org.apache.hadoop.examples.dancing

Class DistributedPentomino.PentMap

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<WritableComparable<?>,Text,Text,Text>

org.apache.hadoop.examples.dancing.DistributedPentomino.PentMap

Enclosing class:

DistributedPentomino

public static class DistributedPentomino.PentMap
extends Mapper<WritableComparable<?>,Text,Text,Text>

Each map takes a line, which represents a prefix move and finds all of the solutions that start with that prefix. The output is the prefix as the key and the solution as the value.

Nested Class Summary

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

Mapper.Context

Constructor Summary

Constructors

Constructor and Description
DistributedPentomino.PentMap()

Method Summary

Methods

Modifier and Type	Method and Description
void	map(WritableComparable<?> key, Text value, Mapper.Context context) Break the prefix string into moves (a sequence of integer row ids that will be selected for each column in order).
void	setup(Mapper.Context context) Called once at the beginning of the task.

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

Constructor Detail

DistributedPentomino.PentMap

public DistributedPentomino.PentMap()

Method Detail

map

public void map(WritableComparable<?> key,
       Text value,
       Mapper.Context context)
         throws IOException

Break the prefix string into moves (a sequence of integer row ids that will be selected for each column in order). Find all solutions with that prefix.

Overrides:

map in class Mapper<WritableComparable<?>,Text,Text,Text>

Throws:

IOException

setup

public void setup(Mapper.Context context)

Description copied from class: Mapper

Called once at the beginning of the task.

Overrides:

setup in class Mapper<WritableComparable<?>,Text,Text,Text>