Design Question

[HuiSion Teh <hu...@magix.com.sg>]

hi
In a very simple e-Commerce site, using EJB is probably overkill. Let say
the site contains a ShoppingCart module and the cart info is stored in a
database.

I guess I have the options
 (a)XSP->ESQL->Database (directly manipulate cart info from XSP codes) or
 (b)XSP->My Java Class->Database
where in option (a) I develop a Java Class ShoppingCart that interface
between XSP code and database.

1. Does Option (b) makes sense?
2. What is the difference if I implement the Java Class ShoppingCart as
plain Java Class vs "implements JavaBeans" interface?
3. If I implement the ShoppingCart as JavaBean now, does it make it easier
to migrate to EJB in the future?

Regards

Re: Design Question

[Michael Bierenfeld <mi...@atmiralis.de>]

Hello,

HuiSion Teh wrote:
> 
> hi
> In a very simple e-Commerce site, using EJB is probably overkill. Let say
> the site contains a ShoppingCart module and the cart info is stored in a
> database.
> 
> I guess I have the options
>  (a)XSP->ESQL->Database (directly manipulate cart info from XSP codes) or
>  (b)XSP->My Java Class->Database
> where in option (a) I develop a Java Class ShoppingCart that interface
> between XSP code and database.
> 
> 1. Does Option (b) makes sense?

YES :-)

> 2. What is the difference if I implement the Java Class ShoppingCart as
> plain Java Class vs "implements JavaBeans" interface?

Whith JavaBeans you dont have to hack in the
SQL-Codes by yourself.

> 3. If I implement the ShoppingCart as JavaBean now, does it make it easier
> to migrate to EJB in the future?

Definitly yes. You can collect the experiences in
your fairly simple environment to be used
in more complex projects.

> 
> Regards
> 
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We started with the same approach (1). After a
while it turned out. That if we dont use Beans for
DatabaseAcces and processing of this Data the
application will not be maintainable. 

Regards

Michael