[ZODB-Dev] Mutlithreaded ZODB applications.

[Dieter Maurer]

Kenneth Miller wrote at 2008-1-17 15:03 -0600:
>I see in the user guide that it mentions that you need to have a connection
>instance per thread to allow multiple threads to access a particular FS.
>Does anyone have any simple example code on doing this?

News threads usually have a form like:

     import transaction
     from ZODB.POSException import ConflictError

     conn = db.open() # open a new ZODB connection
     root = conn.root()
     try:
       retry = True
       while retry:
         retry = False
	 try:
	   do_your_function(root)
	   transaction.commit()
	 except ConflictError:
	   transaction.abort()
	   retry = True # you may want to restrict the possible retry number
	 except:
	   transaction.abort()
	   # you may want to log your exception in some way
	   raise
     finally:
       conn.close()


-- 
Dieter