def _initdb_con(self, config):
"""ensure needed tables are in place.
If the derived class needs a different set of table creation commands, overload the approriate
SCHEMA_ attributes. If it needs additional execution beyond, override"""
self._dbconnect(config)
if not self._table_exists(self.SCHEMA_PACKAGE_NAME):
if self.readonly:
raise cache_errors.ReadOnlyRestriction(
"table %s doesn't exist" % self.SCHEMA_PACKAGE_NAME
)
try:
self.con.execute(self.SCHEMA_PACKAGE_CREATE)
except self._BaseError as e:
raise cache_errors.InitializationError(self.__class__, e)
if not self._table_exists(self.SCHEMA_VALUES_NAME):
if self.readonly:
raise cache_errors.ReadOnlyRestriction(
"table %s doesn't exist" % self.SCHEMA_VALUES_NAME
)
try:
self.con.execute(self.SCHEMA_VALUES_CREATE)
except self._BaseError as e:
raise cache_errors.InitializationError(self.__class__, e)
def __setitem__(self, cpv, values):
"""set a cpv to values
This shouldn't be overriden in derived classes since it handles the readonly checks"""
if self.readonly:
raise cache_errors.ReadOnlyRestriction()
d = None
if self.cleanse_keys:
d = ProtectedDict(values)
for k, v in list(item for item in d.items()
if item[0] != "_eclasses_"):
if not v:
del d[k]
if "_eclasses_" in values:
if d is None:
d = ProtectedDict(values)
if self.serialize_eclasses:
d["_eclasses_"] = serialize_eclasses(
d["_eclasses_"],
self.validation_chf,
paths=self.store_eclass_paths)
else:
d["_eclasses_"] = self._internal_eclasses(
d["_eclasses_"], self.validation_chf,
self.store_eclass_paths)
elif d is None:
d = values
self._setitem(cpv, d)
if not self.autocommits:
self.updates += 1
if self.updates > self.sync_rate:
self.commit()
self.updates = 0
def __delitem__(self, cpv):
"""delete a key from the cache.
This shouldn't be overriden in derived classes since it handles the readonly checks"""
if self.readonly:
raise cache_errors.ReadOnlyRestriction()
if not self.autocommits:
self.updates += 1
self._delitem(cpv)
if self.updates > self.sync_rate:
self.commit()
self.updates = 0
def __setitem__(self, cpv, values):
"""set a cpv to values
This shouldn't be overriden in derived classes since it handles the readonly checks"""
if self.readonly:
raise cache_errors.ReadOnlyRestriction()
if self.cleanse_keys:
d = ProtectedDict(values)
for k, v in list(d.items()):
if not v:
del d[k]
if self.serialize_eclasses and "_eclasses_" in values:
d["_eclasses_"] = serialize_eclasses(d["_eclasses_"])
elif self.serialize_eclasses and "_eclasses_" in values:
d = ProtectedDict(values)
d["_eclasses_"] = serialize_eclasses(d["_eclasses_"])
else:
d = values
self._setitem(cpv, d)
if not self.autocommits:
self.updates += 1
if self.updates > self.sync_rate:
self.commit()
self.updates = 0
