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 __all__ = ['db_connect', 'close_db']
25 from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT, ISOLATION_LEVEL_READ_COMMITTED, ISOLATION_LEVEL_SERIALIZABLE
26 from psycopg2.psycopg1 import cursor as psycopg1cursor
27 from psycopg2.pool import PoolError
29 import psycopg2.extensions
31 psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
39 def unbuffer(symb, cr):
40 if symb is None: return None
43 def undecimalize(symb, cr):
44 if symb is None: return None
47 for name, typeoid in types_mapping.items():
48 psycopg2.extensions.register_type(psycopg2.extensions.new_type(typeoid, name, lambda x, cr: x))
49 psycopg2.extensions.register_type(psycopg2.extensions.new_type((700, 701, 1700,), 'float', undecimalize))
53 from tools.func import wraps
54 from datetime import datetime as mdt
58 re_from = re.compile('.* from "?([a-zA-Z_0-9]+)"? .*$');
59 re_into = re.compile('.* into "?([a-zA-Z_0-9]+)"? .*$');
62 def log(msg, lvl=netsvc.LOG_DEBUG):
63 logger = netsvc.Logger()
64 logger.notifyChannel('sql', lvl, msg)
71 def wrapper(self, *args, **kwargs):
73 raise psycopg2.ProgrammingError('Unable to use the cursor after having closing it')
74 return f(self, *args, **kwargs)
77 def __init__(self, pool, dbname, serialized=False):
78 self.sql_from_log = {}
79 self.sql_into_log = {}
81 self.sql_log_count = 0
83 self.__closed = True # avoid the call of close() (by __del__) if an exception
84 # is raised by any of the following initialisations
87 self._serialized = serialized
88 self._cnx = pool.borrow(dsn(dbname))
89 self._obj = self._cnx.cursor(cursor_factory=psycopg1cursor)
90 self.__closed = False # real initialisation value
91 self.autocommit(False)
93 if tools.config['log_level'] in (netsvc.LOG_DEBUG, netsvc.LOG_DEBUG_RPC):
94 from inspect import stack
95 self.__caller = tuple(stack()[2][1:3])
99 # Oops. 'self' has not been closed explicitly.
100 # The cursor will be deleted by the garbage collector,
101 # but the database connection is not put back into the connection
102 # pool, preventing some operation on the database like dropping it.
103 # This can also lead to a server overload.
104 if tools.config['log_level'] in (netsvc.LOG_DEBUG, netsvc.LOG_DEBUG_RPC):
105 msg = "Cursor not closed explicitly\n" \
106 "Cursor was created at %s:%s" % self.__caller
107 log(msg, netsvc.LOG_WARNING)
111 def execute(self, query, params=None):
112 if '%d' in query or '%f' in query:
113 log(query, netsvc.LOG_WARNING)
114 log("SQL queries mustn't contain %d or %f anymore. Use only %s", netsvc.LOG_WARNING)
116 query = query.replace('%d', '%s').replace('%f', '%s')
122 params = params or None
123 res = self._obj.execute(query, params)
125 log("bad query: %s" % self._obj.query)
130 log("query: %s" % self._obj.query)
131 self.sql_log_count+=1
132 res_from = re_from.match(query.lower())
134 self.sql_from_log.setdefault(res_from.group(1), [0, 0])
135 self.sql_from_log[res_from.group(1)][0] += 1
136 self.sql_from_log[res_from.group(1)][1] += mdt.now() - now
137 res_into = re_into.match(query.lower())
139 self.sql_into_log.setdefault(res_into.group(1), [0, 0])
140 self.sql_into_log[res_into.group(1)][0] += 1
141 self.sql_into_log[res_into.group(1)][1] += mdt.now() - now
149 sqllogs = {'from':self.sql_from_log, 'into':self.sql_into_log}
150 if not sqllogs[type]:
152 sqllogitems = sqllogs[type].items()
153 sqllogitems.sort(key=lambda k: k[1][1])
155 log("SQL LOG %s:" % (type,))
156 for r in sqllogitems:
157 log("table: %s: %s/%s" %(r[0], str(r[1][1]), r[1][0]))
159 log("SUM:%s/%d" % (sum, self.sql_log_count))
160 sqllogs[type].clear()
163 self.sql_log_count = 0
173 if not self._serialized:
174 self.rollback() # Ensure we close the current transaction.
