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:

Closeable

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

MultiFileWordCount.CombineFileLineRecordReader(org.apache.hadoop.mapreduce.lib.input.CombineFileSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context, Integer index)

Method Summary

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

MultiFileWordCount.CombineFileLineRecordReader

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

Throws:

IOException

Method Detail

initialize

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

Specified by:

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

Throws:

IOException

InterruptedException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

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

Throws:

IOException

getProgress

public float getProgress()
                  throws IOException

Specified by:

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

Throws:

IOException

nextKeyValue

public boolean nextKeyValue()
                     throws IOException

Specified by:

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

Throws:

IOException

getCurrentKey

public MultiFileWordCount.WordOffset getCurrentKey()
                                            throws IOException,
                                                   InterruptedException

Specified by:

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

Throws:

IOException

InterruptedException

getCurrentValue

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

Specified by:

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

Throws:

IOException

InterruptedException