org.apache.avro.mapreduce

Class AvroKeyValueInputFormat<K,V>

java.lang.Object

org.apache.hadoop.mapreduce.InputFormat<K,V>

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<AvroKey<K>,AvroValue<V>>

org.apache.avro.mapreduce.AvroKeyValueInputFormat<K,V>

Type Parameters:

K - The type of the Avro key to read.

V - The type of the Avro value to read.

public class AvroKeyValueInputFormat<K,V>
extends org.apache.hadoop.mapreduce.lib.input.FileInputFormat<AvroKey<K>,AvroValue<V>>

A MapReduce InputFormat that reads from Avro container files of key/value generic records.

Avro container files that container generic records with the two fields 'key' and 'value' are expected. The contents of the 'key' field will be used as the job input key, and the contents of the 'value' field will be used as the job output value.

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
AvroKeyValueInputFormat()

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<AvroKey<K>,AvroValue<V>>	createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)

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

addInputPath, addInputPaths, computeSplitSize, getBlockIndex, getFormatMinSplitSize, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, getSplits, isSplitable, listStatus, 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

AvroKeyValueInputFormat

public AvroKeyValueInputFormat()

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<AvroKey<K>,AvroValue<V>> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                                   org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                     throws IOException,
                                                                                            InterruptedException

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<AvroKey<K>,AvroValue<V>>

Throws:

IOException

InterruptedException