Package org.apache.avro.mapreduce

Class AvroKeyValueInputFormat<K,V>

java.lang.Object

org.apache.hadoop.mapreduce.InputFormat<AvroKey<K>,AvroValue<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 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

FileInputFormat.Counter

Field Summary

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

DEFAULT_LIST_STATUS_NUM_THREADS, INPUT_DIR, INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS, INPUT_DIR_RECURSIVE, LIST_STATUS_NUM_THREADS, NUM_INPUT_FILES, PATHFILTER_CLASS, SPLIT_MAXSIZE, SPLIT_MINSIZE

Constructor Summary

Constructors

Constructor	Description
AvroKeyValueInputFormat()

Method Summary

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

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

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getFormatMinSplitSize, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, getSplits, isSplitable, listStatus, makeSplit, 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 Details

AvroKeyValueInputFormat

public AvroKeyValueInputFormat()

Method Details

createRecordReader

public RecordReader<AvroKey<K>,AvroValue<V>> createRecordReader(InputSplit split,
 TaskAttemptContext context)
                                                         throws IOException,
InterruptedException

Specified by:

createRecordReader in class InputFormat<AvroKey<K>,AvroValue<V>>

Throws:

IOException

InterruptedException