9c7036ff4e
This patch adds shard management capability to the queues mongodb driver. The storage API is also correctly split into an control and data interfaces. The data drivers are loaded by default. The control drivers are loaded as needed by the transport layer. Unit tests are also provided to verify that the driver (and future drivers) work as expected. Change-Id: Iad034a429a763c9a2ce161f05c928b090ab58944 Partially-implements: blueprint storage-sharding Partially-Closes: 1241686
44 lines
1.4 KiB
Python
44 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 exceptions
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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):
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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 'queues:drivers' group.
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"""
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try:
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mgr = driver.DriverManager('marconi.queues.data.storage',
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conf['queues: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 exceptions.InvalidDriver(exc)
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