RE: [Springframework-developer] AbstractEnterpriseBean+mutiple be anfactory instances problem

[MacMahon, M. <M.M...@em...>]

Hi Rod,

Thanks for the swift reply (as ever!).

<QUOTE>
What might be even nicer would be 3 tiers:
1. shared across JVM
2. shared per EJB deployment
3. per EJB instance
</QUOTE>

I think (1) should be the default. In fact, I would nearly go as far to
question the usefulness of Spring in an EJB without this - developers would
go back to making horrible getInstance() calls!
I take your point about clustered environments - IMHO we could live with one
beanfactory per jvm.

For now is it best that I override loadBeanFactory() too keep my own static
reference.

Thanks again,

Mark

-----Original Message-----
From: Rod Johnson [mailto:rod...@in...]
Sent: 12 November 2003 12:08
To: spr...@li...
Subject: Re: [Springframework-developer] AbstractEnterpriseBean+mutiple
beanfactory instances problem


Mark,

At the moment it's equivalent to each bean instance managing its own POJOs,
just as if you created them using the new operator.

What I am considering is adding an additional parent bean factory that is a
singleton. This enables common objects to be shared.

What might be even nicer would be 3 tiers:
1. shared across JVM
2. shared per EJB deployment
3. per EJB instance

The only problem is that using a singleton at all in an EJB context is
somewhat fraught. E.g. it won't work across a cluster.

Regards,
Rod

----- Original Message ----- 
From: "MacMahon, Mark" <M.M...@em...>
To: <spr...@li...>
Sent: Wednesday, November 12, 2003 11:51 AM
Subject: [Springframework-developer] AbstractEnterpriseBean+mutiple
beanfactory instances problem


>
> Hi All,
>
> I just have a quick question regarding the use of Spring from a
> Stateful/Stateless session bean.
>
> If Each implementation of Spring's AbstractEnterpriseBean loads its own
> BeanFactory, how can I guarantee that the beans loaded from the
BeanFactory
> are truly singleton?
>
> Shouldn't the XmlBeanFactoryLoader keep a static reference to the
> BeanFactory to ensure that it is loaded only once in a JVM and thus shared
> across all Session Bean instances in the instance pool?
> Am I missing something?
>
> Thanks in advance,
>
> Mark.
>
>
> ____________________________________________________
>
> emuse technologies
> U24 Trinity Enterprise Centre, Pearse Street, Dublin 2, Ireland.
> Tel:  +353 (0)1 6717317 Fax:  +353 (0)1 6717319
> website: <http://www.emusetechnologies.com/>
> email:    in...@em... <mailto:in...@em...>
> ____________________________________________________
>
> This message has been scanned for viruses using GroupShield for Exchange
> Server.
>
> CONFIDENTIALITY NOTICE - The information contained in this email message
is
> intended only for confidential use of the named recipient. If the reader
is
> not the intended recipient or the person responsible for delivering it to
> the recipient, you are hereby notified that you have received this
> communication in error and that any review, dissemination or copying of
this
> communication is strictly prohibited. If you have received this in error,
> please notify the sender immediately.
>
> The information, opinions and recommendations contained herein are and
must
> be construed solely as statements of opinion and not statements of fact.
No
> warranty, expressed or implied, as to the accuracy, timeliness,
> completeness, merchantability or fitness for any particular purpose of any
> such recommendation or information is given or made by emuse technologies
in
> any form or manner whatsoever.
>
>
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by: ApacheCon 2003,
> 16-19 November in Las Vegas. Learn firsthand the latest
> developments in Apache, PHP, Perl, XML, Java, MySQL,
> WebDAV, and more! http://www.apachecon.com/
> _______________________________________________
> Springframework-developer mailing list
> Spr...@li...
> https://lists.sourceforge.net/lists/listinfo/springframework-developer
>




-------------------------------------------------------
This SF.Net email sponsored by: ApacheCon 2003,
16-19 November in Las Vegas. Learn firsthand the latest
developments in Apache, PHP, Perl, XML, Java, MySQL,
WebDAV, and more! http://www.apachecon.com/
_______________________________________________
Springframework-developer mailing list
Spr...@li...
https://lists.sourceforge.net/lists/listinfo/springframework-developer