def load(self):
""" Load caches from specified file """
# Nothing to do when persistent caching is off
if not self._filename or get_cache_level() < config.CACHE_PERSISTENT:
return
# Load the saved cache from file
try:
log.debug("Loading persistent cache from {0}".format(
self._filename))
input_file = gzip.open(self._filename, 'rb')
data = pickle.load(input_file)
input_file.close()
except EOFError:
log.cache("Cache file empty, will fill it upon exit")
return
except (IOError, zlib.error), error:
if getattr(error, "errno", None) == 2:
log.warn("Cache file not found, will create one on exit")
return
else:
log.error("Failed to load the cache ({0})".format(error))
log.warn("Going on but switching to the CACHE_OBJECTS level")
set_cache_level(config.CACHE_OBJECTS)
self.unlock()
return
def _fetch(self, inset=None):
""" Fetch currently linked test cases from the server """
# If data initialized from the inset ---> we're done
if Container._fetch(self, inset):
return
# Initialize all plan-case tags (skip when caching persistently
# as this an additional/unnecessary call in that case)
if config.get_cache_level() == config.CACHE_OBJECTS:
log.info("Fetching tags for all {0}'s test cases".format(self._object.identifier))
for tag in self._server.TestPlan.get_all_cases_tags(self.id):
Tag(tag)
# Fetch test cases from the server
log.info("Fetching {0}'s cases".format(self._identifier))
injects = self._server.TestPlan.get_test_cases(self.id)
log.data("Fetched {0}".format(listed(injects, "inject")))
self._current = set([TestCase(inject) for inject in injects])
self._original = set(self._current)
# Initialize case plans if not already cached
if not PlanCasePlans._is_cached(self._object.caseplans):
inset = [
CasePlan(
{
# Fake our own internal id from testplan & testcase
"id": _idify([self._object.id, inject["case_id"]]),
"case_id": inject["case_id"],
"plan_id": self._object.id,
"sortkey": inject["sortkey"],
}
)
for inject in injects
]
self._object.caseplans._fetch(inset)
def save(self):
""" Save caches to specified file """
# Nothing to do when persistent caching is off
if not self._filename or get_cache_level() < config.CACHE_PERSISTENT:
return
# Clear expired items and gather all caches into a single object
self.expire()
log.cache("Cache dump stats:\n" + self.stats().strip())
data = {}
for current_class in self._classes:
# Put container classes into id-sleep
if issubclass(current_class, containers.Container):
for container in current_class._cache.values():
container._sleep()
data[current_class.__name__] = current_class._cache
# Dump the cache object into file
try:
# Use temporary file to minimize the time during which
# the real cache is inconsistent
output_file = tempfile.NamedTemporaryFile(
mode="wb", delete=False, prefix="nitrate-cache.",
dir=os.path.dirname(self._filename))
log.cache("Temporary cache file: {0}".format(output_file.name))
output_file = gzip.open(output_file.name, "wb")
log.debug("Saving persistent cache into {0}".format(
self._filename))
pickle.dump(data, output_file)
output_file.close()
os.rename(output_file.name, self._filename)
log.debug("Persistent cache successfully saved")
except IOError as error:
log.error("Failed to save persistent cache ({0})".format(error))
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(Nitrate, cls).__new__(cls)
# Make sure that cache has been initialized
Cache()
# 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(Nitrate, cls).__new__(cls)
if isinstance(id, int):
log.cache("Caching {0} ID#{1}".format(cls.__name__, id))
cls._cache[id] = new
elif isinstance(id, six.string_types) or "name" in kwargs:
log.cache("Caching {0} '{1}'".format(
cls.__name__, (id or kwargs.get("name"))))
return new
def save(self):
""" Save caches to specified file """
# Nothing to do when persistent caching is off
if not self._filename or get_cache_level() < config.CACHE_PERSISTENT:
return
# Clear expired items and gather all caches into a single object
self.expire()
log.cache("Cache dump stats:\n" + self.stats().strip())
data = {}
for current_class in self._classes:
# Put container classes into id-sleep
if issubclass(current_class, containers.Container):
for container in current_class._cache.itervalues():
container._sleep()
data[current_class.__name__] = current_class._cache
# Dump the cache object into file
try:
# Use temporary file to minimize the time during which
# the real cache is inconsistent
output_file = tempfile.NamedTemporaryFile(
mode="wb", delete=False, prefix="nitrate-cache.",
dir=os.path.dirname(self._filename))
log.cache("Temporary cache file: {0}".format(output_file.name))
output_file = gzip.open(output_file.name, "wb")
log.debug("Saving persistent cache into {0}".format(
self._filename))
pickle.dump(data, output_file)
output_file.close()
os.rename(output_file.name, self._filename)
log.debug("Persistent cache successfully saved")
except IOError, error:
log.error("Failed to save persistent cache ({0})".format(error))
def _fetch(self, inset=None):
""" Fetch currently linked test cases from the server """
