'Compute single controller task name.
Args:
mapreduce_spec: specification of the mapreduce.
serial_id: id of the invocation as int.
Returns:
task name which should be used to process specified shard/slice.'

@staticmethod
def get_task_name(mapreduce_spec, serial_id):

    return ('appengine-mrcontrol-%s-%s' % (mapreduce_spec.mapreduce_id, serial_id))
