co.cask.cdap.etl.spark.function

Class AggregatorGroupByFunction<GROUP_KEY,GROUP_VAL>

java.lang.Object

co.cask.cdap.etl.spark.function.AggregatorGroupByFunction<GROUP_KEY,GROUP_VAL>

Type Parameters:

GROUP_KEY - type of group key

GROUP_VAL - type of group val

All Implemented Interfaces:

PairFlatMapFunc<GROUP_VAL,GROUP_KEY,GROUP_VAL>, Serializable

public class AggregatorGroupByFunction<GROUP_KEY,GROUP_VAL>
extends Object
implements PairFlatMapFunc<GROUP_VAL,GROUP_KEY,GROUP_VAL>

Function that uses a BatchAggregator to perform the groupBy part of the aggregator. Non-serializable fields are lazily created since this is used in a Spark closure.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AggregatorGroupByFunction(PluginFunctionContext pluginFunctionContext)

Method Summary

Modifier and Type	Method and Description
Iterable<scala.Tuple2<GROUP_KEY,GROUP_VAL>>	call(GROUP_VAL input)

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregatorGroupByFunction

public AggregatorGroupByFunction(PluginFunctionContext pluginFunctionContext)

Method Detail

call

public Iterable<scala.Tuple2<GROUP_KEY,GROUP_VAL>> call(GROUP_VAL input)
                                                 throws Exception

Specified by:

call in interface PairFlatMapFunc<GROUP_VAL,GROUP_KEY,GROUP_VAL>

Throws:

Exception