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# Copyright 2021 Catalyst Cloud
#
# 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.
"""The code related to integration between oslo.cache module and trove."""
from oslo_cache import core
from oslo_config import cfg
PORTS_CACHE_GROUP = cfg.OptGroup('instance_ports_cache')
PORTS_CACHE_OPTS = [
cfg.IntOpt('expiration_time', default=86400,
help='TTL, in seconds, for any cached item in the '
'dogpile.cache region used for caching of the '
'instance ports.'),
cfg.BoolOpt("caching", default=True,
help='Toggle to enable/disable caching when getting trove '
'instance ports. Please note that the global toggle '
'for oslo.cache(enabled=True in [cache] group) '
'must be enabled to use this feature.')
]
def register_cache_configurations(conf):
"""Register all configurations required for oslo.cache.
The procedure registers all configurations required for oslo.cache.
It should be called before configuring of cache region
"""
core.configure(conf)
conf.register_group(PORTS_CACHE_GROUP)
conf.register_opts(PORTS_CACHE_OPTS, group=PORTS_CACHE_GROUP)
return conf
# variable that stores an initialized cache region for trove
_REGION = None
def get_cache_region():
global _REGION
if not _REGION:
_REGION = core.configure_cache_region(
conf=register_cache_configurations(cfg.CONF),
region=core.create_region())
return _REGION
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