org.apache.flink.streaming.api.functions.aggregation

Class SumAggregator<T>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.api.common.functions.RichReduceFunction<T>

org.apache.flink.streaming.api.functions.aggregation.AggregationFunction<T>

org.apache.flink.streaming.api.functions.aggregation.SumAggregator<T>

All Implemented Interfaces:

Serializable, Function, ReduceFunction<T>, RichFunction

public class SumAggregator<T>
extends AggregationFunction<T>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.functions.aggregation.AggregationFunction

AggregationFunction.AggregationType

Constructor Summary

Constructors

Constructor and Description
SumAggregator(int pos, TypeInformation<T> typeInfo, ExecutionConfig config)
SumAggregator(String field, TypeInformation<T> typeInfo, ExecutionConfig config)

Method Summary

Methods

Modifier and Type	Method and Description
T	reduce(T value1, T value2)

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

SumAggregator

public SumAggregator(int pos,
             TypeInformation<T> typeInfo,
             ExecutionConfig config)

SumAggregator

public SumAggregator(String field,
             TypeInformation<T> typeInfo,
             ExecutionConfig config)

Method Detail

reduce

public T reduce(T value1,
       T value2)
         throws Exception

Specified by:

reduce in interface ReduceFunction<T>

Specified by:

reduce in class RichReduceFunction<T>

Throws:

Exception