http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Tue, 21 May 2013 02:12:18 -0400 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
We're using JBoss & MySQL, and JBoss doc explicitly says to make transactions as...]]> Mon, 04 Oct 2004 19:00:24 -0400 Mon, 04 Oct 2004 19:00:24 -0400 Mon, 04 Oct 2004 19:00:24 -0400 Oct 4, 2004 Konstantin Sobolev 0 http://www.theserverside.com/discussions/thread.tss?thread_id=29180 Mon, 04 Oct 2004 17:43:24 -0400 Mon, 04 Oct 2004 17:43:24 -0400 Mon, 04 Oct 2004 17:43:24 -0400 Oct 4, 2004 Konstantin Sobolev 0 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
In the hope that I understand your question the right way, here is my view of the situation:

(also see 10.5.10 of the EJB 2.0 specs):the container has the option to use transactions or some optimistic strategy for your problem. There is...]]> Mon, 04 Oct 2004 16:22:39 -0400 Mon, 04 Oct 2004 16:22:39 -0400 Mon, 04 Oct 2004 16:22:39 -0400 Oct 4, 2004 GuyPardon 1 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
That is ofcourse not true, entities always use CMT.]]> Mon, 04 Oct 2004 13:39:59 -0400 Mon, 04 Oct 2004 13:39:59 -0400 Mon, 04 Oct 2004 13:39:59 -0400 Oct 4, 2004 Paul Maessen 0 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
So, one way would be to use BMP instead of CMP. Only your bean...]]> Mon, 04 Oct 2004 13:28:58 -0400 Mon, 04 Oct 2004 13:28:58 -0400 Mon, 04 Oct 2004 13:28:58 -0400 Oct 4, 2004 Paul Maessen 2 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
Erm.. I don't understand. Yes, I surely can modify entity bean code, but it is EJB container who throws NoSuchEntityException. Catching it in the client (session) bean is one of the options I've described in my original post.]]> Mon, 04 Oct 2004 10:44:37 -0400 Mon, 04 Oct 2004 10:44:37 -0400 Mon, 04 Oct 2004 10:44:37 -0400 Oct 4, 2004 Konstantin Sobolev 3 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
I can use row-level locks/table locks but I will end up with RemoveExceptions instead of NoSuchEntityException, thus having to invent some remove-fail-retry logic.

Soft delete won't work at all because after you call B.remove(),...]]> Mon, 04 Oct 2004 10:41:12 -0400 Mon, 04 Oct 2004 10:41:12 -0400 Mon, 04 Oct 2004 10:41:12 -0400 Oct 4, 2004 Konstantin Sobolev 0 http://www.theserverside.com/discussions/thread.tss?thread_id=29180 Mon, 04 Oct 2004 06:39:56 -0400 Mon, 04 Oct 2004 06:39:56 -0400 Mon, 04 Oct 2004 06:39:56 -0400 Oct 4, 2004 Paul Maessen 4 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
2. A non-J2EE way to solve this is to lock objects either via db or a lock table. This would stop clients from...]]> Sun, 03 Oct 2004 21:37:05 -0400 Sun, 03 Oct 2004 21:37:05 -0400 Sun, 03 Oct 2004 21:37:05 -0400 Oct 3, 2004 bruce goldstein 1 http://www.theserverside.com/discussions/thread.tss?thread_id=29180 -find the bean
-call it's methods
is very common, and carefully catching NoSuchEntityException is not an option. I understand that dozens of our session...]]> Sat, 02 Oct 2004 18:01:24 -0400 Sat, 02 Oct 2004 18:01:24 -0400 Sat, 02 Oct 2004 18:01:24 -0400 Oct 2, 2004 Konstantin Sobolev 2 http://www.theserverside.com/discussions/thread.tss?thread_id=29180 Sat, 02 Oct 2004 12:34:00 -0400 Sat, 02 Oct 2004 12:34:00 -0400 Sat, 02 Oct 2004 12:34:00 -0400 Oct 2, 2004 Paul Ste. Marie 3 http://www.theserverside.com/discussions/thread.tss?thread_id=29180
What is the correct way to deal with the following problem:
Let's say we have 2 clients, C1 and C2.
C1 finds entity bean B
C2 removes B
C1 calls B.foo() and gets NoSuchEntityException

Transactions can help, but we're...]]> Sat, 02 Oct 2004 06:37:50 -0400 Sat, 02 Oct 2004 06:37:50 -0400 Sat, 02 Oct 2004 06:37:50 -0400 Oct 2, 2004 Konstantin Sobolev 11