@Override
public MsgList<DoubleWritable> finishFinal() {
agg.set(sum);
msgList.clear();
msgList.add(agg);
return msgList;
}
public AggregationEvaluator(
IHyracksTaskContext ctx,
IConfigurationFactory confFactory,
boolean isFinalStage,
boolean partialAggAsInput)
throws HyracksDataException {
this.conf = confFactory.createConfiguration(ctx);
this.isFinalStage = isFinalStage;
this.partialAggAsInput = partialAggAsInput;
msgList.setConf(this.conf);
combiner = BspUtils.createMessageCombiner(conf);
key = BspUtils.createVertexIndex(conf);
value =
!partialAggAsInput
? BspUtils.createMessageValue(conf)
: BspUtils.createPartialCombineValue(conf);
skipKey = BspUtils.getSkipCombinerKey(conf);
}