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2 tier ?

 
Liviu Carausu
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Hi,
I have B&S application.
I have read the discussions about 2/3 tier decision.
I'm a two tier fan considering the specifications( which means that I want to expose to the clients the methods from the Sun specified interface - with lock/unlock)
Had anybody presented such a solution to Sun and it failed the exam because of choosing the 2 tier model ?
Or, asking another way, had somebody passed the exam with 2 tier model ?
Thanks,
Liviu
 
Mihai Radulescu
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Posts: 918
IntelliJ IDE Java Linux
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Hi Liviu

I am one of the "3 trier" guys.
In my specification I have some thing like :


The following are the "top level" features that must be implemented:
A client program with a graphical user interface that connects to the database
A data access system that provides record locking and a flexible search mechanism
Network server functionality for the database system


So : 1.presentation layer (the GUI), 2.Service layer (Network functionality) and 3.Data Access Layer, so as you can see we have only four layers here

The lock/unlock and them visibility on the client side is a client (side) decision. I choose to hide them - this have advantages and disadvantages - and I document my decision. I think that there is no perfect solution, at the end is just a question of identify the problems, take the decisions and
justify them.

Regards M
 
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