mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-28 10:38:26 +00:00
122 lines
3.9 KiB
Python
122 lines
3.9 KiB
Python
from beaker._compat import pickle
|
|
|
|
import logging
|
|
from datetime import datetime
|
|
|
|
from beaker.container import OpenResourceNamespaceManager, Container
|
|
from beaker.exceptions import InvalidCacheBackendError
|
|
from beaker.synchronization import null_synchronizer
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
db = None
|
|
|
|
|
|
class GoogleNamespaceManager(OpenResourceNamespaceManager):
|
|
tables = {}
|
|
|
|
@classmethod
|
|
def _init_dependencies(cls):
|
|
global db
|
|
if db is not None:
|
|
return
|
|
try:
|
|
db = __import__('google.appengine.ext.db').appengine.ext.db
|
|
except ImportError:
|
|
raise InvalidCacheBackendError("Datastore cache backend requires the "
|
|
"'google.appengine.ext' library")
|
|
|
|
def __init__(self, namespace, table_name='beaker_cache', **params):
|
|
"""Creates a datastore namespace manager"""
|
|
OpenResourceNamespaceManager.__init__(self, namespace)
|
|
|
|
def make_cache():
|
|
table_dict = dict(created=db.DateTimeProperty(),
|
|
accessed=db.DateTimeProperty(),
|
|
data=db.BlobProperty())
|
|
table = type(table_name, (db.Model,), table_dict)
|
|
return table
|
|
self.table_name = table_name
|
|
self.cache = GoogleNamespaceManager.tables.setdefault(table_name, make_cache())
|
|
self.hash = {}
|
|
self._is_new = False
|
|
self.loaded = False
|
|
self.log_debug = logging.DEBUG >= log.getEffectiveLevel()
|
|
|
|
# Google wants namespaces to start with letters, change the namespace
|
|
# to start with a letter
|
|
self.namespace = 'p%s' % self.namespace
|
|
|
|
def get_access_lock(self):
|
|
return null_synchronizer()
|
|
|
|
def get_creation_lock(self, key):
|
|
# this is weird, should probably be present
|
|
return null_synchronizer()
|
|
|
|
def do_open(self, flags, replace):
|
|
# If we already loaded the data, don't bother loading it again
|
|
if self.loaded:
|
|
self.flags = flags
|
|
return
|
|
|
|
item = self.cache.get_by_key_name(self.namespace)
|
|
|
|
if not item:
|
|
self._is_new = True
|
|
self.hash = {}
|
|
else:
|
|
self._is_new = False
|
|
try:
|
|
self.hash = pickle.loads(str(item.data))
|
|
except (IOError, OSError, EOFError, pickle.PickleError):
|
|
if self.log_debug:
|
|
log.debug("Couln't load pickle data, creating new storage")
|
|
self.hash = {}
|
|
self._is_new = True
|
|
self.flags = flags
|
|
self.loaded = True
|
|
|
|
def do_close(self):
|
|
if self.flags is not None and (self.flags == 'c' or self.flags == 'w'):
|
|
if self._is_new:
|
|
item = self.cache(key_name=self.namespace)
|
|
item.data = pickle.dumps(self.hash)
|
|
item.created = datetime.now()
|
|
item.accessed = datetime.now()
|
|
item.put()
|
|
self._is_new = False
|
|
else:
|
|
item = self.cache.get_by_key_name(self.namespace)
|
|
item.data = pickle.dumps(self.hash)
|
|
item.accessed = datetime.now()
|
|
item.put()
|
|
self.flags = None
|
|
|
|
def do_remove(self):
|
|
item = self.cache.get_by_key_name(self.namespace)
|
|
item.delete()
|
|
self.hash = {}
|
|
|
|
# We can retain the fact that we did a load attempt, but since the
|
|
# file is gone this will be a new namespace should it be saved.
|
|
self._is_new = True
|
|
|
|
def __getitem__(self, key):
|
|
return self.hash[key]
|
|
|
|
def __contains__(self, key):
|
|
return key in self.hash
|
|
|
|
def __setitem__(self, key, value):
|
|
self.hash[key] = value
|
|
|
|
def __delitem__(self, key):
|
|
del self.hash[key]
|
|
|
|
def keys(self):
|
|
return self.hash.keys()
|
|
|
|
|
|
class GoogleContainer(Container):
|
|
namespace_class = GoogleNamespaceManager
|