com.hazelcast.mapreduce

Interface CombinerFactory<KeyIn,ValueIn,ValueOut>

Type Parameters:

KeyIn - key type of the resulting keys

ValueIn - value type of the incoming values

ValueOut - value type of the reduced values

All Superinterfaces:

Serializable

Deprecated.

MapReduce is deprecated and will be removed in 4.0. For map aggregations, you can use Aggregator on IMap. For general data processing, it is superseded by Hazelcast Jet.

@Deprecated
public interface CombinerFactory<KeyIn,ValueIn,ValueOut>
extends Serializable

A CombinerFactory implementation is used to build Combiner instances per key.
An implementation needs to be serializable by Hazelcast since it is distributed together with the Mapper implementation to run alongside.

Since:

3.2

Method Summary

Modifier and Type	Method and Description
Combiner<ValueIn,ValueOut>	newCombiner(KeyIn key) Deprecated. Build a new Combiner instance specific to the supplied key.

Method Detail

newCombiner

Combiner<ValueIn,ValueOut> newCombiner(KeyIn key)

Deprecated.

Build a new Combiner instance specific to the supplied key.

Parameters:

key - key that the new Combiner is build for

Returns:

a Combiner instance specific for the given key