50 lines
1.5 KiB
Python
50 lines
1.5 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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class Promise(object):
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"""This is an abstraction of a promise to perform some type of job which
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can be returned to a user/function... for later lookup on the progress of
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the underlying job."""
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__metaclass__ = abc.ABCMeta
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def __init__(self, job):
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self._job = job
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@property
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def tracking_id(self):
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return "p-%s" % (self._job.tracking_id)
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def await(self, timeout=None):
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"""Attempts to wait until the job fails or finishess."""
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raise NotImplementedError()
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@abc.abstractproperty
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def state(self):
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"""Returns the state of the underlying job."""
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raise NotImplementedError()
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@abc.abstractproperty
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def owner(self):
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"""Returns the owner of the job, or None if no owner
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has been assigned."""
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raise NotImplementedError()
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