org.apache.hadoop.examples
Class MultiFileWordCount.MyInputFormat

java.lang.Object
  org.apache.hadoop.mapreduce.InputFormat<K,V>
      org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K,V>
          org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>
              org.apache.hadoop.examples.MultiFileWordCount.MyInputFormat

Enclosing class:

MultiFileWordCount

public static class MultiFileWordCount.MyInputFormat
extends org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

To use CombineFileInputFormat, one should extend it, to return a (custom) RecordReader. CombineFileInputFormat uses CombineFileSplits.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

org.apache.hadoop.mapreduce.lib.input.FileInputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat

SPLIT_MINSIZE_PERNODE, SPLIT_MINSIZE_PERRACK

Fields inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

INPUT_DIR, INPUT_DIR_RECURSIVE, NUM_INPUT_FILES, PATHFILTER_CLASS, SPLIT_MAXSIZE, SPLIT_MINSIZE

Constructor Summary

MultiFileWordCount.MyInputFormat()

Method Summary

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

createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat

createPool, createPool, getFileBlockLocations, getSplits, isSplitable, setMaxSplitSize, setMinSplitSizeNode, setMinSplitSizeRack

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getFormatMinSplitSize, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, listStatus, makeSplit, setInputDirRecursive, setInputPathFilter, setInputPaths, setInputPaths, setMaxInputSplitSize, setMinInputSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiFileWordCount.MyInputFormat

public MultiFileWordCount.MyInputFormat()

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                                                                            org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                                                     throws IOException

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text>

Throws:

IOException