Yes, if you get all he objects by value in one call this will work fine. I
understood the question to mean that the identical objects were fetched in
separate remote invocations...
Regards,
-Chris.
> -----Original Message-----
> From: Jonathan K. Weedon [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, June 07, 2000 12:56 PM
> To: [EMAIL PROTECTED]
> Subject: Re: pass by value / ref?
>
> Chris,
>
> <vendor>
>
> I believe you are wrong. If I have an object:
>
> public ObjectProxy implement Serializable {
> private Collection c1;
> private Collection c2;
> }
>
> And I send it to a peer using a correct implementation of RMI
> (regardless of the protocol underneath), then any value objects
> which are in both c1 and c2 should retain their identity
> equivalence, i.e., they should still be pointer equivalent.
>
> Daniel,
>
> If you are not seeing this behavior, then you are using a broken
> implementation of RMI. I posted a few months back a test which
> can be used to check how good your product's RMI implementation
> is, under the (admittedly oddly titled) thread:
>
> Why smoke signals matter
>
> In this I show that a number of vendors don't implement the RMI
> semantics correctly. The case you are seeing is not included
> in the test, however, and I suspect this case is probably broken
> in in some of the AppServers which passed the existing tests.
>
> If, by bad luck, you are seeing this incorrect behavior using IAS,
> I would very much like to know about it, as it would constitute a
> bug. If so, please post to:
>
> news://newsgroups.borland.com/inprise.public.appserver
>
> </vendor>
>
> -jkw
>
> Chris Raber wrote:
> >
> > If you need to maintain the identity mapping you'll have to do so
> yourself
> > (e.g. by using a hashmap keyed by identity...). Remote references are
> > handled for you ok, but copies are not. This is also true for CORBA. The
> > only middleware I am aware of that maintains identity caching or
> > "replication" is GemStone's Smalltalk client. But that's quite different
> > than EJB...
> >
> > Regards,
> >
> > -Chris
> >
> > > -----Original Message-----
> > > From: Daniel Bradby [SMTP:[EMAIL PROTECTED]]
> > > Sent: Wednesday, June 07, 2000 4:05 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: pass by value / ref?
> > >
> > > I think I have come across an issue which I am sure many of you have
> > > come across and dealt with before.
> > >
> > > I am creating an object proxy that contains two collections. There are
> > > situations were the another single object resides in these two
> different
> > > collections.
> > >
> > > When I send this object proxy over the wire the single object in the
> two
> > > collections is similar by value but not by reference anymore.
> > >
> > > I currently overcome this by assinging object IDs to each object which
> > > helps.
> > >
> > > Anyone got some strategies / thoughts on this
> > >
> > > --
> > > Daniel Bradby
> > > BJS Australia
> > > [EMAIL PROTECTED]
> > >
> > >
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> >
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