6f5896c8bd
To provide a standard way to fetch jobboards that doesn't require importing the modules themselves but by using entrypoints instead. Blueprint jobboard-entrypoints Change-Id: I13639c6be78a5d003e50e6cfd452c7b810072006
46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014 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 logging
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import six
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from stevedore import driver
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from taskflow import exceptions as exc
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# NOTE(harlowja): this is the entrypoint namespace, not the module namespace.
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BACKEND_NAMESPACE = 'taskflow.jobboards'
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LOG = logging.getLogger(__name__)
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def fetch(name, conf, namespace=BACKEND_NAMESPACE, **kwargs):
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# NOTE(harlowja): this allows simpler syntax.
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if isinstance(conf, six.string_types):
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conf = {'board': conf}
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board = conf['board']
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LOG.debug('Looking for %r jobboard driver in %r', board, namespace)
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try:
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mgr = driver.DriverManager(namespace, board,
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invoke_on_load=True,
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invoke_args=(name, conf),
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invoke_kwds=kwargs)
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return mgr.driver
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except RuntimeError as e:
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raise exc.NotFound("Could not find jobboard %s" % (board), e)
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