org.apache.jena.hadoop.rdf.io.input.ntriples

Class BlockedNTriplesInputFormat

java.lang.Object

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

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<TKey,TValue>

org.apache.jena.hadoop.rdf.io.input.AbstractNLineFileInputFormat<org.apache.hadoop.io.LongWritable,TripleWritable>

org.apache.jena.hadoop.rdf.io.input.ntriples.BlockedNTriplesInputFormat

public class BlockedNTriplesInputFormat
extends AbstractNLineFileInputFormat<org.apache.hadoop.io.LongWritable,TripleWritable>

NTriples input format where files are processed as blocks of lines rather than in a line based manner as with the NTriplesInputFormat or as whole files with the WholeFileNTriplesInputFormat

This provides a compromise between the higher parser setup of creating more parsers and the benefit of being able to split input files over multiple mappers.

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
BlockedNTriplesInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,TripleWritable>	createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)

Methods inherited from class org.apache.jena.hadoop.rdf.io.input.AbstractNLineFileInputFormat

getSplits

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

addInputPath, addInputPaths, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, setInputDirRecursive, setInputPathFilter, setInputPaths, setInputPaths, setMaxInputSplitSize, setMinInputSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockedNTriplesInputFormat

public BlockedNTriplesInputFormat()

Method Detail

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,TripleWritable> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                                                                     org.apache.hadoop.mapreduce.TaskAttemptContext context)

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<org.apache.hadoop.io.LongWritable,TripleWritable>