[server] drop system_source_cnx for a simpler internal API
system_source_cnx() can be replaced with source_cnx().
If system_source_cnx() is called with dbms_system_base=False, it is
strictly equivalent to calling source_cnx() with the same source,
privileges and interactivity.
If system_source_cnx() is called with dbms_system_base=True, it is
equivalent to calling source_cnx() with the system database and the
same source, privileges and interactivity.
No use of the default value for 'special_privs' was found in the code.
# copyright 2003-2016 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/>.
"""Test tools for cubicweb"""
import os
import sys
import errno
import logging
import shutil
import glob
import subprocess
import tempfile
import getpass
from hashlib import sha1 # pylint: disable=E0611
from os.path import abspath, join, exists, split, isdir, dirname
from functools import partial
import pickle
import filelock
from logilab.common.decorators import cached, clear_cache
from cubicweb import ExecutionError
from cubicweb import schema, cwconfig
from cubicweb.server.serverconfig import ServerConfiguration
from cubicweb.web.webconfig import WebConfigurationBase
# db auto-population configuration #############################################
SYSTEM_ENTITIES = (schema.SCHEMA_TYPES
| schema.INTERNAL_TYPES
| schema.WORKFLOW_TYPES
| set(('CWGroup', 'CWUser',))
)
SYSTEM_RELATIONS = (schema.META_RTYPES
| schema.WORKFLOW_RTYPES
| schema.WORKFLOW_DEF_RTYPES
| schema.SYSTEM_RTYPES
| schema.SCHEMA_TYPES
| set(('primary_email', # deducted from other relations
))
)
# content validation configuration #############################################
# validators are used to validate (XML, DTD, whatever) view's content
# validators availables are :
# 'dtd' : validates XML + declared DTD
# 'xml' : guarantees XML is well formed
# None : do not try to validate anything
# {'vid': validator}
VIEW_VALIDATORS = {}
# cubicweb test configuration ##################################################
BASE_URL = 'http://testing.fr/cubicweb/'
DEFAULT_SOURCES = {
'system': {
'adapter': 'native',
'db-encoding': 'UTF-8',
'db-user': u'admin',
'db-password': 'gingkow',
'db-name': 'tmpdb',
'db-driver': 'sqlite',
'db-host': None,
},
'admin': {
'login': u'admin',
'password': u'gingkow',
},
}
DEFAULT_PSQL_SOURCES = DEFAULT_SOURCES.copy()
DEFAULT_PSQL_SOURCES['system'] = DEFAULT_SOURCES['system'].copy()
DEFAULT_PSQL_SOURCES['system']['db-driver'] = 'postgres'
DEFAULT_PSQL_SOURCES['system']['db-user'] = getpass.getuser()
DEFAULT_PSQL_SOURCES['system']['db-password'] = None
# insert a dumb value as db-host to avoid unexpected connection to local server
DEFAULT_PSQL_SOURCES['system']['db-host'] = 'REPLACEME'
def turn_repo_off(repo):
""" Idea: this is less costly than a full re-creation of the repo object.
off:
* session are closed,
* cnxsets are closed
* system source is shutdown
"""
if not repo._needs_refresh:
for cnxset in repo.cnxsets:
cnxset.close(True)
repo.system_source.shutdown()
repo._needs_refresh = True
repo._has_started = False
def turn_repo_on(repo):
"""Idea: this is less costly than a full re-creation of the repo object.
on:
* cnxsets are connected
* cache are cleared
"""
if repo._needs_refresh:
for cnxset in repo.cnxsets:
cnxset.reconnect()
repo.clear_caches()
repo._needs_refresh = False
class TestServerConfiguration(ServerConfiguration):
mode = 'test'
read_instance_schema = False
init_repository = True
skip_db_create_and_restore = False
default_sources = DEFAULT_SOURCES
def __init__(self, appid, test_module_file, log_threshold=logging.CRITICAL + 10):
# must be set before calling parent __init__
apphome = abspath(join(dirname(test_module_file), appid))
self._apphome = apphome
super(TestServerConfiguration, self).__init__(appid)
self.init_log(log_threshold, force=True)
# need this, usually triggered by cubicweb-ctl
self.load_cwctl_plugins()
self.test_module_file = test_module_file
# By default anonymous login are allow but some test need to deny of to
# change the default user. Set it to None to prevent anonymous login.
anonymous_credential = ('anon', 'anon')
def anonymous_user(self):
if not self.anonymous_credential:
return None, None
return self.anonymous_credential
def set_anonymous_allowed(self, allowed, anonuser=u'anon'):
if allowed:
self.anonymous_credential = (anonuser, anonuser)
else:
self.anonymous_credential = None
@property
def apphome(self):
return self._apphome
appdatahome = apphome
def load_configuration(self, **kw):
super(TestServerConfiguration, self).load_configuration(**kw)
# no undo support in tests
self.global_set_option('undo-enabled', 'n')
def main_config_file(self):
"""return instance's control configuration file"""
return join(self.apphome, '%s.conf' % self.name)
def bootstrap_cubes(self):
try:
super(TestServerConfiguration, self).bootstrap_cubes()
except IOError:
# no cubes
self.init_cubes(())
def read_sources_file(self):
"""By default, we run tests with the sqlite DB backend. One may use its
own configuration by just creating a 'sources' file in the test
directory from which tests are launched or by specifying an alternative
sources file using self.sourcefile.
"""
if getattr(self, 'sourcefile', None):
raise Exception('sourcefile isn\'t supported anymore, specify your database '
'configuration using proper configuration class (e.g. '
'PostgresApptestConfiguration)')
try:
super(TestServerConfiguration, self).read_sources_file()
raise Exception('test configuration shouldn\'t provide a sources file, specify your '
'database configuration using proper configuration class (e.g. '
'PostgresApptestConfiguration)')
except ExecutionError:
pass
return self.default_sources
# web config methods needed here for cases when we use this config as a web
# config
def default_base_url(self):
return BASE_URL
class BaseApptestConfiguration(TestServerConfiguration, WebConfigurationBase):
name = 'all-in-one' # so it search for all-in-one.conf, not repository.conf
options = cwconfig.merge_options(TestServerConfiguration.options
+ WebConfigurationBase.options)
cubicweb_appobject_path = (TestServerConfiguration.cubicweb_appobject_path
| WebConfigurationBase.cubicweb_appobject_path)
cube_appobject_path = (TestServerConfiguration.cube_appobject_path
| WebConfigurationBase.cube_appobject_path)
def available_languages(self, *args):
return self.cw_languages()
# XXX merge with BaseApptestConfiguration ?
class ApptestConfiguration(BaseApptestConfiguration):
# `skip_db_create_and_restore` controls wether or not the test database
# should be created / backuped / restored. If set to True, those
# steps are completely skipped, the database is used as is and is
# considered initialized
skip_db_create_and_restore = False
class PostgresApptestConfiguration(ApptestConfiguration):
default_sources = DEFAULT_PSQL_SOURCES
class RealDatabaseConfiguration(ApptestConfiguration):
"""configuration class for tests to run on a real database.
The intialization is done by specifying a source file path.
Important note: init_test_database / reset_test_database steps are
skipped. It's thus up to the test developer to implement setUp/tearDown
accordingly.
Example usage::
class MyTests(CubicWebTC):
_config = RealDatabaseConfiguration('myapp',
sourcefile='/path/to/sources')
def test_something(self):
with self.admin_access.web_request() as req:
rset = req.execute('Any X WHERE X is CWUser')
self.view('foaf', rset, req=req)
"""
skip_db_create_and_restore = True
read_instance_schema = True # read schema from database
# test database handling #######################################################
DEFAULT_EMPTY_DB_ID = '__default_empty_db__'
class TestDataBaseHandler(object):
DRIVER = None
db_cache = {}
explored_glob = set()
def __init__(self, config, init_config=None):
self.config = config
self.init_config = init_config
self._repo = None
# pure consistency check
assert self.system_source['db-driver'] == self.DRIVER
# some handlers want to store info here, avoid a warning
from cubicweb.server.sources.native import NativeSQLSource
NativeSQLSource.options += (
('global-db-name',
{'type': 'string', 'help': 'for internal use only'
}),
)
def _ensure_test_backup_db_dir(self):
"""Return path of directory for database backup.
