@Override
public MsgList<DoubleWritable> finishFinal() {
agg.set(sum);
msgList.clear();
msgList.add(agg);
return msgList;
}
@Override
public void compute(Iterator<DoubleWritable> msgIterator) {
if (getSuperstep() == 1) {
tmpVertexValue.set(1.0 / getNumVertices());
setVertexValue(tmpVertexValue);
}
if (getSuperstep() >= 2 && getSuperstep() <= maxIteration) {
double sum = 0;
while (msgIterator.hasNext()) {
sum += msgIterator.next().get();
}
tmpVertexValue.set(0.15 / getNumVertices() + 0.85 * sum);
setVertexValue(tmpVertexValue);
}
if (getSuperstep() >= 1 && getSuperstep() < maxIteration) {
long edges = getNumOutEdges();
outputValue.set(getVertexValue().get() / edges);
sendMsgToAllEdges(outputValue);
} else {
voteToHalt();
}
}
@Override
public void setPartialCombineState(DoubleWritable combineState) {
sum = combineState.get();
}
@Override
public void stepFinal(VLongWritable vertexIndex, DoubleWritable partialAggregate)
throws HyracksDataException {
sum += partialAggregate.get();
}
@Override
public DoubleWritable finishPartial() {
agg.set(sum);
return agg;
}
@Override
public void stepPartial(VLongWritable vertexIndex, DoubleWritable msg)
throws HyracksDataException {
sum += msg.get();
}