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from . import interfaces
import tuned.logs
import pickle
import os
import tuned.consts as consts
log = tuned.logs.get()
class PickleProvider(interfaces.Provider):
__slots__ = ["_path", "_data"]
def __init__(self, path=None):
if path is None:
path = consts.DEFAULT_STORAGE_FILE
self._path = path
self._data = {}
def set(self, namespace, option, value):
self._data.setdefault(namespace, {})
self._data[namespace][option] = value
def get(self, namespace, option, default=None):
self._data.setdefault(namespace, {})
return self._data[namespace].get(option, default)
def unset(self, namespace, option):
self._data.setdefault(namespace, {})
if option in self._data[namespace]:
del self._data[namespace][option]
def save(self):
try:
log.debug("Saving %s" % str(self._data))
with open(self._path, "wb") as f:
pickle.dump(self._data, f)
except (OSError, IOError) as e:
log.error("Error saving storage file '%s': %s" % (self._path, e))
def load(self):
try:
with open(self._path, "rb") as f:
self._data = pickle.load(f)
except (OSError, IOError) as e:
log.debug("Error loading storage file '%s': %s" % (self._path, e))
self._data = {}
except EOFError:
self._data = {}
def clear(self):
self._data.clear()
try:
os.unlink(self._path)
except (OSError, IOError) as e:
log.debug("Error removing storage file '%s': %s" % (self._path, e))