org.apache.flink.runtime.state.filesystem

类 FsCheckpointStreamFactory.FsCheckpointStateOutputStream

java.lang.Object

java.io.OutputStream

org.apache.flink.core.fs.FSDataOutputStream

org.apache.flink.runtime.state.CheckpointStateOutputStream

org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory.FsCheckpointStateOutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable

封闭类:

FsCheckpointStreamFactory

public static class FsCheckpointStreamFactory.FsCheckpointStateOutputStream
extends CheckpointStateOutputStream

A CheckpointStateOutputStream that writes into a file and returns a StreamStateHandle upon closing.

构造器概要

构造器

构造器和说明
FsCheckpointStateOutputStream(org.apache.flink.core.fs.Path basePath, org.apache.flink.core.fs.FileSystem fs, int bufferSize, int localStateThreshold)
FsCheckpointStateOutputStream(org.apache.flink.core.fs.Path basePath, org.apache.flink.core.fs.FileSystem fs, int bufferSize, int localStateThreshold, boolean allowRelativePaths)

方法概要

限定符和类型	方法和说明
void	close() If the stream is only closed, we remove the produced file (cleanup through the auto close feature, for example).
StreamStateHandle	closeAndGetHandle() Closes the stream and gets a state handle that can create an input stream producing the data written to this stream.
void	flush() Flush buffers to file if their size is above localStateThreshold.
void	flushToFile()
long	getPos()
boolean	isClosed() Checks whether the stream is closed.
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

FsCheckpointStateOutputStream

public FsCheckpointStateOutputStream(org.apache.flink.core.fs.Path basePath,
                                     org.apache.flink.core.fs.FileSystem fs,
                                     int bufferSize,
                                     int localStateThreshold)

FsCheckpointStateOutputStream

public FsCheckpointStateOutputStream(org.apache.flink.core.fs.Path basePath,
                                     org.apache.flink.core.fs.FileSystem fs,
                                     int bufferSize,
                                     int localStateThreshold,
                                     boolean allowRelativePaths)

方法详细资料

write

public void write(int b)
           throws IOException

指定者:

write 在类中 OutputStream

抛出:

IOException

write

public void write(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

flushToFile

public void flushToFile()
                 throws IOException

抛出:

IOException

flush

public void flush()
           throws IOException

Flush buffers to file if their size is above localStateThreshold.

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()

Checks whether the stream is closed.

返回:

True if the stream was closed, false if it is still open.

close

public void close()

If the stream is only closed, we remove the produced file (cleanup through the auto close feature, for example). This method throws no exception if the deletion fails, but only logs the error.

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 CheckpointStateOutputStream

closeAndGetHandle

@Nullable
public StreamStateHandle closeAndGetHandle()
                                              throws IOException

从类复制的说明: CheckpointStateOutputStream

Closes the stream and gets a state handle that can create an input stream producing the data written to this stream.

This closing must be called (also when the caller is not interested in the handle) to successfully close the stream and retain the produced resource. In contrast, the CheckpointStateOutputStream.close() method removes the target resource when called.

指定者:

closeAndGetHandle 在类中 CheckpointStateOutputStream

返回:

A state handle that can create an input stream producing the data written to this stream.

抛出:

IOException - Thrown, if the stream cannot be closed.