Package org.apache.hadoop.examples

Class MultiFileWordCount.CombineFileLineRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

org.apache.hadoop.examples.MultiFileWordCount.CombineFileLineRecordReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Enclosing class:

MultiFileWordCount

public static class MultiFileWordCount.CombineFileLineRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

RecordReader is responsible from extracting records from a chunk of the CombineFileSplit.

Constructor Summary

Constructors

Constructor	Description
CombineFileLineRecordReader(org.apache.hadoop.mapreduce.lib.input.CombineFileSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context, java.lang.Integer index)

Method Summary

Modifier and Type	Method	Description
void	close()
MultiFileWordCount.WordOffset	getCurrentKey()
org.apache.hadoop.io.Text	getCurrentValue()
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
boolean	nextKeyValue()

Methods inherited from class java.lang.Object

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

Constructor Detail

CombineFileLineRecordReader

public CombineFileLineRecordReader(org.apache.hadoop.mapreduce.lib.input.CombineFileSplit split,
                                   org.apache.hadoop.mapreduce.TaskAttemptContext context,
                                   java.lang.Integer index)
                            throws java.io.IOException

Throws:

java.io.IOException

Method Detail

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit split,
                       org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws java.io.IOException,
                       java.lang.InterruptedException

Specified by:

initialize in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Specified by:

close in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

getProgress

public float getProgress()
                  throws java.io.IOException

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

nextKeyValue

public boolean nextKeyValue()
                     throws java.io.IOException

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

getCurrentKey

public MultiFileWordCount.WordOffset getCurrentKey()
                                            throws java.io.IOException,
                                                   java.lang.InterruptedException

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

getCurrentValue

public org.apache.hadoop.io.Text getCurrentValue()
                                          throws java.io.IOException,
                                                 java.lang.InterruptedException

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException