

public class IncrementalLocalKeyedStateHandle
extends DirectoryKeyedStateHandle
implements IncrementalKeyedStateHandle

State handle for local copies of IncrementalRemoteKeyedStateHandle. Consists of a DirectoryStateHandle that represents the directory of the native RocksDB snapshot, the key groups, and a stream state handle for Flink's state meta data file.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
IncrementalLocalKeyedStateHandle(UUID backendIdentifier, long checkpointId, DirectoryStateHandle directoryStateHandle, KeyGroupRange keyGroupRange, StreamStateHandle metaDataState, Map<StateHandleID,StreamStateHandle> sharedStateHandleIDs)

方法概要

限定符和类型	方法和说明
void	discardState() Discards the state referred to and solemnly owned by this handle, to free up resources in the persistent storage.
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.
StreamStateHandle	getMetaDataState()
Map<StateHandleID,StreamStateHandle>	getSharedStateHandles() Returns a set of ids of all registered shared states in the backend at the time this was created.
long	getStateSize() Returns the size of the state in bytes.
int	hashCode()
CheckpointBoundKeyedStateHandle	rebound(long checkpointId) Returns a new CheckpointBoundKeyedStateHandle Rebounding checkpoint id to a specific checkpoint id.
String	toString()

从类继承的方法 org.apache.flink.runtime.state.DirectoryKeyedStateHandle

getCheckpointedSize, getDirectoryStateHandle, getIntersection, getKeyGroupRange, getStateHandleId, registerSharedStates

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.runtime.state.KeyedStateHandle

getIntersection, getKeyGroupRange, getStateHandleId

从接口继承的方法 org.apache.flink.runtime.state.CompositeStateHandle

getCheckpointedSize, registerSharedStates

构造器详细资料

IncrementalLocalKeyedStateHandle

public IncrementalLocalKeyedStateHandle(@Nonnull
                                        UUID backendIdentifier,
                                        @Nonnegative
                                        long checkpointId,
                                        @Nonnull
                                        DirectoryStateHandle directoryStateHandle,
                                        @Nonnull
                                        KeyGroupRange keyGroupRange,
                                        @Nonnull
                                        StreamStateHandle metaDataState,
                                        @Nonnull
                                        Map<StateHandleID,StreamStateHandle> sharedStateHandleIDs)

方法详细资料

getMetaDataState

@Nonnull
public StreamStateHandle getMetaDataState()

getCheckpointId

public long getCheckpointId()

从接口复制的说明: CheckpointBoundKeyedStateHandle

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

指定者:

getCheckpointId 在接口中 CheckpointBoundKeyedStateHandle

rebound

public CheckpointBoundKeyedStateHandle rebound(long checkpointId)

从接口复制的说明: CheckpointBoundKeyedStateHandle

Returns a new CheckpointBoundKeyedStateHandle Rebounding checkpoint id to a specific checkpoint id.

指定者:

rebound 在接口中 CheckpointBoundKeyedStateHandle

参数:

checkpointId - rebounded checkpoint id.

getBackendIdentifier

@Nonnull
public UUID getBackendIdentifier()

从接口复制的说明: IncrementalKeyedStateHandle

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

指定者:

getBackendIdentifier 在接口中 IncrementalKeyedStateHandle

getSharedStateHandles

@Nonnull
public Map<StateHandleID,StreamStateHandle> getSharedStateHandles()

从接口复制的说明: IncrementalKeyedStateHandle

Returns a set of ids of all registered shared states in the backend at the time this was created.

指定者:

getSharedStateHandles 在接口中 IncrementalKeyedStateHandle

equals

public boolean equals(Object o)

覆盖:

equals 在类中 DirectoryKeyedStateHandle

discardState

public void discardState()
                  throws Exception

从接口复制的说明: StateObject

Discards the state referred to and solemnly owned by this handle, to free up resources in the persistent storage. This method is called when the state represented by this object will not be used any more.

指定者:

discardState 在接口中 StateObject

覆盖:

discardState 在类中 DirectoryKeyedStateHandle

抛出:

Exception

getStateSize

public long getStateSize()

从接口复制的说明: StateObject

Returns the size of the state in bytes. If the size is not known, this method should return 0.

The values produced by this method are only used for informational purposes and for metrics/monitoring. If this method returns wrong values, the checkpoints and recovery will still behave correctly. However, efficiency may be impacted (wrong space pre-allocation) and functionality that depends on metrics (like monitoring) will be impacted.

Note for implementors: This method should not perform any I/O operations while obtaining the state size (hence it does not declare throwing an IOException). Instead, the state size should be stored in the state object, or should be computable from the state stored in this object. The reason is that this method is called frequently by several parts of the checkpointing and issuing I/O requests from this method accumulates a heavy I/O load on the storage system at higher scale.

指定者:

getStateSize 在接口中 StateObject

覆盖:

getStateSize 在类中 DirectoryKeyedStateHandle

返回:

Size of the state in bytes.

hashCode

public int hashCode()

覆盖:

hashCode 在类中 DirectoryKeyedStateHandle

toString

public String toString()

覆盖:

toString 在类中 DirectoryKeyedStateHandle