org.apache.flink.python.api.functions.util

Class IdentityGroupReduce<IN>

java.lang.Object

org.apache.flink.python.api.functions.util.IdentityGroupReduce<IN>

All Implemented Interfaces:

Serializable, Function, GroupReduceFunction<IN,IN>

public class IdentityGroupReduce<IN>
extends Object
implements GroupReduceFunction<IN,IN>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IdentityGroupReduce()

Method Summary

Modifier and Type	Method and Description
void	reduce(Iterable<IN> values, Collector<IN> out) The reduce method.

Methods inherited from class java.lang.Object

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

Constructor Detail

IdentityGroupReduce

public IdentityGroupReduce()

Method Detail

reduce

public final void reduce(Iterable<IN> values,
                         Collector<IN> 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<IN,IN>

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.