Re: [Hibernate] remoting hibernate

[Max R. A. <max...@jb...>]

Don't think the code is easily extractable for you to use, plus it still
will have alot of conceptually problems ....

note, there have been talks about serializing a "lightweight  
persistentcontext with delta's",
to allow this kind of remoting - but until now it have just been talks.

/max

> Hi list,
>
> Before you stop reading: This is not about the LazyLoadingException :-)
>
> I am writing framework code to expose simple crud-operations for use in  
> a generic gui in both 2 and 3-tier environments (richclient). In doing  
> so, I stumbled across a few problems that must pop up frequently, but I  
> did not find readily applicable solutions. In particular, I'd like to  
> ensure that the objects representing persisted objects on the client are  
> unique, i.e. representatives should be shared among all gui components,  
> enforcing agreement on the logical object's displayed state.
>
> If hibernate were local, I'd simply use the hibernate session, but in  
> the 3-tier scenario, it is remote (and sending the session over the wire  
> might have far-reaching consequences). We are therefore considering to  
> intercept access to hibernate, fixing mangled object identities on the  
> client. This appears feasible, but duplicates quite a bit of hibernate's  
> code, hence the following questions:
>
> What is the intended approach for remoting hibernate in a rich-client?  
> If I have to do this manually, is it feasible to decouple persistence  
> logic from a hibernate session to get identity management only,  
> permitting to move this "lightweight session" into the client tier? Or  
> is it at least possible to reuse identity retrieval, proxy management or  
> state copying [1] code from hibernate?
>
> In case you are curious, my draft code for the manual solution is  
> attached.
>
>  <<IdentityFixerPrototype.java>>   
> <<HibernateProxyAwareIdentityFixerPrototype.java>>
>
> What do you think?
>
> Regards
> Adrian Moos
>
> [1] that is: to copy all state from one object onto another of the same  
> type.



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Max Rydahl Andersen
callto://max.rydahl.andersen

Hibernate
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JBoss Inc
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