The function create it if necessary"""
backupdir = join(self.config.apphome, 'database')
try:
os.makedirs(backupdir)
except:
if not isdir(backupdir):
raise
return backupdir
def config_path(self, db_id):
"""Path for config backup of a given database id"""
return self.absolute_backup_file(db_id, 'config')
def absolute_backup_file(self, db_id, suffix):
"""Path for config backup of a given database id"""
# in case db name is an absolute path, we don't want to replace anything
# in parent directories
directory, basename = split(self.dbname)
dbname = basename.replace('-', '_')
assert '.' not in db_id
filename = join(directory, '%s-%s.%s' % (dbname, db_id, suffix))
return join(self._ensure_test_backup_db_dir(), filename)
def db_cache_key(self, db_id, dbname=None):
"""Build a database cache key for a db_id with the current config
This key is meant to be used in the cls.db_cache mapping"""
if dbname is None:
dbname = self.dbname
dbname = os.path.basename(dbname)
dbname = dbname.replace('-', '_')
return (self.config.apphome, dbname, db_id)
def backup_database(self, db_id):
"""Store the content of the current database as <db_id>
The config used are also stored."""
backup_data = self._backup_database(db_id)
config_path = self.config_path(db_id)
# XXX we dump a dict of the config
# This is an experimental to help config dependant setup (like BFSS) to
# be propertly restored
pdir = os.path.dirname(config_path)
with tempfile.NamedTemporaryFile(dir=pdir, delete=False) as conf_file:
conf_file.write(pickle.dumps(dict(self.config)))
os.rename(conf_file.name, config_path)
self.db_cache[self.db_cache_key(db_id)] = (backup_data, config_path)
def _backup_database(self, db_id):
"""Actual backup the current database.
return a value to be stored in db_cache to allow restoration"""
raise NotImplementedError()
def restore_database(self, db_id):
"""Restore a database.
takes as argument value stored in db_cache by self._backup_database"""
# XXX set a clearer error message ???
backup_coordinates, config_path = self.db_cache[self.db_cache_key(db_id)]
# reload the config used to create the database.
with open(config_path, 'rb') as f:
config = pickle.load(f)
# shutdown repo before changing database content
if self._repo is not None:
self._repo.turn_repo_off()
self._restore_database(backup_coordinates, config)
def _restore_database(self, backup_coordinates, config):
"""Actual restore of the current database.
Use the value stored in db_cache as input """
raise NotImplementedError()
def get_repo(self, startup=False):
""" return Repository object on the current database.
(turn the current repo object "on" if there is one or recreate one)
if startup is True, server startup server hooks will be called if needed
"""
if self._repo is None:
self._repo = self._new_repo(self.config)
# config has now been bootstrapped, call init_config if specified
if self.init_config is not None:
self.init_config(self.config)
repo = self._repo
repo.turn_repo_on()
if startup and not repo._has_started:
repo.hm.call_hooks('server_startup', repo=repo)
repo._has_started = True
return repo
def _new_repo(self, config):
"""Factory method to create a new Repository Instance"""
config._cubes = None
repo = config.repository()
config.repository = lambda vreg=None: repo
# extending Repository class
repo._has_started = False
repo._needs_refresh = False
repo.turn_repo_on = partial(turn_repo_on, repo)
repo.turn_repo_off = partial(turn_repo_off, repo)
return repo
def get_cnx(self):
"""return Connection object on the current repository"""
from cubicweb.repoapi import connect
repo = self.get_repo()
sources = self.config.read_sources_file()
login = sources['admin']['login']
password = sources['admin']['password'] or 'xxx'
cnx = connect(repo, login, password=password)
return cnx
def get_repo_and_cnx(self, db_id=DEFAULT_EMPTY_DB_ID):
"""Reset database with the current db_id and return (repo, cnx)
A database *MUST* have been build with the current <db_id> prior to
call this method. See the ``build_db_cache`` method. The returned
repository have it's startup hooks called and the connection is
establised as admin."""
self.restore_database(db_id)
repo = self.get_repo(startup=True)
cnx = self.get_cnx()
return repo, cnx
@property
def system_source(self):
return self.config.system_source_config
@property
def dbname(self):
return self.system_source['db-name']
def init_test_database(self):
"""actual initialisation of the database"""
raise ValueError('no initialization function for driver %r' % self.DRIVER)
def has_cache(self, db_id):
"""Check if a given database id exist in db cache for the current config"""
key = self.db_cache_key(db_id)
if key in self.db_cache:
return True
self.discover_cached_db()
return key in self.db_cache
def discover_cached_db(self):
"""Search available db_if for the current config"""
cache_glob = self.absolute_backup_file('*', '*')
directory = os.path.dirname(cache_glob)
entries = {}
candidates = glob.glob(cache_glob)
for filepath in candidates:
data = os.path.basename(filepath)
# database backup are in the forms are <dbname>-<db_id>.<backtype>
dbname, data = data.split('-', 1)
db_id, filetype = data.split('.', 1)
entries.setdefault((dbname, db_id), {})[filetype] = filepath
for (dbname, db_id), entry in entries.items():
# apply necessary transformation from the driver
value = self.process_cache_entry(directory, dbname, db_id, entry)
assert 'config' in entry
if value is not None: # None value means "not handled by this driver"
key = self.db_cache_key(db_id, dbname=dbname)
self.db_cache[key] = value, entry['config']
self.explored_glob.add(cache_glob)
def process_cache_entry(self, directory, dbname, db_id, entry):
"""Transforms potential cache entry to proper backup coordinate
entry argument is a "filetype" -> "filepath" mapping
Return None if an entry should be ignored."""
