org.apache.flink.runtime.state.filesystem

Class FsCheckpointStateToolset

java.lang.Object

org.apache.flink.runtime.state.filesystem.FsCheckpointStateToolset

All Implemented Interfaces:

CheckpointStateToolset

public class FsCheckpointStateToolset
extends Object
implements CheckpointStateToolset

An implementation of CheckpointStateToolset that does file based duplicating with as DuplicatingFileSystem.

Constructor Summary

Constructors

Constructor and Description
FsCheckpointStateToolset(org.apache.flink.core.fs.Path basePath, org.apache.flink.core.fs.DuplicatingFileSystem fs)

Method Summary

Modifier and Type	Method and Description
boolean	canFastDuplicate(StreamStateHandle stateHandle) Tells if we can duplicate the given StreamStateHandle.
List<StreamStateHandle>	duplicate(List<StreamStateHandle> stateHandles) Duplicates StreamStateHandles into the path embedded inside of the class.

Methods inherited from class java.lang.Object

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

Constructor Detail

FsCheckpointStateToolset

public FsCheckpointStateToolset(org.apache.flink.core.fs.Path basePath,
                                org.apache.flink.core.fs.DuplicatingFileSystem fs)

Method Detail

canFastDuplicate

public boolean canFastDuplicate(StreamStateHandle stateHandle)
                         throws IOException

Description copied from interface: CheckpointStateToolset

Tells if we can duplicate the given StreamStateHandle.

This should be a rather cheap operation, preferably not involving any remote accesses.

Specified by:

canFastDuplicate in interface CheckpointStateToolset

Parameters:

stateHandle - The handle to duplicate

Returns:

true, if we can perform the duplication

Throws:

IOException

duplicate

public List<StreamStateHandle> duplicate(List<StreamStateHandle> stateHandles)
                                  throws IOException

Description copied from interface: CheckpointStateToolset

Duplicates StreamStateHandles into the path embedded inside of the class.

You should first check if you can duplicate with CheckpointStateToolset.canFastDuplicate(StreamStateHandle).

Specified by:

duplicate in interface CheckpointStateToolset

Parameters:

stateHandles - The handles to duplicate

Returns:

The duplicated handles

Throws:

IOException