org.apache.flink.runtime.io.disk

Class SpillingBuffer

java.lang.Object

org.apache.flink.runtime.memory.AbstractPagedOutputView

org.apache.flink.runtime.io.disk.SpillingBuffer

All Implemented Interfaces:

DataOutput, DataOutputView, MemorySegmentWritable

public class SpillingBuffer
extends AbstractPagedOutputView

An output view that buffers written data in memory pages and spills them when they are full.

Field Summary

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

headerLength, segmentSize

Constructor Summary

Constructors

Constructor and Description
SpillingBuffer(IOManager ioManager, MemorySegmentSource memSource, int segmentSize)

Method Summary

Modifier and Type	Method and Description
List<MemorySegment>	close()
DataInputView	flip()
protected MemorySegment	nextSegment(MemorySegment current, int positionInCurrent) This method must return a segment.

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

advance, clear, getCurrentPositionInSegment, getCurrentSegment, getHeaderLength, getSegmentSize, 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

SpillingBuffer

public SpillingBuffer(IOManager ioManager,
                      MemorySegmentSource memSource,
                      int segmentSize)

Method Detail

nextSegment

protected MemorySegment nextSegment(MemorySegment current,
                                    int positionInCurrent)
                             throws IOException

Description copied from class: AbstractPagedOutputView

This method must return a segment. If no more segments are available, it must throw an EOFException.

Specified by:

nextSegment in class AbstractPagedOutputView

Parameters:

current - The current memory segment

positionInCurrent - The position in the segment, one after the last valid byte.

Returns:

The next memory segment.

Throws:

IOException

flip

public DataInputView flip()
                   throws IOException

Throws:

IOException

close

public List<MemorySegment> close()
                          throws IOException

Returns:

A list with all memory segments that have been taken from the memory segment source.

Throws:

IOException