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From Ingo Düppe <>
Subject Re: managed-beans, spring references, and serializable
Date Mon, 25 Sep 2006 20:27:17 GMT
Craig McClanahan schrieb:
>     Actually, I'd be surprised (and impressed) if Spring 2.0 did
>     something different.  The basic philosophy of all the IoC
>     frameworks I've looked at is that they only need to do their magic
>     once, when the bean is initially created.  Whatever happens after
>     that is the responsibility of the application.
> And, that being said, tell me again why your Spring-created beans 
> cannot be Serializable?  That seems to be an architectural design flaw 
> for an application that needs to be supported by a 
> multi-server-instance application server, where the session might get 
> migrated back and forth.
>         Regards,
>         Ingo
>     Craig
Well as I understood the spring 2.0 reference it should be possible to 
inject a request scoped bean into a session scoped bean, so spring must 
call back, so you get each time a fresh request-scoped bean. But I'm not 
really sure about this.

Back to my application design.

I'm using AndroMDA to generate my business and data access layer; the 
presentation layer I'm still writing manually.

My controller beans (jsf backing beans) are thin beans just to trigger 
my service beans (spring beans) from the business layer.
So a typical structure of my objects looks like this:
RegistrationController ------> RegistrationService -------> UserDao 
-------> HibernateDaoSupport

Sometimes I need to save some data like "Did the user accept the user 
agreement during the registration process". I added this temporal values 
to my RegistrationController, because it is his decision whether all 
needed data is collected to trigger the business layer or not. But this 
results in that my controller is in the session scope.

So as I mentioned before, maybe I am wrong here. Maybe it is really 
smarter to separate the controller objects from state data and put them 
into application or request scope.

What do you thing about this?


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