return None
def build_db_cache(self, test_db_id=DEFAULT_EMPTY_DB_ID, pre_setup_func=None):
"""Build Database cache for ``test_db_id`` if a cache doesn't exist
if ``test_db_id is DEFAULT_EMPTY_DB_ID`` self.init_test_database is
called. otherwise, DEFAULT_EMPTY_DB_ID is build/restored and
``pre_setup_func`` to setup the database.
This function backup any database it build"""
lockfile = join(self._ensure_test_backup_db_dir(),
'{}.lock'.format(test_db_id))
with filelock.FileLock(lockfile):
if self.has_cache(test_db_id):
return # test_db_id, 'already in cache'
if test_db_id is DEFAULT_EMPTY_DB_ID:
self.init_test_database()
else:
print('Building %s for database %s' % (test_db_id, self.dbname))
self.build_db_cache(DEFAULT_EMPTY_DB_ID)
self.restore_database(DEFAULT_EMPTY_DB_ID)
self.get_repo(startup=True)
cnx = self.get_cnx()
with cnx:
pre_setup_func(cnx, self.config)
cnx.commit()
self.backup_database(test_db_id)
class NoCreateDropDatabaseHandler(TestDataBaseHandler):
"""This handler is used if config.skip_db_create_and_restore is True
This is typically the case with RealDBConfig. In that case,
we explicitely want to skip init / backup / restore phases.
This handler redefines the three corresponding methods and delegates
to original handler for any other method / attribute
"""
def __init__(self, base_handler):
self.base_handler = base_handler
# override init / backup / restore methods
def init_test_database(self):
pass
def backup_database(self, db_id):
pass
def restore_database(self, db_id):
pass
# delegate to original handler in all other cases
def __getattr__(self, attrname):
return getattr(self.base_handler, attrname)
### postgres test database handling ############################################
def startpgcluster(pyfile):
"""Start a postgresql cluster next to pyfile"""
datadir = join(os.path.dirname(pyfile), 'data', 'database',
'pgdb-%s' % os.path.splitext(os.path.basename(pyfile))[0])
if not exists(datadir):
try:
subprocess.check_call(['initdb', '-D', datadir, '-E', 'utf-8', '--locale=C'])
except OSError as err:
if err.errno == errno.ENOENT:
raise OSError('"initdb" could not be found. '
'You should add the postgresql bin folder to your PATH '
'(/usr/lib/postgresql/9.1/bin for example).')
raise
datadir = os.path.abspath(datadir)
pgport = '5432'
env = os.environ.copy()
sockdir = tempfile.mkdtemp(prefix='cwpg')
DEFAULT_PSQL_SOURCES['system']['db-host'] = sockdir
DEFAULT_PSQL_SOURCES['system']['db-port'] = pgport
options = '-h "" -k %s -p %s' % (sockdir, pgport)
options += ' -c fsync=off -c full_page_writes=off'
options += ' -c synchronous_commit=off'
try:
subprocess.check_call(['pg_ctl', 'start', '-w', '-D', datadir,
'-o', options],
env=env)
except OSError as err:
try:
os.rmdir(sockdir)
except OSError:
pass
if err.errno == errno.ENOENT:
raise OSError('"pg_ctl" could not be found. '
'You should add the postgresql bin folder to your PATH '
'(/usr/lib/postgresql/9.1/bin for example).')
