first draft for a simple hooks based custom attribute storage,
with a BytesFileSystemStorage POC implementation.
Basically:
* a dictionary contains maps from which attribute of which entity types are
mapped to which custom storage
* hooks check for one of these entity type being added/modified/deleted
* read is based on the sql generator callback mecanism (used in vcsfile for
instance)
* all storages have the same basic interface (read, add, update, delete),
and should be pluggable in a transparent way (except at migration time
when one want to change from a storage to another)
* the sample BytesFileSystemStorage:
* may store Bytes attributes content of any entity type as file on the file system
* is based on one FSPATH rql/sql function and another _fsopen only available in sql
* has a dumb file name allocation algorithm
"""
:organization: Logilab
:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
from cubicweb.server.hook import Hook
CALLED_EVENTS = {}
class StartupHook(Hook):
__regid__ = 'mystartup'
events = ('server_startup',)
def __call__(self):
CALLED_EVENTS['server_startup'] = True
class ShutdownHook(Hook):
__regid__ = 'myshutdown'
events = ('server_shutdown',)
def __call__(self):
CALLED_EVENTS['server_shutdown'] = True
class LoginHook(Hook):
__regid__ = 'mylogin'
events = ('session_open',)
def __call__(self):
CALLED_EVENTS['session_open'] = self._cw.user.login
class LogoutHook(Hook):
__regid__ = 'mylogout'
events = ('session_close',)
def __call__(self):
CALLED_EVENTS['session_close'] = self._cw.user.login