# copyright 2003-2011 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/>.
"""Server subcube of cubicweb : defines objects used only on the server
(repository) side
The server module contains functions to initialize a new repository.
"""
from __future__ import with_statement
__docformat__ = "restructuredtext en"
import sys
from os.path import join, exists
from glob import glob
from logilab.common.modutils import LazyObject
from logilab.common.textutils import splitstrip
from yams import BASE_GROUPS
from cubicweb import CW_SOFTWARE_ROOT
class ShuttingDown(BaseException):
"""raised when trying to access some resources while the repository is
shutting down. Inherit from BaseException so that `except Exception` won't
catch it.
"""
# server-side debugging #########################################################
# server debugging flags. They may be combined using binary operators.
#:no debug information
DBG_NONE = 0 #: no debug information
#: rql execution information
DBG_RQL = 1
#: executed sql
DBG_SQL = 2
#: repository events
DBG_REPO = 4
#: multi-sources
DBG_MS = 8
#: more verbosity
DBG_MORE = 16
#: all level enabled
DBG_ALL = DBG_RQL + DBG_SQL + DBG_REPO + DBG_MS + DBG_MORE
#: current debug mode
DEBUG = 0
def set_debug(debugmode):
"""change the repository debugging mode"""
global DEBUG
if not debugmode:
DEBUG = 0
return
if isinstance(debugmode, basestring):
for mode in splitstrip(debugmode, sep='|'):
DEBUG |= globals()[mode]
else:
DEBUG |= debugmode
class debugged(object):
"""Context manager and decorator to help debug the repository.
It can be used either as a context manager:
>>> with debugged(server.DBG_RQL | server.DBG_REPO):
... # some code in which you want to debug repository activity,
... # seing information about RQL being executed an repository events.
or as a function decorator:
>>> @debugged(server.DBG_RQL | server.DBG_REPO)
... def some_function():
... # some code in which you want to debug repository activity,
... # seing information about RQL being executed an repository events
The debug mode will be reset to its original value when leaving the "with"
block or the decorated function.
"""
def __init__(self, debugmode):
self.debugmode = debugmode
self._clevel = None
def __enter__(self):
"""enter with block"""
self._clevel = DEBUG
set_debug(self.debugmode)
def __exit__(self, exctype, exc, traceback):
"""leave with block"""
set_debug(self._clevel)
return traceback is None
def __call__(self, func):
"""decorate function"""
def wrapped(*args, **kwargs):
_clevel = DEBUG
set_debug(self.debugmode)
try:
return func(*args, **kwargs)
finally:
set_debug(self._clevel)
return wrapped
# database initialization ######################################################
def create_user(session, login, pwd, *groups):
# monkey patch this method if you want to customize admin/anon creation
# (that maybe necessary if you change CWUser's schema)
user = session.create_entity('CWUser', login=login, upassword=pwd)
for group in groups:
session.execute('SET U in_group G WHERE U eid %(u)s, G name %(group)s',
{'u': user.eid, 'group': group})
return user
def init_repository(config, interactive=True, drop=False, vreg=None):
"""initialise a repository database by creating tables add filling them
with the minimal set of entities (ie at least the schema, base groups and
a initial user)
"""
from cubicweb.dbapi import in_memory_repo_cnx
from cubicweb.server.repository import Repository
from cubicweb.server.utils import manager_userpasswd
from cubicweb.server.sqlutils import sqlexec, sqlschema, sqldropschema
# configuration to avoid db schema loading and user'state checking
# on connection
config.creating = True
config.consider_user_state = False
# only enable the system source at initialization time
repo = Repository(config, vreg=vreg)
schema = repo.schema
sourcescfg = config.sources()
_title = '-> creating tables '
print _title,
source = sourcescfg['system']
driver = source['db-driver']
sqlcnx = repo.system_source.get_connection()
sqlcursor = sqlcnx.cursor()
execute = sqlcursor.execute
if drop:
dropsql = sqldropschema(schema, driver)
try:
sqlexec(dropsql, execute)
except Exception, ex:
print '-> drop failed, skipped (%s).' % ex
sqlcnx.rollback()
# schema entities and relations tables
# can't skip entities table even if system source doesn't support them,
# they are used sometimes by generated sql. Keeping them empty is much
# simpler than fixing this...
schemasql = sqlschema(schema, driver)
#skip_entities=[str(e) for e in schema.entities()
# if not repo.system_source.support_entity(str(e))])
sqlexec(schemasql, execute, pbtitle=_title, delimiter=';;')
sqlcursor.close()
sqlcnx.commit()
sqlcnx.close()
session = repo.internal_session()
# insert entity representing the system source
ssource = session.create_entity('CWSource', type=u'native', name=u'system')
repo.system_source.eid = ssource.eid
session.execute('SET X cw_source X WHERE X eid %(x)s', {'x': ssource.eid})
# insert base groups and default admin
print '-> inserting default user and default groups.'
