Package org.apache.hadoop.hbase.mapreduce

Class CellCounter.CellCounterMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,KEYOUT,VALUEOUT>

org.apache.hadoop.hbase.mapreduce.TableMapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

org.apache.hadoop.hbase.mapreduce.CellCounter.CellCounterMapper

Enclosing class:

CellCounter

static class CellCounter.CellCounterMapper
extends TableMapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

Mapper that runs the count.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	CellCounter.CellCounterMapper.Counters	Counter enumeration to count the actual rows.

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Field Summary

Fields

Modifier and Type	Field	Description
private org.apache.hadoop.conf.Configuration	conf
(package private) byte[]	currentFamily
(package private) String	currentFamilyName
(package private) byte[]	currentQualifier
(package private) String	currentQualifierName
private String	currentRowKey
(package private) String	currentRowQualifierName
private byte[]	lastRow
private String	separator

Constructor Summary

Constructors

Constructor	Description
CellCounterMapper()

Method Summary

Modifier and Type	Method	Description
void	map(ImmutableBytesWritable row, Result values, org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>.org.apache.hadoop.mapreduce.Mapper.Context context)	Maps the data.
protected void	setup(org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>.org.apache.hadoop.mapreduce.Mapper.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, run

Methods inherited from class java.lang.Object

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

Field Details

conf

private org.apache.hadoop.conf.Configuration conf

separator

private String separator

lastRow

private byte[] lastRow

currentRowKey

private String currentRowKey

currentFamily

byte[] currentFamily

currentFamilyName

String currentFamilyName

currentQualifier

byte[] currentQualifier

currentQualifierName

String currentQualifierName

currentRowQualifierName

String currentRowQualifierName

Constructor Details

CellCounterMapper

CellCounterMapper()

Method Details

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>.org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

Throws:

IOException

InterruptedException

map

public void map(ImmutableBytesWritable row,
 Result values,
 org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>.org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException

Maps the data.

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<ImmutableBytesWritable,Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>

Parameters:

row - The current table row key.

values - The columns.

context - The current context.

Throws:

IOException - When something is broken with the data.