org.apache.giraph.aggregators

Class IntSumAggregator

java.lang.Object

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

org.apache.giraph.aggregators.IntSumAggregator

All Implemented Interfaces:

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

public class IntSumAggregator
extends BasicAggregator<org.apache.hadoop.io.IntWritable>

Aggregator for summing up integer values.

Constructor Summary

Constructors

Constructor and Description
IntSumAggregator()

Method Summary

Modifier and Type	Method and Description
void	aggregate(org.apache.hadoop.io.IntWritable value) Add a new value.
org.apache.hadoop.io.IntWritable	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

IntSumAggregator

public IntSumAggregator()

Method Detail

aggregate

public void aggregate(org.apache.hadoop.io.IntWritable 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.IntWritable 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