0885397d10
Initial PoC source code for Tricircle, the project for OpenStack cascading solution. Change-Id: I8abc93839a26446cb61c8d9004dfd812bd91de6e
64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
# Copyright (c) 2014 OpenStack Foundation.
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# 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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#
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# @author: Jia Dong, HuaWei
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"""Base class for all storage backends"""
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from oslo.config import cfg
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from stevedore import extension
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from glance.common import exception
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import glance.openstack.common.log as logging
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from glance.openstack.common.gettextutils import _
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from glance.openstack.common import importutils
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from glance.openstack.common import strutils
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LOG = logging.getLogger(__name__)
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class StoreFactory(object):
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SYNC_STORE_NAMESPACE = "glance.sync.store.driver"
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def __init__(self):
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self._stores = {}
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self._load_store_drivers()
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def _load_store_drivers(self):
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extension_manager = extension.ExtensionManager(
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namespace=self.SYNC_STORE_NAMESPACE,
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invoke_on_load=True,
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)
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for ext in extension_manager:
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if ext.name in self._stores:
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continue
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ext.obj.name = ext.name
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self._stores[ext.name] = ext.obj
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def get_instance(self, from_scheme='filesystem', to_scheme=None):
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_store_driver = self._stores.get(from_scheme)
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if to_scheme and to_scheme != from_scheme and _store_driver:
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func_name = 'copy_to_%s' % to_scheme
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if not getattr(_store_driver, func_name, None):
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return None
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return _store_driver
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class Store(object):
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def copy_to(self, source_location, dest_location, candidate_path=None):
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pass
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