@Override
public void addMapReduce(MapReduce mapReduce) {
Preconditions.checkArgument(mapReduce != null, "MapReduce cannot be null.");
DefaultMapReduceConfigurer configurer = new DefaultMapReduceConfigurer(mapReduce);
mapReduce.configure(configurer);
MapReduceSpecification spec = configurer.createSpecification();
mapReduces.put(spec.getName(), spec);
}
