Re[2]: [OJB-developers] Re: OJB-ODMG does[n't] support implicit locking

[Doug C. <de...@fl...>]

Hello Thomas,

Saturday, February 02, 2002, 6:35:51 AM, you wrote:
<snip>
TM> Hmm. If you are NOT using "read-uncommited" and there is no
TM> READ-lock in the LockMap it must be a bug! Which isolation level
TM> are you using for  class Article ?

In two tests I used: <MappingRepository isolation="repeatable-read">
as well as the usual repository.xml; both gave the same results. So
yes, I think there's a bug.

TM> Maybe we need different semantics for the isolation levels? Did you have 
TM> a look at my doc concerning the LockManager? It contains a table 
TM> demonstrating the behaviour of all isolation levels currently implemented.

I will look at it more closely. I've hestitated to use the default
read-uncommited isolation level because I don't understand the
implications of the semantics. It's one thing to have transactions
overlap; it's quite another to read a partially modified object. I am
not that brave!

Regards,

e