56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
# Copyright 2015 Red Hat, Inc.
|
|
#
|
|
# 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.
|
|
|
|
import logging
|
|
import os
|
|
|
|
from dogpile.cache.region import make_region
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class Cache(object):
|
|
|
|
def __init__(self, cachedir, enabled=True):
|
|
if enabled:
|
|
backend = 'dogpile.cache.dbm'
|
|
cache_dir = self._get_cache_dir(cachedir)
|
|
filename = os.path.join(cache_dir, 'cache.dbm')
|
|
LOG.debug('Using cache: %s' % filename)
|
|
arguments = {
|
|
'filename': filename,
|
|
}
|
|
else:
|
|
backend = 'dogpile.cache.null'
|
|
arguments = {}
|
|
self.region = make_region().configure(backend, arguments=arguments)
|
|
|
|
def get(self, title):
|
|
res = self.region.get(title)
|
|
return res if res else None
|
|
|
|
def has_changed(self, title, md5):
|
|
if self.get(title) == md5:
|
|
return False
|
|
return True
|
|
|
|
def set(self, title, md5):
|
|
self.region.set(title, md5)
|
|
|
|
def _get_cache_dir(self, cachedir):
|
|
path = os.path.expanduser(cachedir)
|
|
if not os.path.isdir(path):
|
|
os.makedirs(path)
|
|
return path
|