Systematic testing of software architectures in the c2 style

When i first learned about integration testing, it was in the 1980s and the waterfall was the dominant influence of software development thinking. Instead, a combination of styles often make up the complete system. Risk is the future of uncertainty among events that have a probability of occurrence and a potential for loss. Architectural patterns are similar to software design pattern but have a broader scope. The architecture of a software system is a metaphor, analogous to the architecture of a building. The three fundamental steps in managing these concerns are. Software professionals routinely make decisions that impact that architecture, yet many times that impact is not fully considered or well understood. Mark richards is a bostonbased software architect whos been thinking for more than 30 years about how data should flow through software.

Software components may be written in different programming languages. The small set of abstractions and diagram types makes the c4 model easy to learn and use. Testing approach of component interaction for software. Components and connectors have a defined top and bottom that cause them to be arranged in layers. Software architecture refers to the fundamental structures of a software system and the discipline of creating such structures and systems. This architecture model provides software developers to create reusable applicationsystems with maximum flexibility. Software architecture software engineering institute. There are multiple highlevel architecture patterns and principles commonly used in modern systems. An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. C2 focuses on the construction of flexible and extensible software system by means of a component and message based architecture.

The achievement of a software system s quality attributes depends much more on the software architecture than on coderelated issues such as language choice, finegrained design, algorithms, data structures, testing, and so forth. The chosen software architecture supports the key sizing and timing requirements, as stipulated in the supplementary specification 15. The software that is built for computerbased systems can exhibit one of these many architectural styles. List of software architecture styles and patterns wikipedia. Architectural patterns are often documented as software design patterns. A software architecture based testing technique zhenyi jin, ph. When people in the software industry talk about architecture, they refer to a hazily defined notion of the most important aspects of the internal design of a software system. This paper discusses testing approach of component interaction for c2 style architecture. In ntier, n refers to a number of tiers or layers are being used like 2tier, 3tier or 4tier, etc. N tiermultitier, 3tier, 2tier architecture with example. Paper published in ieee software 12 6 november 1995, pp. The ntier architecture is an industryproven software architecture. Such specifications reduce the cognitive load on designers and enable systemlevel analysis and code generation.

Jefferson offutt this dissertation defines a formal technique to test software systems at the architectural level, particularly for software systems developed using software architecture description languages adl. His new free book, software architecture patterns, focuses on five architectures that are commonly used to organize software systems. Software development can benefit from correct architecture style. Software test architecture design focusing on test viewpoints.

A good architecture is important, otherwise it becomes slower and more expensive to add new capabilities in the future. Systematic defense product support is a structured, scalable service we provide in the united states and other locations around the world. Systematic testing of software architectures in the c2 style. Most complex software systems are required to be modifiable and have good performance. The architecture of a software system is rarely limited to a single architectural style. The c2 style focuses on the conceptual architecture of a system, independently of a particular implementation architecture. George mason university, fall 2000 dissertation director.

Foundations, theory, and practice scope of architectural analysis component and connectorlevel subsystem and system level data exchanged in a system or subsystem data structure data flow properties of data exchange architectures at different abstraction levels comparison of two or more architectures processing data. In software development, software architecture is not described in project plan though test architecture is described in test plan what kinds of test you design should be prior to order of test cases test architecture consists of test viewpoints and relationships of them ngt notation for generic testing is a madeinjapan. Abstract this article presents a model for describing the architecture of software intensive systems, based on the use of multiple, concurrent views. Richardson 2 1 universita degli studi dellaquila dipartimento di informatica, via vetoio, 1 laquila italy. Systematic testing of software architectures in the c2 style henry muccini 1, marcio dias 2 and d. In addition, if conventional structures are used for an architectural style, the other stakeholders can easily understand the organization of the system. Software architecture in practice, chapter sc97 a field guide to boxology. Citeseerx systematic testing of software architectures. We have developed an adl for c2style architectures. The best way to plan new programs is to study them and understand their strengths and weaknesses. Each structure comprises software elements, relations among them, and properties of both elements and relations. In this paper, we extend previous approaches, by providing a systematic way to perform the refinement step.

The c4 model is an abstractionfirst approach to diagramming software architecture, based upon abstractions that reflect how software architects and developers think about and build software. Thus, architecture style selection is important when design software system. Systematic testing of software architectures in the c2 style springerlink. An approach in evaluating software architecture is reasoning about the quality attributes a software architecture exhibits. A system s software architecture is widely regarded as one of the most important software artifacts. Software engineering architectural design geeksforgeeks. In a larger project, we would have a design phase that would specify the interface and behavior of the various modules in the system. These are often referred to as architectural styles. Compsac97, 21st intl computer software and applications conference, august 1997, pp.

Ieee defines architectural design as the process of defining a collection of hardware and software components and their interfaces to establish the framework for the development of a computer system. Every architectural style describes a system category that includes the. Systematic testing of software architectures in the c2 style conference paper pdf available in lecture notes in computer science 2984. In this article, i will be briefly explaining the following 10 common architectural patterns with their usage, pros and.

Recent work on the topic has used the sa as a reference model for code conformance testing, to check if an. The c2 architectural style is designed to support the particular needs of applications that have a graphical user interface aspect, but it has the potential for supporting other types of applications as well. Architectural design is concerned with understanding how a system should be organized and designing the overall structure of that system. A component and messagebased architectural style c2. Preliminary classification of architectural styles for software systems, m. The software architecture of a program or computing system is the structure or structures of the system, which comprise software components, the externally visible properties of those components, and the relationships among them. In the model of the software development process, as shown in chapter 2, architectural design is the first stage in the software design process. A method of selecting appropriate software architecture.

To protect business interests the quality of software applications, qa testers must be able to quickly and accurately identify and manage software testing risks. C2 software architecure c2 is a architectural software style developed by the institute for software research at the university of california, irvine. C2 is an asynchronous, eventbased architectural style, which promotes reuse, dynamism, and flexibility through limited visibility. We show how choosing a specific architectural style, which supports implementation and facilitates the mapping among sabased and codebased test cases, a completely systematic sabased testing approach can be delivered. The architectural elements will be interconnected in wellknown manner to get the major functionality and performance requirements of the system and to obtain nonfunctional requirements such as. Software architecture diagrams are a fantastic way to communicate how you are planning to build a software system upfront design or how an existing software system works retrospective. The topic of software architecture sa based testing has recently raised some interest. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Layered architecture software architecture patterns. Abstract software architecture style is a proven reusable solution for known problems that in order to save huge cost and reduce risks. Our support organization is designed to comply with international standards in bestpractice procedures to ensure queries are dealt with in a prompt and efficient manner. Recent work on the topic has used the sa as a reference model for code conformance testing, to check if an implementation fulfills conforms to its specification at the sa level.