org.apache.flink.runtime.state.filemerging

类 FileMergingOperatorStreamStateHandle

java.lang.Object

org.apache.flink.runtime.state.OperatorStreamStateHandle

org.apache.flink.runtime.state.filemerging.FileMergingOperatorStreamStateHandle

所有已实现的接口:

Serializable, CompositeStateHandle, OperatorStateHandle, StateObject, StreamStateHandle

直接已知子类:

EmptyFileMergingOperatorStreamStateHandle

public class FileMergingOperatorStreamStateHandle
extends OperatorStreamStateHandle
implements CompositeStateHandle

A OperatorStreamStateHandle that works for file merging checkpoints.

Operator states are stored in `taskownd/` dir when file merging is enabled. When an operator state dir is not referenced by any checkpoint, SharedStateRegistry will discard it. The shared subtask dir of fire merging is also tracked by FileMergingOperatorStreamStateHandle.

The shared subtask dir of file merging is created when task initialization, which will be discarded when no checkpoint refer to it.

另请参阅:

序列化表格

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.runtime.state.StateObject

StateObject.StateObjectLocation, StateObject.StateObjectSizeStatsCollector

从接口继承的嵌套类/接口 org.apache.flink.runtime.state.OperatorStateHandle

OperatorStateHandle.Mode, OperatorStateHandle.StateMetaInfo

构造器概要

构造器

构造器和说明
FileMergingOperatorStreamStateHandle(DirectoryStreamStateHandle taskOwnedDirHandle, DirectoryStreamStateHandle sharedDirHandle, Map<String,OperatorStateHandle.StateMetaInfo> stateNameToPartitionOffsets, StreamStateHandle delegateStateHandle)

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)
long	getCheckpointedSize() Returns the persisted data size during checkpoint execution in bytes.
DirectoryStreamStateHandle	getSharedDirHandle()
DirectoryStreamStateHandle	getTaskOwnedDirHandle()
int	hashCode()
void	registerSharedStates(SharedStateRegistry stateRegistry, long checkpointId) Register both newly created and already referenced shared states in the given SharedStateRegistry.
String	toString()

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

asBytesIfInMemory, collectSizeStats, getDelegateStateHandle, getStateNameToPartitionOffsets, getStateSize, getStreamStateHandleID, openInputStream

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.StateObject

collectSizeStats, getStateSize

构造器详细资料

FileMergingOperatorStreamStateHandle

public FileMergingOperatorStreamStateHandle(DirectoryStreamStateHandle taskOwnedDirHandle,
                                            DirectoryStreamStateHandle sharedDirHandle,
                                            Map<String,OperatorStateHandle.StateMetaInfo> stateNameToPartitionOffsets,
                                            StreamStateHandle delegateStateHandle)

方法详细资料

registerSharedStates

public void registerSharedStates(SharedStateRegistry stateRegistry,
                                 long checkpointId)

从接口复制的说明: CompositeStateHandle

Register both newly created and already referenced shared states in the given SharedStateRegistry. This method is called when the checkpoint successfully completes or is recovered from failures.

After this is completed, newly created shared state is considered as published is no longer owned by this handle. This means that it should no longer be deleted as part of calls to StateObject.discardState(). Instead, StateObject.discardState() will trigger an unregistration from the registry.

指定者:

registerSharedStates 在接口中 CompositeStateHandle

参数:

stateRegistry - The registry where shared states are registered.

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 anymore.

指定者:

discardState 在接口中 StateObject

覆盖:

discardState 在类中 OperatorStreamStateHandle

抛出:

Exception

getCheckpointedSize

public long getCheckpointedSize()

从接口复制的说明: CompositeStateHandle

Returns the persisted data size during checkpoint execution in bytes. If incremental checkpoint is enabled, this value represents the incremental persisted data size, and usually smaller than StateObject.getStateSize(). If the size is unknown, this method would return same result as StateObject.getStateSize().

指定者:

getCheckpointedSize 在接口中 CompositeStateHandle

返回:

The persisted data size during checkpoint execution in bytes.

getSharedDirHandle

public DirectoryStreamStateHandle getSharedDirHandle()

getTaskOwnedDirHandle

public DirectoryStreamStateHandle getTaskOwnedDirHandle()

equals

public boolean equals(Object o)

覆盖:

equals 在类中 OperatorStreamStateHandle

hashCode

public int hashCode()

覆盖:

hashCode 在类中 OperatorStreamStateHandle

toString

public String toString()

覆盖:

toString 在类中 OperatorStreamStateHandle