[OJB-developers] Re: Wacky Question about JNDI

[Thomas M. <tho...@ho...>]

Hi Boris,

Thanks for your interest in OJB.

Boris Kuschel wrote:
> 
> This is probably stange to ask here but somehow
> appropriate.
> I need a general mechanism for persistence with
> load balancing support across Relational
> databases, which is supported here, 

May be there is some misunderstanding here:
OJB does support to have objects of different classes stored in
different relational databases.
OJB does NOT support a loadbalancing to store objects of the same class
in different RDBMS.

OJB does provide a loadbalancing on the OJB PersistenceBroker level.
This loadbalanicing does only affect the OJB middleware, but not the
backend databases!

>and for
> Directories as well.
> So my question is, is it possible to (easily)
> plug in JNDI support into this bridge? 


OJB does support JNDI lookup of datasources. But I guess that's not what
you are looking for?

If get you right you want a mechanism that allows you to store objects
either in an RDBMS or in a directory service. ANd then to retrieve
objects from this media transaparently for a client app?
That is your app for example just asks: give me all customer objects
where customer.address.city='London'.
The application does not see whether objects are stored in LDAP or in an
RDBMS.
Is this your requirement?

If so I have good news for you. My company has used the OJB
ojb.broker.query package to write a query adapter to LDAP that uses the
same query api as for RDBMS access!

I'm not sure about your load balancing requirements. You should provide
some more details on this

HTH,

Thomas

> I need a
> general mechanism for persistence with load
> balancing support and all thoses nifty things
> supported here.
> 
> Thanks for any help,
> 
> Boris Kuschel