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

Class ComparableAggregator<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.ComparableAggregator<T>

All Implemented Interfaces:

Serializable, Function, ReduceFunction<T>, RichFunction

public class ComparableAggregator<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
ComparableAggregator(int positionToAggregate, TypeInformation<T> typeInfo, AggregationFunction.AggregationType aggregationType, boolean first, ExecutionConfig config)
ComparableAggregator(int positionToAggregate, TypeInformation<T> typeInfo, AggregationFunction.AggregationType aggregationType, ExecutionConfig config)
ComparableAggregator(String field, TypeInformation<T> typeInfo, AggregationFunction.AggregationType aggregationType, boolean first, 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

ComparableAggregator

public ComparableAggregator(int positionToAggregate,
                    TypeInformation<T> typeInfo,
                    AggregationFunction.AggregationType aggregationType,
                    ExecutionConfig config)

ComparableAggregator

public ComparableAggregator(int positionToAggregate,
                    TypeInformation<T> typeInfo,
                    AggregationFunction.AggregationType aggregationType,
                    boolean first,
                    ExecutionConfig config)

ComparableAggregator

public ComparableAggregator(String field,
                    TypeInformation<T> typeInfo,
                    AggregationFunction.AggregationType aggregationType,
                    boolean first,
                    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