1 # -*- coding: utf-8 -*-
2 ##############################################################################
4 # OpenERP, Open Source Management Solution
5 # Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>).
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero General Public License as
9 # published by the Free Software Foundation, either version 3 of the
10 # License, or (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Affero General Public License for more details.
17 # You should have received a copy of the GNU Affero General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ##############################################################################
22 """ Models registries.
25 from contextlib import contextmanager
30 import openerp.osv.orm
33 import openerp.modules.db
34 import openerp.tools.config
36 _logger = logging.getLogger(__name__)
38 class Registry(object):
39 """ Model registry for a particular database.
41 The registry is essentially a mapping between model names and model
42 instances. There is one registry instance per database.
46 def __init__(self, db_name):
47 self.models = {} # model name/model instance mapping
49 self._store_function = {}
51 self._init_parent = {}
53 # modules fully loaded (maintained during init phase by `loading` module)
54 self._init_modules = set()
56 self.db_name = db_name
57 self.db = openerp.sql_db.db_connect(db_name)
60 has_unaccent = openerp.modules.db.has_unaccent(cr)
61 if openerp.tools.config['unaccent'] and not has_unaccent:
62 _logger.warning("The option --unaccent was given but no unaccent() function was found in database.")
63 self.has_unaccent = openerp.tools.config['unaccent'] and has_unaccent
66 def do_parent_store(self, cr):
67 for o in self._init_parent:
68 self.get(o)._parent_store_compute(cr)
72 """ Return the list of model names in this registry."""
73 return self.models.keys()
75 def add(self, model_name, model):
76 """ Add or replace a model in the registry."""
77 self.models[model_name] = model
79 def get(self, model_name):
80 """ Return a model for a given name or None if it doesn't exist."""
81 return self.models.get(model_name)
83 def __getitem__(self, model_name):
84 """ Return a model for a given name or raise KeyError if it doesn't exist."""
85 return self.models[model_name]
87 def load(self, cr, module):
88 """ Load a given module in the registry.
90 At the Python level, the modules are already loaded, but not yet on a
91 per-registry level. This method populates a registry with the given
92 modules, i.e. it instanciates all the classes of a the given module
93 and registers them in the registry.
99 # Instantiate registered classes (via the MetaModel automatic discovery
100 # or via explicit constructor call), and add them to the pool.
101 for cls in openerp.osv.orm.MetaModel.module_to_models.get(module.name, []):
102 res.append(cls.create_instance(self, cr))
106 def schedule_cron_jobs(self):
107 """ Make the cron thread care about this registry/database jobs.
108 This will initiate the cron thread to check for any pending jobs for
109 this registry/database as soon as possible. Then it will continuously
110 monitor the ir.cron model for future jobs. See openerp.cron for
113 openerp.cron.schedule_wakeup(openerp.cron.WAKE_UP_NOW, self.db.dbname)
115 def clear_caches(self):
117 This clears the caches associated to methods decorated with
118 ``tools.ormcache`` or ``tools.ormcache_multi`` for all the models.
120 for model in self.models.itervalues():
124 def cursor(self, auto_commit=True):
125 cr = self.db.cursor()
134 class RegistryManager(object):
135 """ Model registries manager.
137 The manager is responsible for creation and deletion of model
138 registries (essentially database connection/model registry pairs).
141 # Mapping between db name and model registry.
142 # Accessed through the methods below.
144 registries_lock = threading.RLock()
147 def get(cls, db_name, force_demo=False, status=None, update_module=False,
149 """ Return a registry for a given database name."""
151 return cls.registries[db_name]
153 return cls.new(db_name, force_demo, status,
154 update_module, pooljobs)
157 def new(cls, db_name, force_demo=False, status=None,
158 update_module=False, pooljobs=True):
159 """ Create and return a new registry for a given database name.
161 The (possibly) previous registry for that database name is discarded.
164 import openerp.modules
165 with cls.registries_lock:
166 registry = Registry(db_name)
168 # Initializing a registry will call general code which will in turn
169 # call registries.get (this object) to obtain the registry being
170 # initialized. Make it available in the registries dictionary then
171 # remove it if an exception is raised.
173 cls.registries[db_name] = registry
175 # This should be a method on Registry
176 openerp.modules.load_modules(registry.db, force_demo, status, update_module)
178 del cls.registries[db_name]
181 cr = registry.db.cursor()
183 registry.do_parent_store(cr)
184 registry.get('ir.actions.report.xml').register_all(cr)
190 registry.schedule_cron_jobs()
195 def delete(cls, db_name):
196 """Delete the registry linked to a given database.
198 This also cleans the associated caches. For good measure this also
199 cancels the associated cron job. But please note that the cron job can
200 be running and take some time before ending, and that you should not
201 remove a registry if it can still be used by some thread. So it might
202 be necessary to call yourself openerp.cron.Agent.cancel(db_name) and
203 and join (i.e. wait for) the thread.
205 with cls.registries_lock:
206 if db_name in cls.registries:
207 cls.registries[db_name].clear_caches()
208 del cls.registries[db_name]
209 openerp.cron.cancel(db_name)
213 """Delete all the registries. """
214 with cls.registries_lock:
215 for db_name in cls.registries.keys():
219 def clear_caches(cls, db_name):
222 This clears the caches associated to methods decorated with
223 ``tools.ormcache`` or ``tools.ormcache_multi`` for all the models
224 of the given database name.
226 This method is given to spare you a ``RegistryManager.get(db_name)``
227 that would loads the given database if it was not already loaded.
229 with cls.registries_lock:
230 if db_name in cls.registries:
231 cls.registries[db_name].clear_caches()
234 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: