org.apache.flink.runtime.state.filesystem

类 FsCheckpointMetadataOutputStream

java.lang.Object

java.io.OutputStream

org.apache.flink.core.fs.FSDataOutputStream

org.apache.flink.runtime.state.CheckpointMetadataOutputStream

org.apache.flink.runtime.state.filesystem.FsCheckpointMetadataOutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable

public final class FsCheckpointMetadataOutputStream
extends CheckpointMetadataOutputStream

A CheckpointMetadataOutputStream that writes a specified file and directory, and returns a FsCompletedCheckpointStorageLocation upon closing.

构造器概要

构造器

构造器和说明
FsCheckpointMetadataOutputStream(org.apache.flink.core.fs.FileSystem fileSystem, org.apache.flink.core.fs.Path metadataFilePath, org.apache.flink.core.fs.Path exclusiveCheckpointDir)

方法概要

限定符和类型	方法和说明
void	close() This method should close the stream, if has not been closed before.
FsCompletedCheckpointStorageLocation	closeAndFinalizeCheckpoint() Closes the stream after all metadata was written and finalizes the checkpoint location.
void	flush()
long	getPos()
boolean	isClosed()
void	sync()
void	write(byte[] b, int off, int len)
void	write(int b)

从类继承的方法 java.io.OutputStream

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

FsCheckpointMetadataOutputStream

public FsCheckpointMetadataOutputStream(org.apache.flink.core.fs.FileSystem fileSystem,
                                        org.apache.flink.core.fs.Path metadataFilePath,
                                        org.apache.flink.core.fs.Path exclusiveCheckpointDir)
                                 throws IOException

抛出:

IOException

方法详细资料

write

public final void write(int b)
                 throws IOException

指定者:

write 在类中 OutputStream

抛出:

IOException

write

public final void write(@Nonnull
                        byte[] b,
                        int off,
                        int len)
                 throws IOException

覆盖:

write 在类中 OutputStream

抛出:

IOException

getPos

public long getPos()
            throws IOException

指定者:

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

抛出:

IOException

flush

public void flush()
           throws IOException

指定者:

flush 在接口中 Flushable

指定者:

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

抛出:

IOException

sync

public void sync()
          throws IOException

指定者:

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

抛出:

IOException

isClosed

public boolean isClosed()

close

public void close()

从类复制的说明: CheckpointMetadataOutputStream

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 CheckpointMetadataOutputStream.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 CheckpointMetadataOutputStream

closeAndFinalizeCheckpoint

public FsCompletedCheckpointStorageLocation closeAndFinalizeCheckpoint()
                                                                throws IOException

从类复制的说明: CheckpointMetadataOutputStream

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

指定者:

closeAndFinalizeCheckpoint 在类中 CheckpointMetadataOutputStream

返回:

An object representing a finalized checkpoint storage location.

抛出:

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