55   """

    55   """

    56 

    56 

    57   def __init__(self):

    57   def __init__(self):

    58     """Constructs a new Handler with all known jobs set.

    58     """Constructs a new Handler with all known jobs set.

    59     """

    59     """

    61     self.OUT_OF_TIME = 0

    61     self.OUT_OF_TIME = 0

    62     self.ALREADY_CLAIMED = 1

    62     self.ALREADY_CLAIMED = 1

    63     self.SUCCESS = 2

    63     self.SUCCESS = 2

    64     self.ABORTED = 3

    64     self.ABORTED = 3

    65     self.ERRORED = 4

    65     self.ERRORED = 4

    85     if job.status != 'waiting':

    85     if job.status != 'waiting':

    86       raise db.Rollback()

    86       raise db.Rollback()

    87 

    87 

    88     job.status = 'started'

    88     job.status = 'started'

    89 

    89 

    90     if job.put():

    91     if job.put():

    91       return job

    92       return job

    92     else:

    93     else:

    93       return None

    94       return None

    94 

    95