@classmethod
  def get_by_job_id(cls, mapreduce_id):
    return db.get(cls.get_key_by_job_id(mapreduce_id))
Retrieves the instance of state for a Job.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/model.py/MapreduceState.get_by_job_id