February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Section 30.3 Multitier Application Architecture
• Web-based applications are multitier (n-tier) applications (p. 6) that divide functionality into separate tiers (i.e., logical groupings of functionality). Although tiers can be located on the same computer, the tiers of web-based applications often reside on separate computers.
• The information tier (p. 7) maintains data pertaining to the application.
• The middle tier (p. 7) implements business logic, controller logic and presentation logic to control interactions between the application’s clients and the application’s data. Business logic in the middle tier enforces business rules and ensures that data is reliable before the server application updates the database or presents the data to users. ...
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