raise
def stoppgcluster(pyfile):
"""Kill the postgresql cluster running next to pyfile"""
datadir = join(os.path.dirname(pyfile), 'data', 'database',
'pgdb-%s' % os.path.splitext(os.path.basename(pyfile))[0])
subprocess.call(['pg_ctl', 'stop', '-D', datadir, '-m', 'fast'])
try:
os.rmdir(DEFAULT_PSQL_SOURCES['system']['db-host'])
except OSError:
pass
class PostgresTestDataBaseHandler(TestDataBaseHandler):
DRIVER = 'postgres'
# Separate db_cache for PG databases, to avoid collisions with sqlite dbs
db_cache = {}
explored_glob = set()
__CTL = set()
def __init__(self, *args, **kwargs):
super(PostgresTestDataBaseHandler, self).__init__(*args, **kwargs)
if 'global-db-name' not in self.system_source:
self.system_source['global-db-name'] = self.system_source['db-name']
self.system_source['db-name'] = self.system_source['db-name'] + str(os.getpid())
@property
@cached
def helper(self):
from logilab.database import get_db_helper
return get_db_helper('postgres')
@property
def dbname(self):
return self.system_source['global-db-name']
@property
def dbcnx(self):
try:
return self._cnx
except AttributeError:
from cubicweb.server.serverctl import _db_sys_cnx
try:
self._cnx = _db_sys_cnx(
self.system_source, 'CREATE DATABASE and / or USER',
interactive=False)
return self._cnx
except Exception:
self._cnx = None
raise
@property
@cached
def cursor(self):
return self.dbcnx.cursor()
def process_cache_entry(self, directory, dbname, db_id, entry):
backup_name = self._backup_name(db_id)
if backup_name in self.helper.list_databases(self.cursor):
return backup_name
return None
def has_cache(self, db_id):
backup_name = self._backup_name(db_id)
return (super(PostgresTestDataBaseHandler, self).has_cache(db_id)
and backup_name in self.helper.list_databases(self.cursor))
def init_test_database(self):
"""initialize a fresh postgresql database used for testing purpose"""
from cubicweb.server import init_repository
from cubicweb.server.serverctl import source_cnx, createdb
# connect on the dbms system base to create our base
try:
self._drop(self.system_source['db-name'])
createdb(self.helper, self.system_source, self.dbcnx, self.cursor)
self.dbcnx.commit()
cnx = source_cnx(self.system_source, special_privs='LANGUAGE C',
interactive=False)
templcursor = cnx.cursor()
try:
# XXX factorize with db-create code
self.helper.init_fti_extensions(templcursor)
# install plpythonu/plpgsql language if not installed by the cube
langs = sys.platform == 'win32' and ('plpgsql',) or ('plpythonu', 'plpgsql')
for extlang in langs:
self.helper.create_language(templcursor, extlang)
cnx.commit()
finally:
templcursor.close()
cnx.close()
init_repository(self.config, interactive=False,
init_config=self.init_config)
except BaseException:
if self.dbcnx is not None:
self.dbcnx.rollback()
sys.stderr.write('building %s failed\n' % self.dbname)
raise
def helper_clear_cache(self):
if self.dbcnx is not None:
self.dbcnx.commit()
self.dbcnx.close()
del self._cnx
clear_cache(self, 'cursor')
clear_cache(self, 'helper')
def __del__(self):
self.helper_clear_cache()
@property
def _config_id(self):
return sha1(self.config.apphome.encode('utf-8')).hexdigest()[:10]
def _backup_name(self, db_id): # merge me with parent
backup_name = '_'.join(('cache', self._config_id, self.dbname, db_id))
return backup_name.lower()
def _drop(self, db_name):
if db_name in self.helper.list_databases(self.cursor):
self.cursor.execute('DROP DATABASE %s' % db_name)
self.dbcnx.commit()
def _backup_database(self, db_id):
"""Actual backup the current database.
return a value to be stored in db_cache to allow restoration
"""
from cubicweb.server.serverctl import createdb
orig_name = self.system_source['db-name']
try:
backup_name = self._backup_name(db_id)
self._drop(backup_name)
self.system_source['db-name'] = backup_name
if self._repo:
self._repo.turn_repo_off()
try:
createdb(self.helper, self.system_source, self.dbcnx, self.cursor,
template=orig_name)
self.dbcnx.commit()
finally:
if self._repo:
self._repo.turn_repo_on()
return backup_name
finally:
self.system_source['db-name'] = orig_name
def _restore_database(self, backup_coordinates, config):
from cubicweb.server.serverctl import createdb
"""Actual restore of the current database.
