org.apache.flink.runtime.state

类 CheckpointMetadataOutputStream

java.lang.Object

java.io.OutputStream

org.apache.flink.core.fs.FSDataOutputStream

org.apache.flink.runtime.state.CheckpointMetadataOutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable

直接已知子类:

FsCheckpointMetadataOutputStream

public abstract class CheckpointMetadataOutputStream
extends org.apache.flink.core.fs.FSDataOutputStream

An output stream for checkpoint metadata.

This stream is similar to the CheckpointStreamFactory.CheckpointStateOutputStream, but for metadata files rather thancdata files.

This stream always creates a file, regardless of the amount of data written.

构造器概要

构造器

构造器和说明
CheckpointMetadataOutputStream()

方法概要

限定符和类型	方法和说明
abstract void	close() This method should close the stream, if has not been closed before.
abstract CompletedCheckpointStorageLocation	closeAndFinalizeCheckpoint() Closes the stream after all metadata was written and finalizes the checkpoint location.

从类继承的方法 org.apache.flink.core.fs.FSDataOutputStream

flush, getPos, sync

从类继承的方法 java.io.OutputStream

write, write, write

从类继承的方法 java.lang.Object

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

构造器详细资料

CheckpointMetadataOutputStream

public CheckpointMetadataOutputStream()

方法详细资料

closeAndFinalizeCheckpoint

public abstract CompletedCheckpointStorageLocation closeAndFinalizeCheckpoint()
                                                                       throws IOException

Closes the stream after all metadata was written and finalizes the checkpoint location.

返回:

An object representing a finalized checkpoint storage location.

抛出:

IOException - Thrown, if the stream cannot be closed or the finalization fails.

close

public abstract void close()
                    throws IOException

This method should close the stream, if has not been closed before. If this method actually closes the stream, it should delete/release the resource behind the stream, such as the file that the stream writes to.

The above implies that this method is intended to be the "unsuccessful close", such as when cancelling the stream writing, or when an exception occurs. Closing the stream for the successful case must go through closeAndFinalizeCheckpoint().

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

指定者:

close 在类中 org.apache.flink.core.fs.FSDataOutputStream

抛出:

IOException - Thrown, if the stream cannot be closed.