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Architectural styles and patterns

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  • 1. Architectural styles and patterns 1 Dr. Himanshu Hora SRMS College of Engineering & Technology, Bareilly INDIA
  • 2. 2  Architecture is a high level description of a solution to a problem  architecture (high level design) includes- 1. Main Components Functionalities and properties of components 2. Major Relations Components collaborating among the components What is architecture ?
  • 3. 3  An architectural style, sometimes called an architectural pattern  It provides an abstract framework for a family of systems  An architectural style improves partitioning and promotes design reuse by providing solutions to frequently recurring problems What is Architectural Style ?
  • 4. 4  An Architectural Style defines a set of rules that describe: - The way in which the components interact CATEGORY ARCHITECTURAL STYLE Communication Service-oriented architecture(SOA), Message Bus Deployment Client/server, N-tier, 3-tier Domain Domain driven design Structure Component Based ,Object -Oriented, Layered Architecture What is Architectural Style ?
  • 5. 5 • architecture styles and patterns as sets of principles that shape an application • some architectural styles describe deployment patterns, some describe structure and design issues, and others describe communication factors What is Architectural Style ?
  • 6. The Definition of Architecture Styles 6 R. N. Taylor, N. Medvidović and E. M. Dashofy, Software Architecture: Foundations, Theory and Practice. Wiley, 2009. “An architectural style is a named collection of architectural design decisions that (1) are applicable in a given development context, (2) constrain architectural design decisions that are specific to a particular system within that context, and (3) elicit beneficial qualities in each resulting system.”
  • 7. 7  An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context  Architectural patterns are often documented as software design pattern What is Architectural Patterns?
  • 8. 8  An architecture pattern is determined by- 1)A set of element types(such as data repository or a component) 2)A topological layout of the element indicating their interrelationships 3)A set of semantic constraints(e.g. filters in a pipe-and- filter style ) 4)A set of interaction mechanisms that shows how the elements coordinate through the allowed topology. What is Architectural Patterns?
  • 9. Figure- A small catalog of architectural patterns organized by is-a-relation
  • 10. 10 R. N. Taylor, N. Medvidović and E. M. Dashofy, Software architecture: Foundations, Theory and Practice. Wiley, 2009. "An architectural pattern is a named collection of architectural design decisions that are applicable to a recurring design problem, parameterized to account for different software development contexts in which that problem appears “ The Definition of Architecture pattern
  • 11. 11 The main difference is that a pattern can be seen as a solution to a problem, while a style is more general and does not require a problem to solve for its appearance. Difference between Pattern and Styles
  • 12. 12 Thank You Dr. Himanshu Hora SRMS College of Engineering & Technology, Bareilly INDIA

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