[server/session] Roll back in connection exit
This was changed in commit 8b35a898b334 "[server] remove cnxset
tracking, it is now unneeded".
When exiting a CubicWeb Connection, the database connection is put back
into the common pool. At that point anything done during the lifetime
of the CubicWeb Connection needs to be committed or rolled back.
Do a proper rollback to finish the transaction, as was happening before
the above-mentionned commit.
This showed up on testing with postgresql, when a DB schema modification
was blocked by an old connection that was still "in transaction".
# 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
try:
from cubicweb.web.request import _NeedAuthAccessMock
except ImportError:
_NeedAuthAccessMock = None
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,
)
if _NeedAuthAccessMock is not None:
IGNORE_CLASSES = IGNORE_CLASSES + (_NeedAuthAccessMock,)
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)
garbage = [repr(obj) for obj in gc.garbage]
return counters, ocounters, 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