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

Constructor Summary

AvroKeyInputFormat()

Method Summary

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, 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

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