org.apache.flink.runtime.io.disk.iomanager

Class AbstractChannelWriterOutputView

java.lang.Object

org.apache.flink.runtime.memory.AbstractPagedOutputView

org.apache.flink.runtime.io.disk.iomanager.AbstractChannelWriterOutputView

All Implemented Interfaces:

DataOutput, DataOutputView, MemorySegmentWritable

Direct Known Subclasses:

CompressedHeaderlessChannelWriterOutputView, HeaderlessChannelWriterOutputView

public abstract class AbstractChannelWriterOutputView
extends AbstractPagedOutputView

A DataOutputView that is backed by a FileIOChannel, making it effectively a data output stream. The view writes it data in blocks to the underlying channel.

Field Summary

Fields inherited from class org.apache.flink.runtime.memory.AbstractPagedOutputView

headerLength, segmentSize

Constructor Summary

Constructors

Constructor and Description
AbstractChannelWriterOutputView(int segmentSize, int headerLength)

Method Summary

Modifier and Type	Method and Description
abstract int	close() Closes this OutputView, closing the underlying writer
abstract int	getBlockCount() Gets the number of blocks used by this view.
abstract FileIOChannel	getChannel() Get the underlying channel.
abstract long	getNumBytes() Get output bytes.
abstract long	getNumCompressedBytes() Get output compressed bytes, return num bytes if there is no compression.

Methods inherited from class org.apache.flink.runtime.memory.AbstractPagedOutputView

advance, clear, getCurrentPositionInSegment, getCurrentSegment, getHeaderLength, getSegmentSize, nextSegment, seekOutput, skipBytesToWrite, write, write, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractChannelWriterOutputView

public AbstractChannelWriterOutputView(int segmentSize,
                                       int headerLength)

Method Detail

getChannel

public abstract FileIOChannel getChannel()

Get the underlying channel.

close

public abstract int close()
                   throws IOException

Closes this OutputView, closing the underlying writer

Returns:

the number of bytes in last memory segment.

Throws:

IOException

getBlockCount

public abstract int getBlockCount()

Gets the number of blocks used by this view.

getNumBytes

public abstract long getNumBytes()
                          throws IOException

Get output bytes.

Throws:

IOException

getNumCompressedBytes

public abstract long getNumCompressedBytes()
                                    throws IOException

Get output compressed bytes, return num bytes if there is no compression.

Throws:

IOException