org.apache.cassandra.hadoop

Class ColumnFamilyRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

org.apache.cassandra.hadoop.ColumnFamilyRecordReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

public class ColumnFamilyRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>
implements org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Field Summary

Fields

Modifier and Type	Field and Description
static int	CASSANDRA_HADOOP_MAX_KEY_SIZE_DEFAULT

Constructor Summary

Constructors

Constructor and Description
ColumnFamilyRecordReader()
ColumnFamilyRecordReader(int keyBufferSize)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
java.nio.ByteBuffer	createKey()
java.util.SortedMap<java.nio.ByteBuffer,Column>	createValue()
java.nio.ByteBuffer	getCurrentKey()
java.util.SortedMap<java.nio.ByteBuffer,Column>	getCurrentValue()
long	getPos()
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
boolean	next(java.nio.ByteBuffer key, java.util.SortedMap<java.nio.ByteBuffer,Column> value)
boolean	nextKeyValue()

Methods inherited from class java.lang.Object

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

Field Detail

CASSANDRA_HADOOP_MAX_KEY_SIZE_DEFAULT

public static final int CASSANDRA_HADOOP_MAX_KEY_SIZE_DEFAULT

See Also:

Constant Field Values

Constructor Detail

ColumnFamilyRecordReader

public ColumnFamilyRecordReader()

ColumnFamilyRecordReader

public ColumnFamilyRecordReader(int keyBufferSize)

Method Detail

close

public void close()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Specified by:

close in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

getCurrentKey

public java.nio.ByteBuffer getCurrentKey()

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

getCurrentValue

public java.util.SortedMap<java.nio.ByteBuffer,Column> getCurrentValue()

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

getProgress

public float getProgress()

Specified by:

getProgress in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit split,
              org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws java.io.IOException

Specified by:

initialize in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Throws:

java.io.IOException

nextKeyValue

public boolean nextKeyValue()
                     throws java.io.IOException

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Throws:

java.io.IOException

next

public boolean next(java.nio.ByteBuffer key,
           java.util.SortedMap<java.nio.ByteBuffer,Column> value)
             throws java.io.IOException

Specified by:

next in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Throws:

java.io.IOException

createKey

public java.nio.ByteBuffer createKey()

Specified by:

createKey in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

createValue

public java.util.SortedMap<java.nio.ByteBuffer,Column> createValue()

Specified by:

createValue in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

getPos

public long getPos()
            throws java.io.IOException

Specified by:

getPos in interface org.apache.hadoop.mapred.RecordReader<java.nio.ByteBuffer,java.util.SortedMap<java.nio.ByteBuffer,Column>>

Throws:

java.io.IOException