AbstractChannelWriterOutputView (Flink : Runtime 2.1.1 API)

java.lang.Object
- org.apache.flink.runtime.memory.AbstractPagedOutputView
- - org.apache.flink.runtime.io.disk.iomanager.AbstractChannelWriterOutputView

All Implemented Interfaces:

DataOutput, org.apache.flink.core.memory.DataOutputView, org.apache.flink.core.memory.MemorySegmentWritable
```
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 Description

AbstractChannelWriterOutputView(int segmentSize, int headerLength)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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