Systematic testing of software architectures in the c2 style

Software professionals routinely make decisions that impact that architecture, yet many times that impact is not fully considered or well understood. There are multiple highlevel architecture patterns and principles commonly used in modern systems. An approach in evaluating software architecture is reasoning about the quality attributes a software architecture exhibits. This paper discusses testing approach of component interaction for c2 style architecture. Abstract software architecture style is a proven reusable solution for known problems that in order to save huge cost and reduce risks. C2 is an asynchronous, eventbased architectural style, which promotes reuse, dynamism, and flexibility through limited visibility. Each structure comprises software elements, relations among them, and properties of both elements and relations. Software architecture in practice, chapter sc97 a field guide to boxology. Risk is the future of uncertainty among events that have a probability of occurrence and a potential for loss. The architecture of a software system is rarely limited to a single architectural style. An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. In addition, if conventional structures are used for an architectural style, the other stakeholders can easily understand the organization of the system. