org.apache.flink.runtime.state

接口 CheckpointStreamFactory

所有已知子接口:

CheckpointStorageLocation

所有已知实现类:

FsCheckpointStorageLocation, FsCheckpointStreamFactory, MemCheckpointStreamFactory, NonPersistentMetadataCheckpointStorageLocation, PersistentMetadataCheckpointStorageLocation

public interface CheckpointStreamFactory

A factory for checkpoint output streams, which are used to persist data for checkpoints.

Stream factories can be created from the CheckpointStorageAccess through CheckpointStorageWorkerView.resolveCheckpointStorageLocation(long, CheckpointStorageLocationReference).

嵌套类概要

嵌套类

限定符和类型	接口和说明
static class	CheckpointStreamFactory.CheckpointStateOutputStream A dedicated output stream that produces a StreamStateHandle when closed.

方法概要

限定符和类型	方法和说明
CheckpointStreamFactory.CheckpointStateOutputStream	createCheckpointStateOutputStream(CheckpointedStateScope scope) Creates an new CheckpointStreamFactory.CheckpointStateOutputStream.

方法详细资料

createCheckpointStateOutputStream

CheckpointStreamFactory.CheckpointStateOutputStream createCheckpointStateOutputStream(CheckpointedStateScope scope)
                                                                               throws IOException

Creates an new CheckpointStreamFactory.CheckpointStateOutputStream. When the stream is closed, it returns a state handle that can retrieve the state back.

参数:

scope - The state's scope, whether it is exclusive or shared.

返回:

An output stream that writes state for the given checkpoint.

抛出:

IOException - Exceptions may occur while creating the stream and should be forwarded.