try:
login = unicode(sourcescfg['admin']['login'])
pwd = sourcescfg['admin']['password']
except KeyError:
if interactive:
msg = 'enter login and password of the initial manager account'
login, pwd = manager_userpasswd(msg=msg, confirm=True)
else:
login, pwd = unicode(source['db-user']), source['db-password']
# sort for eid predicatability as expected in some server tests
for group in sorted(BASE_GROUPS):
session.create_entity('CWGroup', name=unicode(group))
admin = create_user(session, login, pwd, 'managers')
session.execute('SET X owned_by U WHERE X is IN (CWGroup,CWSource), U eid %(u)s',
{'u': admin.eid})
session.commit()
session.close()
repo.shutdown()
# reloging using the admin user
config._cubes = None # avoid assertion error
repo, cnx = in_memory_repo_cnx(config, login, password=pwd)
repo.system_source.eid = ssource.eid # redo this manually
# trigger vreg initialisation of entity classes
config.cubicweb_appobject_path = set(('entities',))
config.cube_appobject_path = set(('entities',))
repo.vreg.set_schema(repo.schema)
assert len(repo.sources) == 1, repo.sources
handler = config.migration_handler(schema, interactive=False,
cnx=cnx, repo=repo)
# install additional driver specific sql files
handler.install_custom_sql_scripts(join(CW_SOFTWARE_ROOT, 'schemas'), driver)
for directory in reversed(config.cubes_path()):
handler.install_custom_sql_scripts(join(directory, 'schema'), driver)
# serialize the schema
initialize_schema(config, schema, handler)
# yoo !
cnx.commit()
repo.system_source.init_creating()
cnx.commit()
cnx.close()
repo.shutdown()
# restore initial configuration
config.creating = False
config.consider_user_state = True
print '-> database for instance %s initialized.' % config.appid
def initialize_schema(config, schema, mhandler, event='create'):
from cubicweb.server.schemaserial import serialize_schema
from cubicweb.server.session import hooks_control
session = mhandler.session
paths = [p for p in config.cubes_path() + [config.apphome]
if exists(join(p, 'migration'))]
# deactivate every hooks but those responsible to set metadata
# so, NO INTEGRITY CHECKS are done, to have quicker db creation.
# Active integrity is kept else we may pb such as two default
# workflows for one entity type.
with hooks_control(session, session.HOOKS_DENY_ALL, 'metadata',
'activeintegrity'):
# execute cubicweb's pre<event> script
mhandler.exec_event_script('pre%s' % event)
# execute cubes pre<event> script if any
for path in reversed(paths):
mhandler.exec_event_script('pre%s' % event, path)
# enter instance'schema into the database
session.set_cnxset()
serialize_schema(session, schema)
# execute cubicweb's post<event> script
mhandler.exec_event_script('post%s' % event)
# execute cubes'post<event> script if any
for path in reversed(paths):
mhandler.exec_event_script('post%s' % event, path)
# sqlite'stored procedures have to be registered at connection opening time
from logilab.database import SQL_CONNECT_HOOKS
# add to this set relations which should have their add security checking done
# *BEFORE* adding the actual relation (done after by default)
BEFORE_ADD_RELATIONS = set(('owned_by',))
# add to this set relations which should have their add security checking done
# *at COMMIT TIME* (done after by default)
ON_COMMIT_ADD_RELATIONS = set(())
# available sources registry
SOURCE_TYPES = {'native': LazyObject('cubicweb.server.sources.native', 'NativeSQLSource'),
'pyrorql': LazyObject('cubicweb.server.sources.pyrorql', 'PyroRQLSource'),
'ldapuser': LazyObject('cubicweb.server.sources.ldapuser', 'LDAPUserSource'),
'datafeed': LazyObject('cubicweb.server.sources.datafeed', 'DataFeedSource'),
}