hi,

We want to implement minimal audit logging. We've implemented
an Interceptor overiding the onFlushDirty method. The previousState
during this method call is always null.

We are using pojo's from detached sessions. The pojo is created in
one session, modified in the web-tier and then sent to the biz tier where
a new session is created and the object is updated.

I read in other posts that this is the reason why the previousState is null

Is there a workaround to it?

thanks
Ram

since reattaching using update will always update, then

Do you mean that I instantiate another session in my Interceptor? and then
do the comparison like you suggested.

Wouldnt that be a performance hit? since you would be creating a new
session through the factory in your interceptor.

A quick thought, out architecture plans us to use "optimistic locking with
automatic versioning" feature of hibernate. To do this wouldnt Hibernate
need to load the old state of the object being updated to do the version
check? Does this mean that with this feature turned on my previous state
would be not-null?

Hum, I did not realize you do that in an interceptor.
In this *particular* case, an interceptor is useless since you actually know that you'll update the object.
To be honest, I've never tryed that at all and never think of a session call inside an interceptor.


I don't think so, a session is light and you can reuse the same underlying conenction than in your initial session.


No

[quote="emmanuel"]
Hum, I did not realize you do that in an interceptor.
In this *particular* case, an interceptor is useless since you actually know that you'll update the object.
To be honest, I've never tryed that at all and never think of a session call inside an interceptor.

I didnt want to create another session in the interceptor. Ended up
implementing onLoad in the interceptor as well. During the business
method did the following



The interceptor's onLoad method stored the state in a hashmap and
when update was called, had the old state if previous state was null