org.apache.tinkerpop.gremlin.process.computer

Interface MapReduce.ReduceEmitter<OK,OV>

Type Parameters:

OK - the key type

OV - the value type

All Known Implementing Classes:

HadoopCombine.HadoopCombineEmitter, HadoopReduce.HadoopReduceEmitter, TinkerReduceEmitter

Enclosing interface:

MapReduce<MK,MV,RK,RV,R>

public static interface MapReduce.ReduceEmitter<OK,OV>

The ReduceEmitter is used to emit key/value pairs from the combine() and reduce() stages of the MapReduce job. The implementation of ReduceEmitter is up to the vendor, not the developer.

Method Summary

Modifier and Type	Method and Description
void	emit(OK key, OV value)
default void	emit(OV value) A default method that assumes the key is MapReduce.NullObject.

Method Detail

emit

void emit(OK key,
          OV value)

emit

default void emit(OV value)

A default method that assumes the key is MapReduce.NullObject.

Parameters:

value - the value to emit.