adamjshook / mapreducepatterns Goto Github PK

UserIdReputationEnrichmentMapper's map method:
String reputation = userIdToReputation.get(key.toString());
if (reputation != null) {
outkey.set(value.get() + "\t" + reputation);
output.collect(outkey, value);
}
the outputkey is userId\tReputation.
as the book sayed: Reducer code. This reducer implementation sums the values together and outputs this summation with the input key: user ID and reputation.
so the third line should be:
outkey.set(key.toString() + "\t" + reputation);

Please provide link where can i get the data for succesfully running the code

In the code for the MedianStdDevCombiner class given on page 31 of the PDF version and in the source code donwloads, if count != null its value is updated but not used. I think it should be used to update outValue and doing so affects the results. The way I did this is with "outValue.put(entry.getKey(), count);"