org.apache.flink.runtime.state.memory

类 PersistentMetadataCheckpointStorageLocation

java.lang.Object

org.apache.flink.runtime.state.memory.MemCheckpointStreamFactory

org.apache.flink.runtime.state.memory.PersistentMetadataCheckpointStorageLocation

所有已实现的接口:

CheckpointStorageLocation, CheckpointStreamFactory

public class PersistentMetadataCheckpointStorageLocation
extends MemCheckpointStreamFactory
implements CheckpointStorageLocation

A checkpoint storage location for the MemoryStateBackend when it durably persists the metadata in a file system.

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.runtime.state.memory.MemCheckpointStreamFactory

MemCheckpointStreamFactory.MemoryCheckpointOutputStream

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

CheckpointStreamFactory.CheckpointStateOutputStream

构造器概要

构造器

构造器和说明
PersistentMetadataCheckpointStorageLocation(org.apache.flink.core.fs.FileSystem fileSystem, org.apache.flink.core.fs.Path checkpointDir, int maxStateSize) Creates a checkpoint storage persists metadata to a file system and stores state in line in state handles with the metadata.

方法概要

限定符和类型	方法和说明
CheckpointMetadataOutputStream	createMetadataOutputStream() Creates the output stream to persist the checkpoint metadata to.
void	disposeOnFailure() Disposes the checkpoint location in case the checkpoint has failed.
CheckpointStorageLocationReference	getLocationReference() Gets a reference to the storage location.

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

createCheckpointStateOutputStream, toString

从类继承的方法 java.lang.Object

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

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

createCheckpointStateOutputStream

构造器详细资料

PersistentMetadataCheckpointStorageLocation

public PersistentMetadataCheckpointStorageLocation(org.apache.flink.core.fs.FileSystem fileSystem,
                                                   org.apache.flink.core.fs.Path checkpointDir,
                                                   int maxStateSize)

Creates a checkpoint storage persists metadata to a file system and stores state in line in state handles with the metadata.

参数:

fileSystem - The file system to which the metadata will be written.

checkpointDir - The directory where the checkpoint metadata will be written.

方法详细资料

createMetadataOutputStream

public CheckpointMetadataOutputStream createMetadataOutputStream()
                                                          throws IOException

从接口复制的说明: CheckpointStorageLocation

Creates the output stream to persist the checkpoint metadata to.

指定者:

createMetadataOutputStream 在接口中 CheckpointStorageLocation

返回:

The output stream to persist the checkpoint metadata to.

抛出:

IOException - Thrown, if the stream cannot be opened due to an I/O error.

disposeOnFailure

public void disposeOnFailure()
                      throws IOException

从接口复制的说明: CheckpointStorageLocation

Disposes the checkpoint location in case the checkpoint has failed. This method disposes all the data at that location, not just the data written by the particular node or process that calls this method.

指定者:

disposeOnFailure 在接口中 CheckpointStorageLocation

抛出:

IOException

getLocationReference

public CheckpointStorageLocationReference getLocationReference()

从接口复制的说明: CheckpointStorageLocation

Gets a reference to the storage location. This reference is sent to the target storage location via checkpoint RPC messages and checkpoint barriers, in a format avoiding backend-specific classes.

If there is no custom location information that needs to be communicated, this method can simply return CheckpointStorageLocationReference.getDefault().

指定者:

getLocationReference 在接口中 CheckpointStorageLocation