I've seen this behaviour before if the primary key is not implemented
correctly e.g. if hashCode or equals hasn't been overridden for a String
based key. Is this the case?
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Aaron Mulder
Sent: Thursday, September 21, 2000 4:55 PM
To: jBoss Developer
Subject: Re: [jBoss-Dev] Entity instance problems...
It's hard to diagnose this without more information. Code would
be most helpful, but lacking that, let me see if I have this straight:
- session call begins, transaction created
- entity is created (with PK foo, and other value 1)
- at this point, the DB should hold 1
- entity is updated (still PK foo, other value now 2)
- at this point, the DB should hold 2
- findByPrimaryKey(foo) called to retrieve entity foo again
- at this point, the DB should hold 2 still
- but the returned entity foo holds 1
- session call ends, transaction committed
Is that right? If I have the database stuff straight, are you
using CMP or BMP? Are you using a normal JDBC 1/2 driver or a vendor
native JDBC 2 Optional Package driver? Or is there no DB at all (now that
I look, I see you didn't mention one)?
Aaron
On Wed, 20 Sep 2000, Patrick J. McNerthney wrote:
> JBoss,
>
> Here is the latest problem I am running into in my attempt to port my
> application from WebLogic to jBoss.
>
> The following sequence of events is not working correctly:
>
> 1. A stateless session bean method is called with a transaction
> required.
> 2. While within #1, a "Sequence" entity bean which provides a
> sequential counter is created. The current counter value of 1 (since it
> has just been created) is retrieved. When this counter value is
> retrieved, the entity bean increments it's value to 2 for the next time
> it is called.
> 3. Also while within #1, another sub-routine does an entity find to
> retrieve the same Sequence entity bean created in #2. When the current
> counter value is retrieved, 1 is returned.
>
> This is incorrect, a counter value of 2 should be returned (which
> WebLogic does return). It appears that the entity find process during
> step #3 does not end up using the same instance of the Sequence ejb
> implementation that was created during step #2, but instead instantiates
> a new instance with the image that was persisted during the entity
> create.
>
>
> Pat McNerthney
> Icicle Software, Inc.
>
