60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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CLAIMED = 'claimed'
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UNCLAIMED = 'unclaimed'
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class Job(object):
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__metaclass__ = abc.ABCMeta
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def __init__(self, name, type, reservation):
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self.name = name
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# A link back to the reservation which
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# can be used to query information about
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# this job (and its subsequent
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# workflows and tasks).
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self.reservation = reservation
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# TBD - likely more details about this job
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self.details = None
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self.state = UNCLAIMED
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self.owner = None
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@abc.abstractproperty
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def type(self):
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# Returns which type of job this is.
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#
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# For example, a 'run_instance' job, or a 'delete_instance' job could
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# be possible types.
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raise NotImplementedError()
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@abc.abstractmethod
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def claim(self, owner):
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# This can be used to transition this job from unclaimed to claimed.
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raise NotImplementedError()
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@abc.abstractmethod
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def consume(self):
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# This can be used to transition this job from active to finished.
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#
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# During said transition the job and any details of it may be removed
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# from some backing storage (if applicable).
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raise NotImplementedError()
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