|SUMit Roster Software > Nut's Weekly > September 2000 > Layers||Nederlands · Search...|
|Monday, 11 September 2000||July 2000 August 2000 Style Rigid Drum October 2000 November 2000|
How does a 3-tier architecture work?
What goes where?
I got these questions last week, at the start of
a new project.
Here are the answers, a personal point of view:
The 3 layers
1. The GUI layerThe GUI is the "top layer". It contains all things that are visible to the user, the 'outside' of the system, such as screen layout and navigation.
2. The Object layerThis is the core of the system, the linking pin between the other layers. The object layer has knowledge, in two different ways:
3. Database LayerThe database layer takes care of persistency. An object from the object layer can write itself to one or more tables. In the database layer you'll find things like database, connection, table, SQL and result set.
|Born on 9 sep 2000: Mats Joost Rutger Hage (home.planet.nl/~hage0000). Congratulations to my cousin Ester!|
· October 2000
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