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# Copyright: 2005 Gentoo Foundation
# Author(s): Brian Harring (ferringb@gentoo.org)
# License: GPL2
# $Id$
anydbm_module = __import__("anydbm")
try:
import cPickle as pickle
except ImportError:
import pickle
import os
import fs_template
import cache_errors
class database(fs_template.FsBased):
autocommits = True
cleanse_keys = True
serialize_eclasses = False
def __init__(self, *args, **config):
super(database,self).__init__(*args, **config)
default_db = config.get("dbtype","anydbm")
if not default_db.startswith("."):
default_db = '.' + default_db
self._db_path = os.path.join(self.location, fs_template.gen_label(self.location, self.label)+default_db)
self.__db = None
try:
self.__db = anydbm_module.open(self._db_path, "w", self._perms)
except anydbm_module.error:
# XXX handle this at some point
try:
self._ensure_dirs()
self._ensure_dirs(self._db_path)
except (OSError, IOError), e:
raise cache_errors.InitializationError(self.__class__, e)
# try again if failed
try:
if self.__db == None:
self.__db = anydbm_module.open(self._db_path, "c", self._perms)
except anydbm_module.error, e:
raise cache_errors.InitializationError(self.__class__, e)
self._ensure_access(self._db_path)
def iteritems(self):
return self.__db.iteritems()
def _getitem(self, cpv):
# we override getitem because it's just a cpickling of the data handed in.
return pickle.loads(self.__db[cpv])
def _setitem(self, cpv, values):
self.__db[cpv] = pickle.dumps(values,pickle.HIGHEST_PROTOCOL)
def _delitem(self, cpv):
del self.__db[cpv]
def iterkeys(self):
return iter(self.__db.keys())
def has_key(self, cpv):
return cpv in self.__db
def __del__(self):
if "__db" in self.__dict__ and self.__db != None:
self.__db.sync()
self.__db.close()
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