178 # This force the cursor to be freed, and thus, available again. It is
179 # important because otherwise we can overload the server very easily
180 # because of a cursor shortage (because cursors are not garbage
181 # collected as fast as they should). The problem is probably due in
182 # part because browse records keep a reference to the cursor.
185 self._pool.give_back(self._cnx)
188 def autocommit(self, on):
189 offlevel = [ISOLATION_LEVEL_READ_COMMITTED, ISOLATION_LEVEL_SERIALIZABLE][bool(self._serialized)]
190 self._cnx.set_isolation_level([offlevel, ISOLATION_LEVEL_AUTOCOMMIT][bool(on)])
194 return self._cnx.commit()
198 return self._cnx.rollback()
201 def __getattr__(self, name):
202 return getattr(self._obj, name)
205 class ConnectionPool(object):
209 def _locked(self, *args, **kwargs):
212 return fun(self, *args, **kwargs)
218 def __init__(self, maxconn=64):
219 self._connections = []
220 self._maxconn = max(maxconn, 1)
221 self._lock = threading.Lock()
222 self._logger = netsvc.Logger()
225 #self._logger.notifyChannel('ConnectionPool', netsvc.LOG_INFO, msg)
227 def _debug(self, msg):
228 #self._logger.notifyChannel('ConnectionPool', netsvc.LOG_DEBUG, msg)
232 def borrow(self, dsn):
233 self._log('Borrow connection to %s' % (dsn,))
236 for i, (cnx, used) in enumerate(self._connections):
237 if not used and cnx.dsn == dsn:
238 self._debug('Existing connection found at index %d' % i)
240 self._connections.pop(i)
241 self._connections.append((cnx, True))
248 if len(self._connections) >= self._maxconn:
249 # try to remove the older connection not used
250 for i, (cnx, used) in enumerate(self._connections):
252 self._debug('Removing old connection at index %d: %s' % (i, cnx.dsn))
253 self._connections.pop(i)
256 # note: this code is called only if the for loop has completed (no break)
257 raise PoolError('Connection Pool Full')
259 self._debug('Create new connection')
260 result = psycopg2.connect(dsn=dsn)
261 self._connections.append((result, True))
265 def give_back(self, connection):
266 self._log('Give back connection to %s' % (connection.dsn,))
267 for i, (cnx, used) in enumerate(self._connections):
268 if cnx is connection:
269 self._connections.pop(i)
270 self._connections.append((cnx, False))
273 raise PoolError('This connection does not below to the pool')
276 def close_all(self, dsn):
277 for i, (cnx, used) in tools.reverse_enumerate(self._connections):
280 self._connections.pop(i)
283 class Connection(object):
286 def __init__(self, pool, dbname, unique=False):
289 self._unique = unique
291 if dbname not in self.__LOCKS:
292 self.__LOCKS[dbname] = threading.Lock()
293 self.__LOCKS[dbname].acquire()
297 self.__LOCKS[self.dbname].release()
299 def cursor(self, serialized=False):
300 return Cursor(self._pool, self.dbname, serialized=serialized)
302 def serialized_cursor(self):
303 return self.cursor(True)
307 for p in ('host', 'port', 'user', 'password'):
308 cfg = tools.config['db_' + p]
310 _dsn += '%s=%s ' % (p, cfg)
313 return '%sdbname=%s' % (_dsn, db_name)
316 _Pool = ConnectionPool(int(tools.config['db_maxconn']))
318 def db_connect(db_name):
319 unique = db_name in ['template1', 'template0']
320 return Connection(_Pool, db_name, unique)
322 def close_db(db_name):
323 _Pool.close_all(dsn(db_name))
324 tools.cache.clean_caches_for_db(db_name)
327 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: