org.apache.flink.table.runtime.operators.sort

Class BinaryExternalMerger

java.lang.Object

org.apache.flink.table.runtime.operators.sort.AbstractBinaryExternalMerger<BinaryRow>

org.apache.flink.table.runtime.operators.sort.BinaryExternalMerger

All Implemented Interfaces:

Closeable, AutoCloseable

public class BinaryExternalMerger
extends AbstractBinaryExternalMerger<BinaryRow>

Record merger for sort of BinaryRow.

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.sort.AbstractBinaryExternalMerger

ioManager, pageSize

Constructor Summary

Constructors

Constructor and Description
BinaryExternalMerger(org.apache.flink.runtime.io.disk.iomanager.IOManager ioManager, int pageSize, int maxFanIn, SpillChannelManager channelManager, BinaryRowSerializer serializer, RecordComparator comparator, boolean compressionEnable, BlockCompressionFactory compressionCodecFactory, int compressionBlockSize)

Method Summary

Modifier and Type	Method and Description
protected org.apache.flink.util.MutableObjectIterator<BinaryRow>	channelReaderInputViewIterator(org.apache.flink.runtime.io.disk.iomanager.AbstractChannelReaderInputView inView)
protected Comparator<BinaryRow>	mergeComparator()
protected List<BinaryRow>	mergeReusedEntries(int size)
protected void	writeMergingOutput(org.apache.flink.util.MutableObjectIterator<BinaryRow> mergeIterator, org.apache.flink.runtime.memory.AbstractPagedOutputView output) read the merged stream and write the data back.

Methods inherited from class org.apache.flink.table.runtime.operators.sort.AbstractBinaryExternalMerger

close, getMergingIterator, mergeChannelList

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryExternalMerger

public BinaryExternalMerger(org.apache.flink.runtime.io.disk.iomanager.IOManager ioManager,
                            int pageSize,
                            int maxFanIn,
                            SpillChannelManager channelManager,
                            BinaryRowSerializer serializer,
                            RecordComparator comparator,
                            boolean compressionEnable,
                            BlockCompressionFactory compressionCodecFactory,
                            int compressionBlockSize)

Method Detail

channelReaderInputViewIterator

protected org.apache.flink.util.MutableObjectIterator<BinaryRow> channelReaderInputViewIterator(org.apache.flink.runtime.io.disk.iomanager.AbstractChannelReaderInputView inView)

Specified by:

channelReaderInputViewIterator in class AbstractBinaryExternalMerger<BinaryRow>

Returns:

entry iterator reading from inView.

mergeComparator

protected Comparator<BinaryRow> mergeComparator()

Specified by:

mergeComparator in class AbstractBinaryExternalMerger<BinaryRow>

Returns:

merging comparator used in merging.

mergeReusedEntries

protected List<BinaryRow> mergeReusedEntries(int size)

Specified by:

mergeReusedEntries in class AbstractBinaryExternalMerger<BinaryRow>

Returns:

reused entry object used in merging.

writeMergingOutput

protected void writeMergingOutput(org.apache.flink.util.MutableObjectIterator<BinaryRow> mergeIterator,
                                  org.apache.flink.runtime.memory.AbstractPagedOutputView output)
                           throws IOException

Description copied from class: AbstractBinaryExternalMerger

read the merged stream and write the data back.

Specified by:

writeMergingOutput in class AbstractBinaryExternalMerger<BinaryRow>

Throws:

IOException