org.janusgraph.hadoop.formats.cassandra

Class CassandraBinaryRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>

org.janusgraph.hadoop.formats.cassandra.CassandraBinaryRecordReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class CassandraBinaryRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>

Wraps a ColumnFamilyRecordReader and converts CFRR's binary types to JanusGraph binary types.

Constructor Summary

Constructors

Constructor and Description
CassandraBinaryRecordReader(org.apache.cassandra.hadoop.ColumnFamilyRecordReader reader)

Method Summary

Modifier and Type	Method and Description
void	close()
StaticBuffer	getCurrentKey()
Iterable<Entry>	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

CassandraBinaryRecordReader

public CassandraBinaryRecordReader(org.apache.cassandra.hadoop.ColumnFamilyRecordReader 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<StaticBuffer,Iterable<Entry>>

Throws:

IOException

InterruptedException

nextKeyValue

public boolean nextKeyValue()
                     throws IOException,
                            InterruptedException

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>

Throws:

IOException

InterruptedException

getCurrentKey

public StaticBuffer getCurrentKey()
                           throws IOException,
                                  InterruptedException

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>

Throws:

IOException

InterruptedException

getCurrentValue

public Iterable<Entry> getCurrentValue()
                                throws IOException,
                                       InterruptedException

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>

Throws:

IOException

InterruptedException

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<StaticBuffer,Iterable<Entry>>

Throws:

IOException

getProgress

public float getProgress()

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<StaticBuffer,Iterable<Entry>>