org.apache.trevni.avro.mapreduce

Class AvroTrevniKeyValueInputFormat<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.trevni.avro.mapreduce.AvroTrevniKeyValueInputFormat<K,V>

Type Parameters:

K - The type of the Trevni key to read.

V - The type of the Trevni value to read.

A subset schema to be read may be specified with AvroJob.setInputKeySchema(org.apache.hadoop.mapreduce.Job, org.apache.avro.Schema) and AvroJob.setInputValueSchema(org.apache.hadoop.mapreduce.Job, org.apache.avro.Schema).

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

An InputFormat for Trevni files. This implement was modeled off AvroKeyValueInputFormat to allow for easy transition

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

Trevni 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

Field Summary

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

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

Constructor Summary

Constructors

Constructor and Description
AvroTrevniKeyValueInputFormat()

Method Summary

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, 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

AvroTrevniKeyValueInputFormat

public AvroTrevniKeyValueInputFormat()

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