org.apache.pig.piggybank.storage.avro

Class PigAvroInputFormat

java.lang.Object

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

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

org.apache.pig.piggybank.storage.avro.PigAvroInputFormat

public class PigAvroInputFormat
extends org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Writable>

The InputFormat for avro data.

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
PigAvroInputFormat() empty constructor
PigAvroInputFormat(org.apache.avro.Schema readerSchema, boolean ignoreBadFiles, Map<org.apache.hadoop.fs.Path,Map<Integer,Integer>> schemaToMergedSchemaMap, boolean useMultipleSchemas) constructor called by AvroStorage to pass in schema and ignoreBadFiles.

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Writable>	createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context) Create and return an avro record reader.
protected List<org.apache.hadoop.fs.FileStatus>	listStatus(org.apache.hadoop.mapreduce.JobContext job)

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

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

PigAvroInputFormat

public PigAvroInputFormat()

empty constructor

PigAvroInputFormat

public PigAvroInputFormat(org.apache.avro.Schema readerSchema,
                  boolean ignoreBadFiles,
                  Map<org.apache.hadoop.fs.Path,Map<Integer,Integer>> schemaToMergedSchemaMap,
                  boolean useMultipleSchemas)

constructor called by AvroStorage to pass in schema and ignoreBadFiles.

Parameters:

readerSchema - reader schema

ignoreBadFiles - whether ignore corrupted files during load

schemaToMergedSchemaMap - map that associates each input record with a remapping of its fields relative to the merged schema

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Writable> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                                                                           org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                                                             throws IOException,
                                                                                                                                    InterruptedException

Create and return an avro record reader. It uses the input schema passed in to the constructor.

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Writable>

Throws:

IOException

InterruptedException

listStatus

protected List<org.apache.hadoop.fs.FileStatus> listStatus(org.apache.hadoop.mapreduce.JobContext job)
                                                    throws IOException

Overrides:

listStatus in class org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Writable>

Throws:

IOException