org.apache.avro.mapreduce

Class AvroKeyInputFormat<T>

java.lang.Object

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

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<AvroKey<T>,org.apache.hadoop.io.NullWritable>

org.apache.avro.mapreduce.AvroKeyInputFormat<T>

public class AvroKeyInputFormat<T>
extends org.apache.hadoop.mapreduce.lib.input.FileInputFormat<AvroKey<T>,org.apache.hadoop.io.NullWritable>

A MapReduce InputFormat that can handle Avro container files.

Keys are AvroKey wrapper objects that contain the Avro data. Since Avro container files store only records (not key/value pairs), the value from this InputFormat is a NullWritable.

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.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 and Description
AvroKeyInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<AvroKey<T>,org.apache.hadoop.io.NullWritable>	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, 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 Detail

AvroKeyInputFormat

public AvroKeyInputFormat()

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<AvroKey<T>,org.apache.hadoop.io.NullWritable> 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<T>,org.apache.hadoop.io.NullWritable>

Throws:

IOException

InterruptedException