Protected the connection table with a lock.

lib/python/Products/ZGadflyDA/DA.py

@@ -85,15 +85,16 @@
 database_type='Gadfly'
 __doc__='''%s Database Connection
 
-$Id: DA.py,v 1.7 1999/03/10 00:15:29 klm Exp $''' % database_type
-__version__='$Revision: 1.7 $'[11:-2]
+$Id: DA.py,v 1.8 1999/07/22 16:10:04 jim Exp $''' % database_type
+__version__='$Revision: 1.8 $'[11:-2]
 
 from db import DB, manage_DataSources
 import sys, DABase, Globals
-import Shared.DC.ZRDB.Connection
+import Shared.DC.ZRDB.Connection, ThreadLock
 _Connection=Shared.DC.ZRDB.Connection.Connection
 
 _connections={}
+_connections_lock=ThreadLock.allocate_lock()
 
 data_sources=manage_DataSources
 
@@ -140,6 +141,8 @@ class Connection(DABase.Connection):
         return s
 
     def connect(self,s):
+        _connections_lock.acquire()
+        try:
             c=_connections
             if c.has_key(s):
                 c=self._v_database_connection=c[s]
@@ -159,4 +162,6 @@ class Connection(DABase.Connection):
             finally: tb=None
     
             return self
+        finally:
+            _connections_lock.release()