org.janusgraph.hadoop.formats.util

Class HadoopRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

org.janusgraph.hadoop.formats.util.HadoopRecordReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class HadoopRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

Author:

Marko A. Rodriguez (https://markorodriguez.com)

Constructor Summary

Constructors

Constructor and Description
HadoopRecordReader(HadoopInputFormat.RefCountedCloseable<JanusGraphVertexDeserializer> countedDeserializer, org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>> reader)

Method Summary

Modifier and Type	Method and Description
void	close()
org.apache.hadoop.io.NullWritable	getCurrentKey()
org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable	getCurrentValue()
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit inputSplit, org.apache.hadoop.mapreduce.TaskAttemptContext taskAttemptContext)
boolean	nextKeyValue()

Methods inherited from class java.lang.Object

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

Constructor Detail

HadoopRecordReader

public HadoopRecordReader(HadoopInputFormat.RefCountedCloseable<JanusGraphVertexDeserializer> countedDeserializer,
                          org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>> reader)

Method Detail

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit inputSplit,
                       org.apache.hadoop.mapreduce.TaskAttemptContext taskAttemptContext)
                throws IOException,
                       InterruptedException

Specified by:

initialize in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

Throws:

IOException

InterruptedException

nextKeyValue

public boolean nextKeyValue()
                     throws IOException,
                            InterruptedException

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

Throws:

IOException

InterruptedException

getCurrentKey

public org.apache.hadoop.io.NullWritable getCurrentKey()

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

getCurrentValue

public org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable getCurrentValue()

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

Throws:

IOException

getProgress

public float getProgress()
                  throws IOException,
                         InterruptedException

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable>

Throws:

IOException

InterruptedException