org.apache.avro.mapred

Class AvroAsTextInputFormat

java.lang.Object

org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

org.apache.avro.mapred.AvroAsTextInputFormat

All Implemented Interfaces:

org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

public class AvroAsTextInputFormat
extends org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

An InputFormat for Avro data files, which converts each datum to string form in the input key. The input value is always empty. The string representation is JSON.

This InputFormat is useful for applications that wish to process Avro data using tools like MapReduce Streaming. By default, when pointed at a directory, this will silently skip over any files in it that do not have .avro extension. To instead include all files, set the avro.mapred.ignore.inputs.without.extension property to false.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapred.FileInputFormat

org.apache.hadoop.mapred.FileInputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapred.FileInputFormat

INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS, INPUT_DIR_RECURSIVE, LOG, NUM_INPUT_FILES

Constructor Summary

Constructors

Constructor and Description
AvroAsTextInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>	getRecordReader(org.apache.hadoop.mapred.InputSplit split, org.apache.hadoop.mapred.JobConf job, org.apache.hadoop.mapred.Reporter reporter)
protected org.apache.hadoop.fs.FileStatus[]	listStatus(org.apache.hadoop.mapred.JobConf job)

Methods inherited from class org.apache.hadoop.mapred.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, getSplits, isSplitable, makeSplit, makeSplit, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

AvroAsTextInputFormat

public AvroAsTextInputFormat()

Method Detail

listStatus

protected org.apache.hadoop.fs.FileStatus[] listStatus(org.apache.hadoop.mapred.JobConf job)
                                                throws IOException

Overrides:

listStatus in class org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

IOException

getRecordReader

public org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> getRecordReader(org.apache.hadoop.mapred.InputSplit split,
                                                                                                                  org.apache.hadoop.mapred.JobConf job,
                                                                                                                  org.apache.hadoop.mapred.Reporter reporter)
                                                                                                           throws IOException

Specified by:

getRecordReader in interface org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Specified by:

getRecordReader in class org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

IOException