public class Count extends Object implements CombinerAggregator<Long>
Constructor and Description |
---|
Count() |
public Long init(TridentTuple tuple)
init
in interface CombinerAggregator<Long>
public Long combine(Long val1, Long val2)
combine
in interface CombinerAggregator<Long>
public Long zero()
zero
in interface CombinerAggregator<Long>
Copyright © 2014 The Apache Software Foundation. All Rights Reserved.