Hi,

After looking through documentation, forum posts and discussions it is my impression that currently there is no solution that allows presentation tier in a remote vm to access instances of hibernate persistent classes, modify those instaces/model and synchronize back with server/backend tier in optimistic fashion.

I've found some relevant presentations and discussions regarding "detached objects", but these are only a viable option in a single vm environement?

Are these assumption correct and what are the options for presentation tier in a remote vm besides going with bad old DTO or VO or whatever they are called these days?

If there are no available options besides DTO/VO, are there any plans by Hibernate team to incorporate possible solutions in future Hibernate releases?


Regards,
Vladimir

Not true. Detached objects can be serialized. Thats the whole point.

Hi,

Is that also the case for detached objects that contain collection references to other persistent instances? Would AuctionItem/Bid example from your JAOO presenation on slide 47 work if persistent instances are modified in a remote vm and then changes persisted in session update call on the server side?

I got the impression that it would not work since that is what gloeglm seems to indicate in the recent post:


Regards,
Vladimir

The only problem is if the collections are lazy loading collections which are uninitialized. Serializing initialized collections accross tiers is no problem. The problem is only if you access collections which would need a session to lazy load their content.

Hi,

Excellent. Thanks for clearing this up.

Regards,
Vladimir