Package org.apache.hadoop.mapreduce.task.reduce

Class DirectInMemoryReader<K,V>

java.lang.Object

org.apache.hadoop.mapred.IFile.Reader<K,V>

org.apache.hadoop.mapreduce.task.reduce.DirectInMemoryReader<K,V>

public class DirectInMemoryReader<K,V>
extends org.apache.hadoop.mapred.IFile.Reader<K,V>

Field Summary

Fields inherited from class org.apache.hadoop.mapred.IFile.Reader

buffer, bufferSize, bytesRead, currentKeyLength, currentValueLength, dataIn, eof, fileLength, recNo

Constructor Summary

Constructors

Constructor	Description
DirectInMemoryReader(DirectShuffleMergeManagerImpl<K,V> merger, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptId, byte[] data, int start, int length, org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method	Description
void	close()
long	getLength()
long	getPosition()
boolean	nextRawKey(org.apache.hadoop.io.DataInputBuffer key)
void	nextRawValue(org.apache.hadoop.io.DataInputBuffer value)
void	reset(int offset)

Methods inherited from class org.apache.hadoop.mapred.IFile.Reader

disableChecksumValidation, positionToNextRecord

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectInMemoryReader

public DirectInMemoryReader(DirectShuffleMergeManagerImpl<K,V> merger,
                            org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptId,
                            byte[] data,
                            int start,
                            int length,
                            org.apache.hadoop.conf.Configuration conf)
                     throws java.io.IOException

Throws:

java.io.IOException

Method Detail

reset

public void reset(int offset)

Overrides:

reset in class org.apache.hadoop.mapred.IFile.Reader<K,V>

getPosition

public long getPosition()
                 throws java.io.IOException

Overrides:

getPosition in class org.apache.hadoop.mapred.IFile.Reader<K,V>

Throws:

java.io.IOException

getLength

public long getLength()

Overrides:

getLength in class org.apache.hadoop.mapred.IFile.Reader<K,V>

nextRawKey

public boolean nextRawKey(org.apache.hadoop.io.DataInputBuffer key)
                   throws java.io.IOException

Overrides:

nextRawKey in class org.apache.hadoop.mapred.IFile.Reader<K,V>

Throws:

java.io.IOException

nextRawValue

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

Overrides:

nextRawValue in class org.apache.hadoop.mapred.IFile.Reader<K,V>

Throws:

java.io.IOException

close

public void close()

Overrides:

close in class org.apache.hadoop.mapred.IFile.Reader<K,V>