Use the value tostored in db_cache as input """
self._drop(self.system_source['db-name'])
createdb(self.helper, self.system_source, self.dbcnx, self.cursor,
template=backup_coordinates)
self.dbcnx.commit()
# sqlserver2005 test database handling #########################################
class SQLServerTestDataBaseHandler(TestDataBaseHandler):
DRIVER = 'sqlserver'
# XXX complete me
def init_test_database(self):
"""initialize a fresh sqlserver databse used for testing purpose"""
if self.config.init_repository:
from cubicweb.server import init_repository
init_repository(self.config, interactive=False, drop=True,
init_config=self.init_config)
# sqlite test database handling ################################################
class SQLiteTestDataBaseHandler(TestDataBaseHandler):
DRIVER = 'sqlite'
__TMPDB = set()
@classmethod
def _cleanup_all_tmpdb(cls):
for dbpath in cls.__TMPDB:
cls._cleanup_database(dbpath)
def __init__(self, *args, **kwargs):
super(SQLiteTestDataBaseHandler, self).__init__(*args, **kwargs)
# use a dedicated base for each process.
if 'global-db-name' not in self.system_source:
self.system_source['global-db-name'] = self.system_source['db-name']
process_db = self.system_source['db-name'] + str(os.getpid())
self.system_source['db-name'] = process_db
process_db = self.absolute_dbfile() # update db-name to absolute path
self.__TMPDB.add(process_db)
@staticmethod
def _cleanup_database(dbfile):
try:
os.remove(dbfile)
os.remove('%s-journal' % dbfile)
except OSError:
pass
@property
def dbname(self):
return self.system_source['global-db-name']
def absolute_dbfile(self):
"""absolute path of current database file"""
dbfile = join(self._ensure_test_backup_db_dir(),
self.system_source['db-name'])
self.system_source['db-name'] = dbfile
return dbfile
def process_cache_entry(self, directory, dbname, db_id, entry):
return entry.get('sqlite')
def _backup_database(self, db_id=DEFAULT_EMPTY_DB_ID):
# XXX remove database file if it exists ???
dbfile = self.absolute_dbfile()
backup_file = self.absolute_backup_file(db_id, 'sqlite')
shutil.copy(dbfile, backup_file)
return backup_file
def _restore_database(self, backup_coordinates, _config):
# remove database file if it exists ?
dbfile = self.absolute_dbfile()
self._cleanup_database(dbfile)
shutil.copy(backup_coordinates, dbfile)
self.get_repo()
def init_test_database(self):
"""initialize a fresh sqlite databse used for testing purpose"""
# initialize the database
from cubicweb.server import init_repository
self._cleanup_database(self.absolute_dbfile())
init_repository(self.config, interactive=False,
init_config=self.init_config)
import atexit
atexit.register(SQLiteTestDataBaseHandler._cleanup_all_tmpdb)
HANDLERS = {}
def register_handler(handlerkls, overwrite=False):
assert handlerkls is not None
if overwrite or handlerkls.DRIVER not in HANDLERS:
HANDLERS[handlerkls.DRIVER] = handlerkls
else:
msg = "%s: Handler already exists use overwrite if it's intended\n"\
"(existing handler class is %r)"
raise ValueError(msg % (handlerkls.DRIVER, HANDLERS[handlerkls.DRIVER]))
register_handler(PostgresTestDataBaseHandler)
register_handler(SQLiteTestDataBaseHandler)
register_handler(SQLServerTestDataBaseHandler)
class HCache(object):
"""Handler cache object: store database handler for a given configuration.
We only keep one repo in cache to prevent too much objects to stay alive
(database handler holds a reference to a repository). As at the moment a new
handler is created for each TestCase class and all test methods are executed
sequentially whithin this class, there should not have more cache miss that
if we had a wider cache as once a Handler stop being used it won't be used
again.
"""
def __init__(self):
self.config = None
self.handler = None
def get(self, config):
if config is self.config:
return self.handler
else:
return None
def set(self, config, handler):
self.config = config
self.handler = handler
HCACHE = HCache()
# XXX a class method on Test ?
_CONFIG = None
def get_test_db_handler(config, init_config=None):
global _CONFIG
if _CONFIG is not None and config is not _CONFIG:
from logilab.common.modutils import cleanup_sys_modules
# cleanup all dynamically loaded modules and everything in the instance
# directory
apphome = _CONFIG.apphome
if apphome: # may be unset in tests
cleanup_sys_modules([apphome])
# also cleanup sys.path
if apphome in sys.path:
sys.path.remove(apphome)
_CONFIG = config
config.adjust_sys_path()
handler = HCACHE.get(config)
if handler is not None:
return handler
driver = config.system_source_config['db-driver']
handlerkls = HANDLERS.get(driver, None)
if handlerkls is not None:
handler = handlerkls(config, init_config)
if config.skip_db_create_and_restore:
handler = NoCreateDropDatabaseHandler(handler)
HCACHE.set(config, handler)
return handler
else:
raise ValueError('no initialization function for driver %r' % driver)