BA471 - System Architectures

• Architectures:

• Satzinger et al. (p. 304): 3-layer architecture:
• Data layer: data repository.
• Business logic layer: "implements the rules of business processing"; the rules for building information from data.
• View layer: user interface rules; e.g., data to display (data layer) vs. format of the display (view layer).

• Components (Satzinger's 'layers') must act in a system. Hence,
• They are elements that must reside somewhere:
• Same machine.
• Different machines on same network.
• Different machines on different networks.

• They must communicate:
• Protocol (e.g., HTTP, SQL, etc.).
• Data exchange mechanism (e.g., shared memory, files, middleware (driver), HTTP, XML).

• They are arranged in a systematic way.

• Some examples of standard architectures:
  • BLT:

    

  • TeachEngineering:

    TE architecture