Transaction server architecture presentation logic

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Unformatted text preview: I/O Processing Logic Application Business Logic Data Management Logic Data Manipulation Logic APPLICATION SERVER Client-Side Client Side ClientSide Client Side Server-Side Server Side BUSI 335 46 Logic Splitting in C/S (cont’d) 3. Transaction server architecture Presentation Logic Server Side Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 47 BUSI 335 Server-Side Server Side Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 48 Three-Tier Architectures: Framework Logic Splitting in C/S (cont’d) SUMMARY Presentation Logic I/O Processing Logic Application Business Logic Data Management Logic • Require gateways to legacy systems. • Example: client, HTTP server, and database server Data Manipulation Logic (3 different computers!) FILE SERVER Server-Side Client Side Client-Side Server Side DATABASE SERVER Server-Side Client Side Client-Side Server Side TRANSACTION SERVER Client Side Client-Side Server-Side Server Side APPLICATION SERVER ClientSide Client Side BUSI 335 Server-Side Server Side Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 49 BUSI 335 Thin Clients and the Internet • A glue of 3-tier architectures • Software that sits between the business applications and the extremely thin client hardware and operating systems • Some Functions: – Insulates the applications from unique hardware and operation system interfaces – Improve the application’s reusability and help attain platform independence – Enables clients to access different data sources – Controls and manages access to distributed data through distributed transactions – Coordinate concurrency between multiple simultaneous users – Checks security permissions – freely available for most platforms – rudimentary presentation logic only • Hyper Text Mark-up Language (HTML) → simple text, tables and forms – built-in support for network communication (via standard Internet protocol) Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 50 Middleware • Standard internet browsers provide an BUSI 335 Copyright © 2009-10 Y.M. Cheung, Wil...
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