org.apache.tez.runtime.library.common.shuffle.orderedgrouped

Class InMemoryReader

java.lang.Object

org.apache.tez.runtime.library.common.sort.impl.IFile.Reader

org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader

@InterfaceAudience.Private
 @InterfaceStability.Unstable
public class InMemoryReader
extends IFile.Reader

IFile.InMemoryReader to read map-outputs present in-memory.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.tez.runtime.library.common.sort.impl.IFile.Reader

IFile.Reader.KeyState

Field Summary

Fields inherited from class org.apache.tez.runtime.library.common.sort.impl.IFile.Reader

buffer, bufferSize, bytesRead, currentKeyLength, currentValueLength, dataIn, eof, MAX_BUFFER_SIZE, originalKeyLength, prevKeyLength, recNo

Constructor Summary

Constructors

Constructor and Description
InMemoryReader(MergeManager merger, InputAttemptIdentifier taskAttemptId, byte[] data, int start, int length)

Method Summary

Modifier and Type	Method and Description
void	close()
long	getLength()
long	getPosition()
void	nextRawValue(org.apache.hadoop.io.DataInputBuffer value)
protected void	readKeyValueLength(DataInput dIn)
IFile.Reader.KeyState	readRawKey(org.apache.hadoop.io.DataInputBuffer key)
void	reset(int offset)

Methods inherited from class org.apache.tez.runtime.library.common.sort.impl.IFile.Reader

disableChecksumValidation, isCompressedFlagEnabled, nextRawKey, positionToNextRecord, readToDisk, readToMemory, readValueLength

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryReader

public InMemoryReader(MergeManager merger,
                      InputAttemptIdentifier taskAttemptId,
                      byte[] data,
                      int start,
                      int length)
               throws IOException

Throws:

IOException

Method Detail

reset

public void reset(int offset)

Overrides:

reset in class IFile.Reader

getPosition

public long getPosition()
                 throws IOException

Overrides:

getPosition in class IFile.Reader

Throws:

IOException

getLength

public long getLength()

Overrides:

getLength in class IFile.Reader

readKeyValueLength

protected void readKeyValueLength(DataInput dIn)
                           throws IOException

Overrides:

readKeyValueLength in class IFile.Reader

Throws:

IOException

readRawKey

public IFile.Reader.KeyState readRawKey(org.apache.hadoop.io.DataInputBuffer key)
                                 throws IOException

Overrides:

readRawKey in class IFile.Reader

Throws:

IOException

nextRawValue

public void nextRawValue(org.apache.hadoop.io.DataInputBuffer value)
                  throws IOException

Overrides:

nextRawValue in class IFile.Reader

Throws:

IOException

close

public void close()

Overrides:

close in class IFile.Reader