def __new__(cls, id=None, *args, **kwargs):
""" Create a new object, handle caching if enabled """
# No caching when turned of or class does not support it
if (config.get_cache_level() < config.CACHE_OBJECTS
or getattr(cls, "_cache", None) is None):
return super(TCMS, cls).__new__(cls)
# Look up cached object by id (or other arguments in kwargs)
try:
# If found, we get instance and key by which it was found
instance, key = cls._cache_lookup(id, **kwargs)
if isinstance(key, int):
log.cache("Using cached {0} ID#{1}".format(cls.__name__, key))
else:
log.cache("Using cached {0} '{1}'".format(cls.__name__, key))
return instance
# Object not cached yet, create a new one and cache it
except KeyError:
new = super(TCMS, cls).__new__(cls)
if isinstance(id, int):
log.cache("Caching {0} ID#{1}".format(cls.__name__, id))
cls._cache[id] = new
elif isinstance(id, str) or "name" in kwargs:
log.cache("Caching {0} '{1}'".format(
cls.__name__, (id or kwargs.get("name"))))
return new
def _index(self, *keys):
""" Index self into the class cache if caching enabled """
# Skip indexing completely when caching off
if config.get_cache_level() < config.CACHE_OBJECTS:
return
# Index by ID
if self._id is not TCMSNone:
self.__class__._cache[self._id] = self
# Index each given key
for key in keys:
self.__class__._cache[key] = self
def setter(self, value):
# Initialize the attribute unless already done
if getattr(self, "_" + field) is TCMSNone:
self._fetch()
# Update only if changed
if getattr(self, "_" + field) != value:
setattr(self, "_" + field, value)
log.info("Updating {0}'s {1} to '{2}'".format(
self.identifier, field, value))
# Remember modified state if caching
if config.get_cache_level() != config.CACHE_NONE:
self._modified = True
# Save the changes immediately otherwise
else:
self._update()
def _fetch(self, inset=None):
""" Save cache timestamp and initialize from inset if given """
TCMS._fetch(self)
# Create copies of the initial set (if given)
if inset is not None:
log.debug("Initializing {0} for {1} from the inset".format(
self.__class__.__name__, self._identifier))
log.debug(pretty(inset))
self._current = set(inset)
self._original = set(inset)
# cache into container class
if config.get_cache_level() >= config.CACHE_OBJECTS:
self.__class__._cache[self._id] = self
# Return True if the data are already initialized
return inset is not None
def remove(self, items):
""" Remove an item or a list of items from the container """
# Convert to set representation
if isinstance(items, list):
items = set(items)
else:
items = set([items])
# If there are any items to be removed
remove_items = items.intersection(self._items)
if remove_items:
log.info("Removing {0} from {1}'s {2}".format(
listed([item.identifier for item in remove_items],
self._class.__name__,
max=10), self._object.identifier,
self.__class__.__name__))
self._items.difference_update(items)
if config.get_cache_level() != config.CACHE_NONE:
self._modified = True
else:
self._update()
def add(self, items):
""" Add an item or a list of items to the container """
# Convert to set representation
if isinstance(items, list):
items = set(items)
else:
items = set([items])
# If there are any new items
add_items = items - self._items
if add_items:
log.info("Adding {0} to {1}'s {2}".format(
listed([item.identifier for item in add_items],
self._class.__name__,
max=10), self._object.identifier,
self.__class__.__name__))
self._items.update(items)
if config.get_cache_level() != config.CACHE_NONE:
self._modified = True
else:
self._update()
