1 # -*- encoding: utf-8 -*-
2 ##############################################################################
4 # OpenERP, Open Source Management Solution
5 # Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>). All Rights Reserved
8 # This program is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation, either version 3 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 ##############################################################################
23 __all__ = ['db_connect', 'close_db']
26 from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT, ISOLATION_LEVEL_READ_COMMITTED, ISOLATION_LEVEL_SERIALIZABLE
27 from psycopg2.psycopg1 import cursor as psycopg1cursor
28 from psycopg2.pool import PoolError
30 import psycopg2.extensions
32 psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
40 def unbuffer(symb, cr):
41 if symb is None: return None
44 def undecimalize(symb, cr):
45 if symb is None: return None
48 for name, typeoid in types_mapping.items():
49 psycopg2.extensions.register_type(psycopg2.extensions.new_type(typeoid, name, lambda x, cr: x))
50 psycopg2.extensions.register_type(psycopg2.extensions.new_type((700, 701, 1700,), 'float', undecimalize))
54 from tools.func import wraps
55 from datetime import datetime as mdt
59 re_from = re.compile('.* from "?([a-zA-Z_0-9]+)"? .*$');
60 re_into = re.compile('.* into "?([a-zA-Z_0-9]+)"? .*$');
63 def log(msg, lvl=netsvc.LOG_DEBUG):
64 logger = netsvc.Logger()
65 logger.notifyChannel('sql', lvl, msg)
72 def wrapper(self, *args, **kwargs):
74 raise psycopg2.ProgrammingError('Unable to use the cursor after having closing it')
75 return f(self, *args, **kwargs)
78 def __init__(self, pool, dbname, serialized=False):
79 self.sql_from_log = {}
80 self.sql_into_log = {}
82 self.sql_log_count = 0
84 self.__closed = True # avoid the call of close() (by __del__) if an exception
85 # is raised by any of the following initialisations
88 self._serialized = serialized
89 self._cnx = pool.borrow(dsn(dbname))
90 self._obj = self._cnx.cursor(cursor_factory=psycopg1cursor)
91 self.__closed = False # real initialisation value
92 self.autocommit(False)
94 if tools.config['log_level'] in (netsvc.LOG_DEBUG, netsvc.LOG_DEBUG_RPC):
95 from inspect import stack
96 self.__caller = tuple(stack()[2][1:3])
100 # Oops. 'self' has not been closed explicitly.
101 # The cursor will be deleted by the garbage collector,
102 # but the database connection is not put back into the connection
103 # pool, preventing some operation on the database like dropping it.
104 # This can also lead to a server overload.
105 if tools.config['log_level'] in (netsvc.LOG_DEBUG, netsvc.LOG_DEBUG_RPC):
106 msg = "Cursor not closed explicitly\n" \
107 "Cursor was created at %s:%s" % self.__caller
108 log(msg, netsvc.LOG_WARNING)
112 def execute(self, query, params=None):
113 if '%d' in query or '%f' in query:
114 log(query, netsvc.LOG_WARNING)
115 log("SQL queries mustn't contain %d or %f anymore. Use only %s", netsvc.LOG_WARNING)
117 query = query.replace('%d', '%s').replace('%f', '%s')
123 params = params or None
124 res = self._obj.execute(query, params)
126 log("bad query: %s" % self._obj.query)
131 log("query: %s" % self._obj.query)
132 self.sql_log_count+=1
133 res_from = re_from.match(query.lower())
135 self.sql_from_log.setdefault(res_from.group(1), [0, 0])
136 self.sql_from_log[res_from.group(1)][0] += 1
137 self.sql_from_log[res_from.group(1)][1] += mdt.now() - now
138 res_into = re_into.match(query.lower())
140 self.sql_into_log.setdefault(res_into.group(1), [0, 0])
141 self.sql_into_log[res_into.group(1)][0] += 1
142 self.sql_into_log[res_into.group(1)][1] += mdt.now() - now
150 sqllogs = {'from':self.sql_from_log, 'into':self.sql_into_log}
151 if not sqllogs[type]:
153 sqllogitems = sqllogs[type].items()
154 sqllogitems.sort(key=lambda k: k[1][1])
156 log("SQL LOG %s:" % (type,))
157 for r in sqllogitems:
158 log("table: %s: %s/%s" %(r[0], str(r[1][1]), r[1][0]))
160 log("SUM:%s/%d" % (sum, self.sql_log_count))
161 sqllogs[type].clear()
164 self.sql_log_count = 0
174 if not self._serialized:
175 self.rollback() # Ensure we close the current transaction.
