@Override
public Value<MapReduceResult<R>> run(
ResultAndCounters<List<AppEngineFile>> mapResult, ShuffleResult<K, V, O> shuffleResult) {
@SuppressWarnings("unchecked")
PromisedValue<MapReduceResult<R>> result = (PromisedValue) newPromise(MapReduceResult.class);
String shardedJobId = mrJobId + "-reduce";
startShardedJob(
mrSpec.getJobName() + " (reduce phase)",
shardedJobId,
mapResult.getCounters(),
shuffleResult.getReducerReaders(),
mrSpec.getOutput(),
shuffleResult.getReducerWriters(),
new TaskCreator<KeyValue<K, ReducerInput<V>>, O, ReducerContext<O>>() {
@Override
public WorkerShardTask<KeyValue<K, ReducerInput<V>>, O, ReducerContext<O>> createTask(
int shard,
int shardCount,
InputReader<KeyValue<K, ReducerInput<V>>> reader,
OutputWriter<O> writer) {
return new ReduceShardTask<K, V, O>(
mrJobId,
shard,
shardCount,
reader,
mrSpec.getReducer(),
writer,
settings.getMillisPerSlice());
}
},
result.getHandle(),
settings);
setStatusConsoleUrl(settings.getBaseUrl() + "detail?mapreduce_id=" + shardedJobId);
return result;
}
@Override
public Value<Void> run(ShuffleResult<K, V, O> shuffleResult) {
futureCall(
new DeleteFilesJob("" + this),
immediate(shuffleResult.getReducerInputFiles()),
Util.jobSettings(settings));
return immediate(null);
}
