[ZODB-Dev] Thread safety

[Tim Peters]

[Dmitry Vasiliev]
> For example consider the following code:
>
> def getReply(request):
>      lock.acquire()
>      try:
>          try:
>              reply = _getReply(request)
>              transaction.commit()
>          except:
>              log.error("error", exc_info=True)
>              transaction.abort()
>              reply = None
>          return reply
>      finally:
>          lock.release()
>
> All persistent objects changes only inside _getReply() function. Two
> threads concurrently calls getReply() function...
>
> Is it safe? Is it possibly/safe to use only one connection object?

*Offhand* I can't think of a reason for that breaking.  But it's not how
threads were intended to be used in ZODB, and I don't have spare time to
think about it.  Maybe someone else does.