Software Architecture Design Patterns
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Presentation for English class in Tallinn University of Technology. Based on book "Patterns Of Enterprise Application Architecture" introduction part.
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Software Architecture Design Patterns
- 2. Content Important Terms Usage of Patterns Three Principal Layers Example
- 3. Important Terms Software Architecture „ Software architecture is the high level structure of a software system, the discipline of creating such structures, and the documentation of these structures“
- 4. Important Terms Pattern An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. Architectural patterns are similar to software design patterns but have a broader scope.
- 5. Usage of Patterns Reasons : Part of software documentation Reduce time consuption Reduce costs of application maintance Language neutral
- 6. Usage of Patterns Layering is common technique of defining a parts of application where patterns should be applyed. A program layer is an independent operating component of a software program.
- 7. Usage of Patterns Benefits of layering : You can understanding of a single layer as a coherent whole without knowing much about the other layers You can substitute layers with alternative implementations of the same basic services You minimize dependencies between layers Once you have a layer built, you can use it for many higher-level services
- 8. Usage of Patterns Three Principal Layers Presentation layer Data source layer Domain logic layer
- 9. Three Principal Layers Presentation layer Provision of services, display of information (e.g., in Windows or HTML, handling of user request (mouse clicks, keyboard hits), HTTP requests, command-line invocations, batch API) Examples: Model View Controller Page Controller Front Controller Template View Transform View Two Step View Application Controller
- 10. Three Principal Layers Data source layer Communication with databases, messaging systems, transaction managers, other packages Examples: Table Data Gateway Row Data Gateway Active Record Data Mapper
- 11. Three Principal Layers Domain logic layer Logic that is the real point of the system Examples: Transaction Script Domain Model Table Module Service Layer
- 12. Three Principal Layers Best practice : One layer – one solution.
- 13. Example
- 14. Example
- 15. Example
- 16. Example