Creation of N-TIER MODEL (and use of webservices)
Posted on 2005-05-13
I've build an N-Tier Model and would like to know if I'm going the right way... (it's the first time I'm building such model)
My N-Tier Model actually looks like this :
Windows User Controls
Content of the following layers :
Windows Forms (exe): only forms (user interface);
The windows forms layer has access to the Win User Controls, Business Workflow and Common class.
Windows User Controls (dll) : own and external usercontrols or dlls;
The windows User controls layer has access to the Business Workflow and Common class.
Business Workflow (dll): workflow of 'business logic'-functions;
The business workflow layer has access to the business logic and Common class.
Business Logic (dll): functions like : build tree, fill grid, calculate, ...;
The business logic layer has access to the data factory and common class.
Data Factory (dll): functions that will execute queries to the database. (ex. fill user information, get list of customers,...);
The data factory layer has access to the data acces and common class.
Data Access (dll): functions : create connection with database, destruct connection, execute queries with or without results;
The data access layer has access to the common class.
Common class : global functions : write to log, format sql queries, format datetime,... .
The common class layer has access to nothing.
I also want to use webservices. Do I've to use 1 or several webservices? Which layer will be located in which webservice?
Maybe I only have to use 2 webservices :
Webservice 1 contains :
* the business workflow layer;
* the business logic layer;
* the common class layer.
Webservice 2 contains :
* the data factory layer;
* the data access layer.
Thanks a lot for your help !