If i now deside, that there was something wrong with data submited,
i would rollback. But problem is that other sessions from other
users are seeing my rollbacked changes.
What? If that's true, either you're not actually rolling back, or
you're hanging on to persistent objects across requests.
Hibernate's cache is transactional.
P
On Dec 19, 2005, at 9:14 AM, Rick Uks wrote:
if you don't mind hitting the database on every request.
If you use Hibernate caching, you're not hitting the DB. I like this
approach best: it keeps data fresh, and you can let you Hibernate
cache plugin deal with data consistency issues instead of your app.
Add to that a custom SqueezeAdaptor that fetches your Hibernate
objects, and you can basically act as though you're just passing
persistent objects to and from listeners, even though they're
magically always a new, up-to-date object on each request.
I did just that but i run into trouble with unwanted updates in
case of
submiting changes:
1) Custom SqueezeAdaptor fetches object
2) Tapestry updates values of my persistent object (object is now
dirty for
Hibernate)
3) Now if i make some call to other related objects Hibernate may call
insert or update
If i now deside, that there was something wrong with data submited,
i would
rollback. But problem is that
other sessions from other users are seeing my rollbacked changes.
I use Ehcache with most objects configured 'read-write' cache option.
i see in my startup logs following lines
16:52:55,538 INFO transaction.TransactionFactoryFactory - Using
default
transaction strategy (direct JDBC transactions)
16:52:55,538 INFO transaction.TransactionManagerLookupFactory - No
TransactionManagerLookup configured (in JTA environment, use of
read-write
or transactional
second-level cache is not recommended)
How can i hide changes inside transaction from other sesions?
At the moment i use approach that i check if everithing is ok and
only then
attach object to sesson bt session.lock and save changes.
Rick
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