Commit 94c2cab6 authored by Vincent Pelletier's avatar Vincent Pelletier

Implement MySQL connection pooling.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@13633 20353a03-c40f-0410-a6d1-a30d3c3de9de
parent 675bfbb0
......@@ -96,6 +96,7 @@ from Globals import HTMLFile
from ImageFile import ImageFile
from ExtensionClass import Base
from DateTime import DateTime
from thread import allocate_lock
manage_addZMySQLConnectionForm=HTMLFile('connectionAdd',globals())
......@@ -106,6 +107,10 @@ def manage_addZMySQLConnection(self, id, title,
self._setObject(id, Connection(id, title, connection_string, check))
if REQUEST is not None: return self.manage_main(self,REQUEST)
# Connection Pool for connections to MySQL.
database_connection_pool_lock = allocate_lock()
database_connection_pool = {}
class Connection(DABase.Connection):
" "
database_type=database_type
......@@ -117,14 +122,26 @@ class Connection(DABase.Connection):
def factory(self): return DB
def connect(self,s):
try: self._v_database_connection.close()
except: pass
self._v_connected=''
DB=self.factory()
## No try. DO.
self._v_database_connection=DB(s)
self._v_connected=DateTime()
def connect(self, s):
try:
database_connection_pool_lock.acquire()
self._v_connected = ''
pool_key = self.getPhysicalPath()
connection = database_connection_pool.get(pool_key)
if connection is not None and connection.connection == s:
self._v_database_connection = connection
else:
if connection is not None:
connection.close()
DB = self.factory()
database_connection_pool[pool_key] = DB(s, self)
self._v_database_connection = database_connection_pool[pool_key]
# XXX If date is used as such, it can be wrong because an existing
# connection may be reused. But this is suposedly only used as a
# marker to know if connection was successfull.
self._v_connected = DateTime()
finally:
database_connection_pool_lock.release()
return self
def sql_quote__(self, v, escapes={}):
......
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