RE: [Hibernate] Lazy Collections

[Gavin K. <Gav...@ex...>]

I agree. Furthermore there are some serious conceptual problems with
regards to ensuring transaction isolation and also potential performance
problems if a single task required multiple connections to the database.


-----Original Message-----
From: Max Rydahl Andersen [mailto:ma...@eo...]=20
Sent: Tuesday, 3 December 2002 10:59 PM
To: Jonas Van Poucke; Hibernate Developers
Subject: Re: [Hibernate] Lazy Collections



No! If an session has been closed forcefully or by other means,
hibernate internals should not reopen the session - at least not per
default! If the session has been closed there is a reason for it - one
might be to ensure that the ui-layer does not accidently fetches data by
"dotting" around in the object graph.

If you want the session to be (re)opend - why don't you just keep the
session open ?

/max

----- Original Message -----
From: "Jonas Van Poucke" <jvp...@ti...>
To: "Hibernate Developers" <hib...@li...>
Sent: Tuesday, December 03, 2002 9:20 AM
Subject: [Hibernate] Lazy Collections


The implementation of the write() method in
cirrus.hibernate.collections.PersistentCollection
states:

protected final void write() {
initialize(true);
if ( session!=3Dnull && session.isOpen() ) session.dirty(this);
}

This means the session needs to be open.
Also, the Docs mentions that lazy collections need to have an open
session. Could we safely modify the code to reopen the session when
needed? protected final void write() { initialize(true); if ( session !=3D
null ) {
                    if ( session.isOpen() ) {
                        session.dirty(this);
                    } else {
                        // Re-open session
                        session.reopen(); // ommitted try-catch
                        session.dirty(this);
                    }
                }
}


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