Bring back the separate web-side entity cache
Prior to changeset 635cfac73d28 "[repoapi] fold ClientConnection into
Connection", we had two entity caches: one on the client/dbapi/web side,
and one on the server/repo side. This is a waste, but it is actually
needed as long as we have the magic _cw attribute on entities which must
sometimes be a request and sometimes a cnx. Removing the duplication
caused weird problems with entity._cw alternating between both types of
objects, which is unexpected by both the repo and the web sides.
We add an entity cache on ConnectionCubicWebRequestBase, separate from
the Connection's, and bring back the
_cw_update_attr_cache/dont-cache-attrs mechanism, to let the
server/edition code let caches know which attributes have been modified
Entity.as_rset can be cached again, as ResultSet no longer modifies the
entity when fetching it from a cache.
Contrary to the pre-3.21 code, _cw_update_attr_cache now handles web
requests and connections in the same way (otherwise the cache ends up
with wrong values if a hook modifies attributes), but dont-cache-attrs
is never set for (inlined) relations.
Closes #6863543
# copyright 2013-2014 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/>.
"""Official API to access the content of a repository
"""
from warnings import warn
from six import add_metaclass
from logilab.common.deprecation import class_deprecated
from cubicweb.utils import parse_repo_uri
from cubicweb import AuthenticationError
from cubicweb.server.session import Connection
### public API ######################################################
def get_repository(uri=None, config=None, vreg=None):
"""get a repository for the given URI or config/vregistry (in case we're
loading the repository for a client, eg web server, configuration).
The returned repository may be an in-memory repository or a proxy object
using a specific RPC method, depending on the given URI.
"""
if uri is not None:
warn('[3.22] get_repository only wants a config')
assert config is not None, 'get_repository(config=config)'
return config.repository(vreg)
def connect(repo, login, **kwargs):
"""Take credential and return associated Connection.
raise AuthenticationError if the credential are invalid."""
sessionid = repo.connect(login, **kwargs)
session = repo._get_session(sessionid)
# XXX the autoclose_session should probably be handle on the session directly
# this is something to consider once we have proper server side Connection.
return Connection(session)
def anonymous_cnx(repo):
"""return a Connection for Anonymous user.
raises an AuthenticationError if anonymous usage is not allowed
"""
anoninfo = getattr(repo.config, 'anonymous_user', lambda: None)()
if anoninfo is None: # no anonymous user
raise AuthenticationError('anonymous access is not authorized')
anon_login, anon_password = anoninfo
# use vreg's repository cache
return connect(repo, anon_login, password=anon_password)
@add_metaclass(class_deprecated)
class ClientConnection(Connection):
__deprecation_warning__ = '[3.20] %(cls)s is deprecated, use Connection instead'