59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
# Copyright 2014 Tesora, Inc.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
#
|
|
|
|
from oslo_log import log as logging
|
|
|
|
from trove.common import cfg
|
|
from trove.common.strategies.strategy import Strategy
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
CONF = cfg.CONF
|
|
|
|
|
|
__replication_instance = None
|
|
__replication_manager = None
|
|
__replication_namespace = None
|
|
__replication_strategy = None
|
|
|
|
|
|
def get_instance(manager):
|
|
global __replication_instance
|
|
global __replication_manager
|
|
global __replication_namespace
|
|
if not __replication_instance or manager != __replication_manager:
|
|
replication_strategy = get_strategy(manager)
|
|
__replication_namespace = CONF.get(manager).replication_namespace
|
|
replication_strategy_cls = get_strategy_cls(
|
|
replication_strategy, __replication_namespace)
|
|
__replication_instance = replication_strategy_cls()
|
|
__replication_manager = manager
|
|
LOG.debug('Replication instance from: %(namespace)s.%(strategy)s',
|
|
{'namespace': __replication_namespace,
|
|
'strategy': __replication_strategy})
|
|
return __replication_instance
|
|
|
|
|
|
def get_strategy(manager):
|
|
global __replication_strategy
|
|
if not __replication_strategy or manager != __replication_manager:
|
|
__replication_strategy = CONF.get(manager).replication_strategy
|
|
return __replication_strategy
|
|
|
|
|
|
def get_strategy_cls(replication_driver, ns=__name__):
|
|
return Strategy.get_strategy(replication_driver, ns)
|