CSS 422 Week 2 Discussion: Design Patterns Supporting Activi

Css 422 Week 2 Discussiondesign Patternssupporting Activity Software

CSS 422 WEEK 2 Discussion Design Patterns Supporting Activity: Software Architecture Terminology Write a 50- to 150-word response to the following: 1. Discuss how some of these terms are related to each other. You may pick any three terms. Component, Connector, Configuration, Architecture style, Architecture pattern.

Supporting Activity: Process for Designing an Application Write a 50- to 100-word response to the following question: 2. Describe a good process for designing an application for which the development team has no prior experience in the domain of the application. Leverage one of your past experiences if necessary.

Software Engineering: Modern Approaches Write a 50- to 100-word response to the following questions: 3. How would you employ the agile practices of pair programming, frequent team interaction, and dedicated customer involvement in a distributed development environment? 4. Suppose, as a supporter of architecture practices, you were asked to write an Architecture Manifesto that was modeled on the Agile Manifesto. What would it look like? 5. Agile projects must be budgeted and scheduled like any other. How would you do that? Does architecture help or hinder this process? 6. What do you think are the essential skills for an architect operating in an agile context? How do you suppose they differ for an architect working in a non-Agile project? 7. The Agile Manifesto professes to value individuals and interactions over processes and tools. Rationalize these statements in terms of the role of tools in the modern software development process: compilers, integrated development environments, debuggers, configuration managers, automatic test tools, and build and configuration tools. 8. Critique the Agile Manifesto in the context of a 200-developer, 5-million-line project with an expected lifetime of 20 years.

Individual: Design Patterns Assignment: Prepare a 2-half page paper comparing and contrasting three of the design patterns listed. Choose any three from the list: Broker, Model-View-Controller, Pipe-and-Filter, Client-Server, Peer-to-Peer, Service-Oriented, Publish-Subscribe, Shared-Data, Map-Reduce, Multi-tier. First, describe what each of your selected design pattern choices has in common with each other. Second, describe what each of your selected design pattern choices is different from each other. Use appropriate external citations and references (minimum of 3), in addition to including references to the required readings/videos where relevant (at least 1). Be sure citations and references follow the University of Phoenix approved style guide format (the Written Assignments Guidelines, along with properly cited APA references). Please Note: Dictionary and Encyclopedia citations and references will not count towards your reference/citation count. Refer to the Instructor Policies to identify External and Internal references.

Paper For Above instruction

Introduction

Design patterns serve as foundational concepts in software engineering, providing reusable solutions to common problems in software design. Their relevance extends into various architectural and structural decisions within software systems. This paper compares three specific design patterns: Model-View-Controller (MVC), Client-Server, and Publish-Subscribe, analyzing their similarities and differences, supported by scholarly references to elucidate their roles in software architecture.

Commonalities Among the Selected Design Patterns

The MVC, Client-Server, and Publish-Subscribe patterns share a core focus on decoupling components to facilitate modularity and scalability. All three patterns promote separation of concerns: MVC separates the user interface, data, and business logic; Client-Server delineates roles between client requests and server responses; Publish-Subscribe decouples message publishers from subscribers, enabling asynchronous communication. This separation enhances maintainability and supports distributed systems architecture (Gamma et al., 1994; Buschmann et al., 1996). Additionally, these patterns emphasize reusability and flexibility in system design by defining clear interfaces and interactions among components (Shalloway & Trott, 2002).

Differences Among the Selected Design Patterns

Despite their common goals, the patterns significantly differ in their implementation and application context. MVC primarily governs user interface architecture within a single application, promoting a clear separation between UI components and data management (Fowler, 2003). In contrast, Client-Server architecture is a broader system-level pattern emphasizing network-based interaction between distributed components, suitable for implementing remote data access and service provision (Tanenbaum & Van Steen, 2007). Publish-Subscribe, on the other hand, facilitates asynchronous event-driven communication, commonly employed in message brokering and distributed event systems, where publishers and subscribers operate independently without direct knowledge of each other (Eugster et al., 2003). Moreover, the MVC pattern is primarily concerned with enhancing UI responsiveness, whereas Client-Server and Publish-Subscribe focus on system scalability and decoupling in distributed environments.

Conclusion

In summary, the MVC, Client-Server, and Publish-Subscribe patterns exemplify different approaches to component decoupling in software architecture, each suited to specific system requirements. Recognizing their similarities grounds understanding of modularity principles, while appreciating their differences guides appropriate pattern selection for project needs. The scholarly insights reinforce the importance of choosing the right pattern to meet scalability, maintainability, and responsiveness objectives in modern software systems.

References

• Buschmann, F., Stal, M., Rohnert, H., Sommerlad, P., & Schmidt, M. (1996). Pattern-Oriented Software Architecture Volume 1: A System of Patterns. Wiley.
• Eugster, P., Felber, P., Guerraoui, R., & Kermarrec, A.-M. (2003). The Many Faces of Publish/Subscribe. ACM Computing Surveys, 35(2), 114–131.
• Fowler, M. (2003). Patterns of Enterprise Application Architecture. Addison-Wesley.
• Gamma, E., Helm, R., Johnson, R., & Vlissides, J. (1994). Design Patterns: Elements of Reusable Object-Oriented Software. Addison-Wesley.
• Shalloway, A., & Trott, J. R. (2002). Design Patterns Illustrated. Addison-Wesley.
• Tanenbaum, A. S., & Van Steen, M. (2007). Distributed Systems: Principles and Paradigms. Prentice Hall.