Re: [cinjug-users] Messaging At the Web Layer

["Edward Sumerfield" <esumerfd@xxxxxxxxxxxxxx>]

If you are using the term "business layer" to refer to the EJB container then I would have to ask how I should do that?

We are using Spring/Hibernate in our MDB so I wonder if I could configure a distributed cache, make the web layer get it's data from a session bean and then use normal EJB hosted MDB's to invalidate the cache as needed?

On 10/23/07, josh marotti <marotti@xxxxxxxxx> wrote:

I'm no architect, so I am asking this out of curiosity and for my own
knowledge :

Why can't the caching and JMS be pushed down to the business layer
instead of the web layer?

Thanks,
Josh

On 10/23/07, Edward Sumerfield <esumerfd@xxxxxxxxxxxxxx> wrote:
> I am considering implementing a JMS messaging container at the Web layer.
> Tell me I am a fool? :-)
>
> I have a simple web app polled by a client every second for its data. Not
> wanting to hit the database for every client, every second, it is cached at
> the web layer.
>
> Enter JMS. We will be receiving notifications of changes to the database
> data via JMS messages. So MessageDrivenBeans, deployed to JBoss EJB
> container will receive these messages but what should they do to tell the
> cache in the Web container to update.
>
> It seems my options are to push the cache to a java space somewhere so that
> the web layer and the MDB's can access it or to move the messaging container
> to the web layer.
>
> Thoughts?
>
> Ed
>
>

-- 
Ed