# If data initialized from the inset ---> we're done
if Container._fetch(self, inset):
return
# Initialize all plan-case tags (skip when caching persistently
# as this an additional/unnecessary call in that case)
if config.get_cache_level() == config.CACHE_OBJECTS:
log.info("Fetching tags for all {0}'s test cases".format(
self._object.identifier))
for tag in self._server.TestPlan.get_all_cases_tags(self.id):
Tag(tag)
# Fetch test cases from the server
log.info("Fetching {0}'s cases".format(self._identifier))
injects = self._server.TestPlan.get_test_cases(self.id)
log.data("Fetched {0}".format(listed(injects, "inject")))
self._current = set([TestCase(inject) for inject in injects])
self._original = set(self._current)
# Initialize case plans if not already cached
if not PlanCasePlans._is_cached(self._object.caseplans):
inset = [
CasePlan({
# Fake our own internal id from testplan & testcase
"id": _idify([self._object.id, inject["case_id"]]),
"case_id": inject["case_id"],
"plan_id": self._object.id,
"sortkey": inject["sortkey"]
}) for inject in injects
]
self._object.caseplans._fetch(inset)
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(Nitrate, cls).__new__(cls)
# Make sure that cache has been initialized
Cache()
# 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(Nitrate, cls).__new__(cls)
if isinstance(id, int):
log.cache("Caching {0} ID#{1}".format(cls.__name__, id))
cls._cache[id] = new
elif isinstance(id, basestring) or "name" in kwargs:
log.cache("Caching {0} '{1}'".format(
cls.__name__, (id or kwargs.get("name"))))
return new
def enter(self, filename=None):
""" Perform setup, create lock, load the cache """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Setup the cache
self.setup(filename)
# Create the lock and load the cache
self.lock()
self.load()
def enter(self, filename=None):
""" Perform setup, create lock, load the cache """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Setup the cache
self.setup(filename)
# Create the lock and load the cache
self.lock()
self.load()
def load(self):
""" Load caches from specified file """
# Nothing to do when persistent caching is off
if not self._filename or get_cache_level() < config.CACHE_PERSISTENT:
return
# Load the saved cache from file
try:
log.debug("Loading persistent cache from {0}".format(
self._filename))
input_file = gzip.open(self._filename, 'rb')
data = pickle.load(input_file)
input_file.close()
except EOFError:
log.cache("Cache file empty, will fill it upon exit")
return
except (IOError, zlib.error) as error:
if getattr(error, "errno", None) == 2:
log.warn("Cache file not found, will create one on exit")
return
else:
log.error("Failed to load the cache ({0})".format(error))
log.warn("Going on but switching to the CACHE_OBJECTS level")
set_cache_level(config.CACHE_OBJECTS)
self.unlock()
return
# Restore cache for immutable & mutable classes first
for current_class in self._immutable + self._mutable:
try:
log.cache("Loading cache for {0}".format(
current_class.__name__))
current_class._cache = data[current_class.__name__]
except KeyError:
log.cache("Failed to load cache for {0}, starting "
"with empty".format(current_class.__name__))
current_class._cache = {}
# Containers to be loaded last (to prevent object duplicates)
for current_class in self._containers:
try:
log.cache("Loading cache for {0}".format(
current_class.__name__))
current_class._cache = data[current_class.__name__]
except KeyError:
log.cache("Failed to load cache for {0}, starting "
"with empty".format(current_class.__name__))
current_class._cache = {}
# Wake up container objects from the id-sleep
for container in current_class._cache.itervalues():
container._wake()
# Clear expired items and give a short summary for debugging
self.expire()
log.cache("Cache restore stats:\n" + self.stats().strip())
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 NitrateNone:
self.__class__._cache[self._id] = self
# Index each given key
for key in keys:
self.__class__._cache[key] = self
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 NitrateNone:
self.__class__._cache[self._id] = self
# Index each given key
for key in keys:
self.__class__._cache[key] = self
def load(self):
""" Load caches from specified file """
# Nothing to do when persistent caching is off
if not self._filename or get_cache_level() < config.CACHE_PERSISTENT:
return
# Load the saved cache from file
try:
log.debug("Loading persistent cache from {0}".format(
self._filename))
input_file = gzip.open(self._filename, 'rb')
data = pickle.load(input_file)
input_file.close()
except EOFError:
log.cache("Cache file empty, will fill it upon exit")
return
except (IOError, zlib.error) as error:
if getattr(error, "errno", None) == 2:
log.warn("Cache file not found, will create one on exit")
return
else:
log.error("Failed to load the cache ({0})".format(error))
log.warn("Going on but switching to the CACHE_OBJECTS level")
set_cache_level(config.CACHE_OBJECTS)
self.unlock()
return
# Restore cache for immutable & mutable classes first
for current_class in self._immutable + self._mutable:
