def __init__(self,
cache,
name,
columns=1,
keys=1,
timeout=0,
modified=0,
restricted=False):
if not self.IsValidName(name):
raise exceptions.CacheTableNameInvalid(
'Invalid cache table name [{}] in cache [{}].'.format(
name, cache.name))
self._cache = cache
self.name = name
self.restricted = restricted
self.modified = modified
self.changed = False
self.timeout = timeout or 0
self.columns = columns
self.keys = keys
# Determine is the table has expired once at initialization time. We expect
# callers to keep cache or table objects open for a few seconds at most.
# Given that it doesn't make sense to do a few operations in that window
# only to have the last one expire.
if timeout and modified and (modified + timeout) < Now():
self.Invalidate()
def EncodeName(cls, name):
r"""Returns name encoded for file system path compatibility.
A table name may be a file name. alnum and '_.-' are not encoded.
Args:
name: The cache name string to encode.
Raises:
CacheTableNameInvalid: For invalid table names.
Returns:
Name encoded for portability.
"""
if not name:
raise exceptions.CacheTableNameInvalid(
'Cache table name [{}] is invalid.'.format(name))
return six.moves.urllib.parse.quote(name, '!@+,')
