org.apache.giraph.aggregators

Class TextAppendAggregator

java.lang.Object

org.apache.giraph.aggregators.BasicAggregator<org.apache.hadoop.io.Text>

org.apache.giraph.aggregators.TextAppendAggregator

All Implemented Interfaces:

Aggregator<org.apache.hadoop.io.Text>

public class TextAppendAggregator
extends BasicAggregator<org.apache.hadoop.io.Text>

Aggregator with Text as its value which keeps appending text to it

Constructor Summary

Constructors

Constructor and Description
TextAppendAggregator()

Method Summary

Modifier and Type	Method and Description
void	aggregate(org.apache.hadoop.io.Text value) Add a new value.
org.apache.hadoop.io.Text	createInitialValue() Return new aggregated value which is neutral to aggregate operation.

Methods inherited from class org.apache.giraph.aggregators.BasicAggregator

getAggregatedValue, reset, setAggregatedValue

Methods inherited from class java.lang.Object

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

Constructor Detail

TextAppendAggregator

public TextAppendAggregator()

Method Detail

aggregate

public void aggregate(org.apache.hadoop.io.Text value)

Description copied from interface: Aggregator

Add a new value. Needs to be commutative and associative

Parameters:

value - Value to be aggregated.

createInitialValue

public org.apache.hadoop.io.Text createInitialValue()

Description copied from interface: Aggregator

Return new aggregated value which is neutral to aggregate operation. Must be changeable without affecting internals of Aggregator

Returns:

Neutral value