46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
# Copyright (c) 2013 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from stevedore import driver
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from marconi.common import errors
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from marconi.openstack.common import log
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LOG = log.getLogger(__name__)
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def load_storage_driver(conf, control_mode=False):
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"""Loads a storage driver and returns it.
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The driver's initializer will be passed conf as its only arg.
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:param conf: Configuration instance to use for loading the
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driver. Must include a 'drivers' group.
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"""
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mode = 'control' if control_mode else 'data'
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driver_type = 'marconi.queues.{0}.storage'.format(mode)
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try:
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mgr = driver.DriverManager(driver_type,
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conf['drivers'].storage,
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invoke_on_load=True,
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invoke_args=[conf])
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return mgr.driver
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except RuntimeError as exc:
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LOG.exception(exc)
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raise errors.InvalidDriver(exc)
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