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.
29 import openerp.osv.orm
32 import openerp.modules.db
33 import openerp.tools.config
35 _logger = logging.getLogger(__name__)
37 class Registry(object):
38 """ Model registry for a particular database.
40 The registry is essentially a mapping between model names and model
41 instances. There is one registry instance per database.
45 def __init__(self, db_name):
46 self.models = {} # model name/model instance mapping
48 self._store_function = {}
50 self._init_parent = {}
52 # modules fully loaded (maintained during init phase by `loading` module)
53 self._init_modules = set()
55 self.db_name = db_name
56 self.db = openerp.sql_db.db_connect(db_name)
59 has_unaccent = openerp.modules.db.has_unaccent(cr)
60 if openerp.tools.config['unaccent'] and not has_unaccent:
61 _logger.warning("The option --unaccent was given but no unaccent() function was found in database.")
62 self.has_unaccent = openerp.tools.config['unaccent'] and has_unaccent
65 def do_parent_store(self, cr):
66 for o in self._init_parent:
67 self.get(o)._parent_store_compute(cr)
71 """ Return the list of model names in this registry."""
72 return self.models.keys()
74 def add(self, model_name, model):
75 """ Add or replace a model in the registry."""
76 self.models[model_name] = model
78 def get(self, model_name):
79 """ Return a model for a given name or None if it doesn't exist."""
80 return self.models.get(model_name)
82 def __getitem__(self, model_name):
83 """ Return a model for a given name or raise KeyError if it doesn't exist."""
84 return self.models[model_name]
86 def load(self, cr, module):
87 """ Load a given module in the registry.
89 At the Python level, the modules are already loaded, but not yet on a
90 per-registry level. This method populates a registry with the given
91 modules, i.e. it instanciates all the classes of a the given module
92 and registers them in the registry.
98 # Instantiate registered classes (via the MetaModel automatic discovery
99 # or via explicit constructor call), and add them to the pool.
100 for cls in openerp.osv.orm.MetaModel.module_to_models.get(module.name, []):
101 res.append(cls.create_instance(self, cr))
105 def schedule_cron_jobs(self):
106 """ Make the cron thread care about this registry/database jobs.
107 This will initiate the cron thread to check for any pending jobs for
108 this registry/database as soon as possible. Then it will continuously
109 monitor the ir.cron model for future jobs. See openerp.cron for
112 openerp.cron.schedule_wakeup(openerp.cron.WAKE_UP_NOW, self.db.dbname)
114 def clear_caches(self):
116 This clears the caches associated to methods decorated with
117 ``tools.ormcache`` or ``tools.ormcache_multi`` for all the models.
119 for model in self.models.itervalues():
122 class RegistryManager(object):
123 """ Model registries manager.
125 The manager is responsible for creation and deletion of model
126 registries (essentially database connection/model registry pairs).
129 # Mapping between db name and model registry.
130 # Accessed through the methods below.
132 registries_lock = threading.RLock()
135 def get(cls, db_name, force_demo=False, status=None, update_module=False,
137 """ Return a registry for a given database name."""
139 return cls.registries[db_name]
141 return cls.new(db_name, force_demo, status,
142 update_module, pooljobs)
145 def new(cls, db_name, force_demo=False, status=None,
146 update_module=False, pooljobs=True):
147 """ Create and return a new registry for a given database name.
149 The (possibly) previous registry for that database name is discarded.
152 import openerp.modules
153 with cls.registries_lock:
154 registry = Registry(db_name)
156 # Initializing a registry will call general code which will in turn
157 # call registries.get (this object) to obtain the registry being
158 # initialized. Make it available in the registries dictionary then
159 # remove it if an exception is raised.
161 cls.registries[db_name] = registry
163 # This should be a method on Registry
164 openerp.modules.load_modules(registry.db, force_demo, status, update_module)
166 del cls.registries[db_name]
169 cr = registry.db.cursor()
171 registry.do_parent_store(cr)
172 registry.get('ir.actions.report.xml').register_all(cr)
178 registry.schedule_cron_jobs()
183 def delete(cls, db_name):
184 """Delete the registry linked to a given database.
186 This also cleans the associated caches. For good measure this also
187 cancels the associated cron job. But please note that the cron job can
188 be running and take some time before ending, and that you should not
189 remove a registry if it can still be used by some thread. So it might
190 be necessary to call yourself openerp.cron.Agent.cancel(db_name) and
191 and join (i.e. wait for) the thread.
193 with cls.registries_lock:
194 if db_name in cls.registries:
195 cls.registries[db_name].clear_caches()
196 del cls.registries[db_name]
197 openerp.cron.cancel(db_name)
202 """Delete all the registries. """
203 with cls.registries_lock:
204 for db_name in cls.registries.keys():
208 def clear_caches(cls, db_name):
211 This clears the caches associated to methods decorated with
212 ``tools.ormcache`` or ``tools.ormcache_multi`` for all the models
213 of the given database name.
215 This method is given to spare you a ``RegistryManager.get(db_name)``
216 that would loads the given database if it was not already loaded.
218 with cls.registries_lock:
219 if db_name in cls.registries:
220 cls.registries[db_name].clear_caches()
223 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: