We have a project with our servlet controller to control transactions. We want data been call session.update/delete/save to save into database and data no call these function do not save into database. How to do this?
for example:

Session s = DBM.getSession();
final String CHANGED_NOT_SAVED = "cc";
final String CHANGED_SAVED = "aa";

MUser user = (MUser)s.load(MUser.class,new Long(30085));
user.setUpdatedBy(CHANGED_SAVED); //expect this data to save into DB
DBM.saveOrUpdate(user);

user.setUpdatedBy(CHANGED_NOT_SAVED); //expect this data DO NOT to save into DB, for jsp showing only

DBM.closeSession(); //commit here

//reload , should not updated fot later value
s = DBM.getSession();

user = (MUser)s.load(MUser.class,new Long(30085));
assertFalse(CHANGED_NOT_SAVED.equals(user.getUpdatedBy()));

assertTrue(CHANGED_SAVED.equals(user.getUpdatedBy()));

DBM.closeSession();

Please help us!!

We use hibernate 2.1.8, I just don't know, if call update() data will save into database, if not call update(), data will also save into database. what is the different?

Call a flush() on the session object after you run the save. This will comit the changes to the DB.


Paul

If you change something in an object, and your cascade setting is enabled (e.g. set to save-update), Hibernate will detect that change and persist it to db whenever you close the session (it checks for updates during session closing). You can put this line into your config file:

<property name="hibernate.connection.autocommit">false</property>

This should disable the auto-flush during session commit. However, from there on you will have to call session.flush() yourself whenever you want to commit changes (after save, update, etc.).

HTH,

Bratek

I can make sure all save using DBM.save***(), not use Session.save**().
I can flush in DBM.save**(). is this ok for above steps?
I commit in servlet controller in filter. not just after save(), but after modify model object for showing in jsp.

and for the following steps:
1. save
2. delete
3. update
4. set values for hibernate model object without calling save or update.
5. commit.

I want step 1-3 is in one transaction, step 4 is ignore when commit.