[client-connection] add an auto-close property for ClientConnection
The next commit introduce a connect function that open a new Session and return
an associated ClientConnection. The Session should not be used by anything else
than the created ClientConnection, so we want to close it at the same time than
the ClientConnection. The implementation in this changeset is simplistic. We
probably want to move this notion in the session itself. This be improved once
we have server side Connection
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
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