179 # This force the cursor to be freed, and thus, available again. It is
180 # important because otherwise we can overload the server very easily
181 # because of a cursor shortage (because cursors are not garbage
182 # collected as fast as they should). The problem is probably due in
183 # part because browse records keep a reference to the cursor.
186 self._pool.give_back(self._cnx)
189 def autocommit(self, on):
190 offlevel = [ISOLATION_LEVEL_READ_COMMITTED, ISOLATION_LEVEL_SERIALIZABLE][bool(self._serialized)]
191 self._cnx.set_isolation_level([offlevel, ISOLATION_LEVEL_AUTOCOMMIT][bool(on)])
195 return self._cnx.commit()
199 return self._cnx.rollback()
202 def __getattr__(self, name):
203 return getattr(self._obj, name)
206 class ConnectionPool(object):
210 def _locked(self, *args, **kwargs):
213 return fun(self, *args, **kwargs)
219 def __init__(self, maxconn=64):
220 self._connections = []
221 self._maxconn = max(maxconn, 1)
222 self._lock = threading.Lock()
223 self._logger = netsvc.Logger()
226 #self._logger.notifyChannel('ConnectionPool', netsvc.LOG_INFO, msg)
228 def _debug(self, msg):
229 #self._logger.notifyChannel('ConnectionPool', netsvc.LOG_DEBUG, msg)
233 def borrow(self, dsn):
234 self._log('Borrow connection to %s' % (dsn,))
237 for i, (cnx, used) in enumerate(self._connections):
238 if not used and cnx.dsn == dsn:
239 self._debug('Existing connection found at index %d' % i)
241 self._connections.pop(i)
242 self._connections.append((cnx, True))
249 if len(self._connections) >= self._maxconn:
250 # try to remove the older connection not used
251 for i, (cnx, used) in enumerate(self._connections):
253 self._debug('Removing old connection at index %d: %s' % (i, cnx.dsn))
254 self._connections.pop(i)
257 # note: this code is called only if the for loop has completed (no break)
258 raise PoolError('Connection Pool Full')
260 self._debug('Create new connection')
261 result = psycopg2.connect(dsn=dsn)
262 self._connections.append((result, True))
266 def give_back(self, connection):
267 self._log('Give back connection to %s' % (connection.dsn,))
268 for i, (cnx, used) in enumerate(self._connections):
269 if cnx is connection:
270 self._connections.pop(i)
271 self._connections.append((cnx, False))
274 raise PoolError('This connection does not below to the pool')
277 def close_all(self, dsn):
278 for i, (cnx, used) in tools.reverse_enumerate(self._connections):
281 self._connections.pop(i)
284 class Connection(object):
287 def __init__(self, pool, dbname, unique=False):
290 self._unique = unique
292 if dbname not in self.__LOCKS:
293 self.__LOCKS[dbname] = threading.Lock()
294 self.__LOCKS[dbname].acquire()
298 self.__LOCKS[self.dbname].release()
300 def cursor(self, serialized=False):
301 return Cursor(self._pool, self.dbname, serialized=serialized)
303 def serialized_cursor(self):
304 return self.cursor(True)
308 for p in ('host', 'port', 'user', 'password'):
309 cfg = tools.config['db_' + p]
311 _dsn += '%s=%s ' % (p, cfg)
314 return '%sdbname=%s' % (_dsn, db_name)
317 _Pool = ConnectionPool(int(tools.config['db_maxconn']))
319 def db_connect(db_name):
320 unique = db_name in ['template1', 'template0']
321 return Connection(_Pool, db_name, unique)
323 def close_db(db_name):
324 _Pool.close_all(dsn(db_name))
325 tools.cache.clean_caches_for_db(db_name)
328 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: