how to save object economically..

gsegura · **Joined:** Fri Jan 16, 2004 3:22 pm **Posts:** 26

Hi, i'm using hibernate on a web application and not happy with the procedure i'm following to save a object, the app is about persons and their addresses :

- when creating a new address, from the user request i get the data. Also i get a string representing the id of the person owning that address.

- in order to save the address i create from the database a user object just to put it in address.setOwner( ) since its a required, not-null, property.

is there a better way to do it? just using the owner id i already have and without going to the database for the hole object.

regards!

emmanuel · **Posted:** Sat Jan 17, 2004 9:05 am

This is an ORM tool, not a RRM tool :)
Try to use the second level cache. you certainly get the user id from a previous hibernate request.

max · **Posted:** Sat Jan 17, 2004 11:51 am

Just do:

Code:

Address a = new Address();
Person p = session.load(Person.class, id);
a.setOwner(p);

If Person is defined with proxy then load() won't hit the database - and neither will a.setOwner() as it just need to do p.getId() which also won't hit the database.

emmanuel · **Posted:** Sat Jan 17, 2004 2:03 pm

max wrote:

If Person is defined with proxy then load() won't hit the database - and neither will a.setOwner() as it just need to do p.getId() which also won't hit the database.

Stupid of me, why don't I have think of that :)

gsegura · **Joined:** Fri Jan 16, 2004 3:22 pm **Posts:** 26

ok, thanks.. so which object's lifetime is the cache associated with?
i mean, for instance, as long i as keep using the same sessionfactory i have access to the same cache?

michael · **Posted:** Mon Jan 19, 2004 3:20 pm

first-level-cache : Session
second-level-cache (ehchace, swarmcache ...) : SessionFactory