Systematic testing of software architectures in the c2 style

A method of selecting appropriate software architecture. Every architectural style describes a system category that includes the. An approach in evaluating software architecture is reasoning about the quality attributes a software architecture exhibits. Software professionals routinely make decisions that impact that architecture, yet many times that impact is not fully considered or well understood. 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. In this article, i will be briefly explaining the following 10 common architectural patterns with their usage, pros and. To protect business interests the quality of software applications, qa testers must be able to quickly and accurately identify and manage software testing risks. Architectural patterns are similar to software design pattern but have a broader scope. Thus, architecture style selection is important when design software system.

In the model of the software development process, as shown in chapter 2, architectural design is the first stage in the software design process. Software engineering architectural design geeksforgeeks. 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. Mark richards is a bostonbased software architect whos been thinking for more than 30 years about how data should flow through software. List of software architecture styles and patterns wikipedia. The c2 style focuses on the conceptual architecture of a system, independently of a particular implementation architecture. In a larger project, we would have a design phase that would specify the interface and behavior of the various modules in the system. Richardson 2 1 universita degli studi dellaquila dipartimento di informatica, via vetoio, 1 laquila. Software development can benefit from correct architecture style. Compsac97, 21st intl computer software and applications conference, august 1997, pp. The architecture of a software system is rarely limited to a single architectural style. When i first learned about integration testing, it was in the 1980s and the waterfall was the dominant influence of software development thinking. Each structure comprises software elements, relations among them, and properties of both elements and relations. 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 ntier, n refers to a number of tiers or layers are being used like 2tier, 3tier or 4tier, etc. The ntier architecture is an industryproven software architecture. Layered architecture software architecture patterns. There are multiple highlevel architecture patterns and principles commonly used in modern systems. Most complex software systems are required to be modifiable and have good performance. In addition, if conventional structures are used for an architectural style, the other stakeholders can easily understand the organization of the system. An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. Software test architecture design focusing on test viewpoints. Abstract this article presents a model for describing the architecture of software intensive systems, based on the use of multiple, concurrent views. 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. Citeseerx document details isaac councill, lee giles, pradeep teregowda.

The architecture of a software system is a metaphor, analogous to the architecture of a building. Architectural design is concerned with understanding how a system should be organized and designing the overall structure of that system. A software architecture based testing technique zhenyi jin, ph. Software architecture software engineering institute. Richardson 2 1 universita degli studi dellaquila dipartimento di informatica, via vetoio, 1 laquila italy. 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.

Recent work on the topic has used the sa as a reference model for code conformance testing, to check if an. 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. The software that is built for computerbased systems can exhibit one of these many architectural styles. A good architecture is important, otherwise it becomes slower and more expensive to add new capabilities in the future. The chosen software architecture supports the key sizing and timing requirements, as stipulated in the supplementary specification 15. Systematic testing of software architectures in the c2 style conference paper pdf available in lecture notes in computer science 2984. These are often referred to as architectural styles. Instead, a combination of styles often make up the complete system. 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. Preliminary classification of architectural styles for software systems, m. Systematic testing of software architectures in the c2 style henry muccini 1, marcio dias 2 and d. Software components may be written in different programming languages. Software architecture in practice, chapter sc97 a field guide to boxology.

The topic of software architecture sa based testing has recently raised some interest. Architectural styles an architectural style is a named collection of architectural design decisions that. A component and messagebased architectural style c2. Paper published in ieee software 12 6 november 1995, pp. The three fundamental steps in managing these concerns are. In this paper, we extend previous approaches, by providing a systematic way to perform the refinement step.

Software architecture refers to the fundamental structures of a software system and the discipline of creating such structures and systems. 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. Systematic testing of software architectures in the c2 style. 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. Systematic defense product support is a structured, scalable service we provide in the united states and other locations around the world. Layered architecture the most common architecture pattern is the layered architecture pattern, otherwise known as the ntier architecture pattern. Citeseerx systematic testing of software architectures. His new free book, software architecture patterns, focuses on five architectures that are commonly used to organize software systems. Such specifications reduce the cognitive load on designers and enable systemlevel analysis and code generation. Components and connectors have a defined top and bottom that cause them to be arranged in layers. A system s software architecture is widely regarded as one of the most important software artifacts. 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.

Architectural patterns are often documented as software design patterns. The system shall support up to 2000 simultaneous users against the central database at any given time, and up to 500 simultaneous users against the local servers at. C2 software architecure c2 is a architectural software style developed by the institute for software research at the university of california, irvine. This paper discusses testing approach of component interaction for c2 style architecture. Testing approach of component interaction for software. N tiermultitier, 3tier, 2tier architecture with example.

We have developed an adl for c2style architectures. Adls enable software architects to express high level system structure by describing its coarsegrained components and connections among them. C2 is an asynchronous, eventbased architectural style, which promotes reuse, dynamism, and flexibility through limited visibility. 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.

The small set of abstractions and diagram types makes the c4 model easy to learn and use. 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. Systematic testing of software architectures in the c2 style springerlink. 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. This architecture model provides software developers to create reusable applicationsystems with maximum flexibility.