org.apache.flink.api.java.operators.translation

Class PlanUnwrappingSortedReduceGroupOperator.TupleUnwrappingGroupCombinableGroupReducer<IN,OUT,K1,K2>

java.lang.Object

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

org.apache.flink.api.java.operators.translation.WrappingFunction<GroupReduceFunction<IN,OUT>>

org.apache.flink.api.java.operators.translation.PlanUnwrappingSortedReduceGroupOperator.TupleUnwrappingGroupCombinableGroupReducer<IN,OUT,K1,K2>

All Implemented Interfaces:

Serializable, Function, GroupCombineFunction<Tuple3<K1,K2,IN>,Tuple3<K1,K2,IN>>, GroupReduceFunction<Tuple3<K1,K2,IN>,OUT>, RichFunction

Enclosing class:

PlanUnwrappingSortedReduceGroupOperator<IN,OUT,K1,K2>

public static final class PlanUnwrappingSortedReduceGroupOperator.TupleUnwrappingGroupCombinableGroupReducer<IN,OUT,K1,K2>
extends WrappingFunction<GroupReduceFunction<IN,OUT>>
implements GroupReduceFunction<Tuple3<K1,K2,IN>,OUT>, GroupCombineFunction<Tuple3<K1,K2,IN>,Tuple3<K1,K2,IN>>

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.api.java.operators.translation.WrappingFunction

wrappedFunction

Method Summary

Modifier and Type	Method and Description
void	combine(Iterable<Tuple3<K1,K2,IN>> values, Collector<Tuple3<K1,K2,IN>> out) The combine method, called (potentially multiple timed) with subgroups of elements.
void	reduce(Iterable<Tuple3<K1,K2,IN>> values, Collector<OUT> out) The reduce method.
String	toString()

Methods inherited from class org.apache.flink.api.java.operators.translation.WrappingFunction

close, getWrappedFunction, open, setRuntimeContext

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

getIterationRuntimeContext, getRuntimeContext

Methods inherited from class java.lang.Object

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

Method Detail

reduce

public void reduce(Iterable<Tuple3<K1,K2,IN>> values,
                   Collector<OUT> out)
            throws Exception

Description copied from interface: GroupReduceFunction

The reduce method. The function receives one call per group of elements.

Specified by:

reduce in interface GroupReduceFunction<Tuple3<K1,K2,IN>,OUT>

Parameters:

values - All records that belong to the given input key.

out - The collector to hand results to.

Throws:

Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.

combine

public void combine(Iterable<Tuple3<K1,K2,IN>> values,
                    Collector<Tuple3<K1,K2,IN>> out)
             throws Exception

Description copied from interface: GroupCombineFunction

The combine method, called (potentially multiple timed) with subgroups of elements.

Specified by:

combine in interface GroupCombineFunction<Tuple3<K1,K2,IN>,Tuple3<K1,K2,IN>>

Parameters:

values - The elements to be combined.

out - The collector to use to return values from the function.

Throws:

Exception - The function may throw Exceptions, which will cause the program to cancel, and may trigger the recovery logic.

toString

public String toString()

Overrides:

toString in class Object