def __init__(self, cache_dir, policies, hash_algo):
"""
Arguments:
cache_dir: directory where to place the cache.
policies: cache retention policies.
algo: hashing algorithm used.
"""
super(DiskCache, self).__init__()
self.cache_dir = cache_dir
self.policies = policies
self.hash_algo = hash_algo
self.state_file = os.path.join(cache_dir, self.STATE_FILE)
# All protected methods (starting with '_') except _path should be called
# with this lock locked.
self._lock = threading_utils.LockWithAssert()
self._lru = lru.LRUDict()
# Profiling values.
self._added = []
self._removed = []
self._free_disk = 0
with tools.Profiler('Setup'):
with self._lock:
self._load()
def __init__(self, cache_dir):
if cache_dir is not None:
assert isinstance(cache_dir, unicode), cache_dir
assert file_path.isabs(cache_dir), cache_dir
self.cache_dir = cache_dir
self._lock = threading_utils.LockWithAssert()
# Profiling values.
self._added = []
self._used = []
def __init__(self, root_dir):
"""Initializes NamedCaches.
|root_dir| is a directory for persistent cache storage.
"""
assert file_path.isabs(root_dir), root_dir
self.root_dir = unicode(root_dir)
self._lock = threading_utils.LockWithAssert()
# LRU {cache_name -> cache_location}
# It is saved to |root_dir|/state.json.
self._lru = None