[repo creation] removing existing entities of 'single' cardinality relatino should be considered as 'activeintegrity' hook. Also don't disable that category during repo creation to avoid pb such as two default workflows for one entity types
import gc, types, weakref
from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema
listiterator = type(iter([]))
IGNORE_CLASSES = (
type, tuple, dict, list, set, frozenset, type(len),
weakref.ref, weakref.WeakKeyDictionary,
listiterator,
property, classmethod,
types.ModuleType, types.FunctionType, types.MethodType,
types.MemberDescriptorType, types.GetSetDescriptorType,
)
def _get_counted_class(obj, classes):
for cls in classes:
if isinstance(obj, cls):
return cls
raise AssertionError()
def gc_info(countclasses,
ignoreclasses=IGNORE_CLASSES,
viewreferrersclasses=(), showobjs=False, maxlevel=1):
gc.collect()
gc.collect()
counters = {}
ocounters = {}
for obj in gc.get_objects():
if isinstance(obj, countclasses):
cls = _get_counted_class(obj, countclasses)
try:
counters[cls.__name__] += 1
except KeyError:
counters[cls.__name__] = 1
elif not isinstance(obj, ignoreclasses):
try:
key = '%s.%s' % (obj.__class__.__module__,
obj.__class__.__name__)
except AttributeError:
key = str(obj)
try:
ocounters[key] += 1
except KeyError:
ocounters[key] = 1
if isinstance(obj, viewreferrersclasses):
print ' ', obj, referrers(obj, showobjs, maxlevel)
return counters, ocounters, gc.garbage
def referrers(obj, showobj=False, maxlevel=1):
objreferrers = _referrers(obj, maxlevel)
try:
return sorted(set((type(x), showobj and x or getattr(x, '__name__', '%#x' % id(x)))
for x in objreferrers))
except TypeError:
s = set()
unhashable = []
for x in objreferrers:
try:
s.add(x)
except TypeError:
unhashable.append(x)
return sorted(s) + unhashable
def _referrers(obj, maxlevel, _seen=None, _level=0):
interesting = []
if _seen is None:
_seen = set()
for x in gc.get_referrers(obj):
if id(x) in _seen:
continue
_seen.add(id(x))
if isinstance(x, types.FrameType):
continue
if isinstance(x, (CubicWebRelationSchema, CubicWebEntitySchema)):
continue
if isinstance(x, (list, tuple, set, dict, listiterator)):
if _level >= maxlevel:
pass
#interesting.append(x)
else:
interesting += _referrers(x, maxlevel, _seen, _level+1)
else:
interesting.append(x)
return interesting