behavior persistent objects when broker is closed

[Bonnie MacKellar <BM...@mobius.com>]

I am using the PB API. If I retrieve some object and then close the broker,
how
does that affect the object? Lets say that the object references some other
object (via a proxied reference). If I traverse that reference when all
brokers are
closed, what happens?

Also, does anyone expose persistent objects in their GUI layer? How do you
deal with stale data? Is there a "best practices" for the integration of
OJB with a GUI layer?

Bonnie MacKellar
software engineer
Mobius Management Systems, Inc.
bmackell@mobius.com

Re: behavior persistent objects when broker is closed

[Armin Waibel <ar...@code-au-lait.de>]

Hi Bonnie,

----- Original Message -----
From: "Bonnie MacKellar" <BM...@mobius.com>
To: "OJB Users List (E-mail)" <oj...@db.apache.org>
Sent: Thursday, August 07, 2003 9:28 PM
Subject: behavior persistent objects when broker is closed


> I am using the PB API. If I retrieve some object and then close the
broker,
> how
> does that affect the object?

If PB.close() was called, all subsequent method calls
(excepting #isClosed()) will cause an exception (since version
rc4 or higher).

> Lets say that the object references some other
> object (via a proxied reference). If I traverse that reference when
all
> brokers are
> closed, what happens?
>

Normally the proxy knows the PBKey associated with the
main object. So if all broker instances are closed the proxy
lookup a new PB instance via the PBKey to materialize
the real object.

regards,
Armin

> Also, does anyone expose persistent objects in their GUI layer? How do
you
> deal with stale data? Is there a "best practices" for the integration
of
> OJB with a GUI layer?
>
> Bonnie MacKellar
> software engineer
> Mobius Management Systems, Inc.
> bmackell@mobius.com
>
>
>



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