By Nick Rozanski

Software platforms structure, moment Edition is a very hot, practitioner-oriented consultant to designing and imposing powerful architectures for info platforms. it really is either a comfortably available creation to software program structure and a useful guide of well-established most sensible practices.

 

With this ebook you are going to find out how to

  • Design and converse an structure that displays and balances the several wishes of its stakeholders
  • specialise in architecturally major facets of layout, together with usually ignored components corresponding to functionality, resilience, and location
  • Use situations and styles to force the construction and validation of your architecture
  • rfile your structure as a collection of similar views

 

Reflecting new criteria and advancements within the box, this new version extends and updates a lot of the content material, and

  • Adds a “system context point of view” that records the system’s interactions with its environment
  • Expands the dialogue of architectural ideas, displaying how they are often used to supply traceability and motive for architectural decisions
  • Explains how agile improvement and structure can paintings together
  • Positions requisites and structure actions within the venture context
  • provides a brand new light-weight procedure for architectural validation

 

Whether you're an aspiring or training software program architect, you will discover your self referring again and again to the sensible recommendation during this publication during the lifecycle of your tasks. A aiding website containing additional details are available at www.viewpoints-and-perspectives.info.

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Additional resources for Software systems architecture : working with stakeholders using viewpoints and perspectives

Example text

EXAMPLE The AD for the airline reservation system referred to earlier focused strongly on the static structure (the key hardware and software elements) and to a lesser extent on its external behavior (the requests that users could make). Because most users would have a customer at a sales desk or on the end of a telephone, quick response time and system reliability are paramount. If the AD for such a system does not consider the quality properties of the system in any detail—in particular, if there is no clear definition of response-time requirements nor any performance models—it is quite likely that when the system is deployed, it will deliver poor performance, particularly under peak load.

We call these views. To help you decide what views to produce and what should go into any particular view, you use viewpoints, which are standardized definitions of view concepts, content, and activities. The use of views and viewpoints brings many benefits, such as separation of concerns, improved communication with stakeholders, and management of complexity. However, it is not without its pitfalls, such as inconsistency and fragmentation, and you must be careful to manage these. In this chapter, we introduced our viewpoint catalog, comprising the Functional, Information, Concurrency, Development, Deployment, and Operational viewpoints, which we describe in detail in Part III.

If the AD for such a system does not consider the quality properties of the system in any detail—in particular, if there is no clear definition of response-time requirements nor any performance models—it is quite likely that when the system is deployed, it will deliver poor performance, particularly under peak load. The solution to this is to identify a group of users who can agree on what the performance requirements are, and then the architect can balance these against what analysis and testing reveal is practically possible.

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