try:
log.cache("Loading cache for {0}".format(
current_class.__name__))
current_class._cache = data[current_class.__name__]
except KeyError:
log.cache("Failed to load cache for {0}, starting "
"with empty".format(current_class.__name__))
current_class._cache = {}
# Containers to be loaded last (to prevent object duplicates)
for current_class in self._containers:
try:
log.cache("Loading cache for {0}".format(
current_class.__name__))
current_class._cache = data[current_class.__name__]
except KeyError:
log.cache("Failed to load cache for {0}, starting "
"with empty".format(current_class.__name__))
current_class._cache = {}
# Wake up container objects from the id-sleep
for container in current_class._cache.values():
container._wake()
# Clear expired items and give a short summary for debugging
self.expire()
log.cache("Cache restore stats:\n" + self.stats().strip())
def exit(self):
""" Save the cache and remove the lock """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Skip cache save in read-only mode
if self._mode == "read-only":
log.cache("Skipping persistent cache save in read-only mode")
return
# Save the cache and remove the lock
self.save()
self.unlock()
def exit(self):
""" Save the cache and remove the lock """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Skip cache save in read-only mode
if self._mode == "read-only":
log.cache("Skipping persistent cache save in read-only mode")
return
# Save the cache and remove the lock
self.save()
self.unlock()
def _fetch(self, inset=None):
""" Save cache timestamp and initialize from inset if given """
Nitrate._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 setter(self, value):
# Initialize the attribute unless already done
if getattr(self, "_" + field) is NitrateNone:
self._fetch()
# Update only if changed
if getattr(self, "_" + field) != value:
setattr(self, "_" + field, value)
log.info(u"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 setter(self, value):
# Initialize the attribute unless already done
if getattr(self, "_" + field) is NitrateNone:
self._fetch()
# Update only if changed
if getattr(self, "_" + field) != value:
setattr(self, "_" + field, value)
log.info(u"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 """
Nitrate._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 setup(self, filename=None):
""" Set cache filename and initialize expiration times """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Detect cache filename, argument first, then config
if filename is not None:
self._filename = filename
else:
try:
self._filename = config.Config().cache.file
except AttributeError:
log.warn("Persistent caching off "
"(cache filename not found in the config)")
self._lock = "{0}.lock".format(self._filename)
# Initialize user-defined expiration times from the config
for klass in self._classes + [
Nitrate, mutable.Mutable, containers.Container
]:
try:
expiration = getattr(config.Config().expiration,
klass.__name__.lower())
except AttributeError:
continue
# Convert from seconds, handle special values
if isinstance(expiration, int):
expiration = datetime.timedelta(seconds=expiration)
elif expiration == "NEVER_EXPIRE":
expiration = config.NEVER_EXPIRE
elif expiration == "NEVER_CACHE":
expiration = config.NEVER_CACHE
# Give warning for invalid expiration values
if isinstance(expiration, datetime.timedelta):
klass._expiration = expiration
log.debug("User defined expiration for {0}: {1}".format(
klass.__name__, expiration))
else:
log.warn("Invalid expiration time '{0}'".format(expiration))
def setup(self, filename=None):
""" Set cache filename and initialize expiration times """
# Nothing to do when persistent caching is off
if get_cache_level() < config.CACHE_PERSISTENT:
return
# Detect cache filename, argument first, then config
if filename is not None:
self._filename = filename
else:
try:
self._filename = config.Config().cache.file
except AttributeError:
log.warn("Persistent caching off "
"(cache filename not found in the config)")
self._lock = "{0}.lock".format(self._filename)
# Initialize user-defined expiration times from the config
for klass in self._classes + [Nitrate, mutable.Mutable,
containers.Container]:
try:
expiration = getattr(
config.Config().expiration, klass.__name__.lower())
except AttributeError:
continue
# Convert from seconds, handle special values
if isinstance(expiration, int):
expiration = datetime.timedelta(seconds=expiration)
elif expiration == "NEVER_EXPIRE":
expiration = config.NEVER_EXPIRE
elif expiration == "NEVER_CACHE":
expiration = config.NEVER_CACHE
# Give warning for invalid expiration values
if isinstance(expiration, datetime.timedelta):
klass._expiration = expiration
log.debug("User defined expiration for {0}: {1}".format(
klass.__name__, expiration))
else:
log.warn("Invalid expiration time '{0}'".format(expiration))
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 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()
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()
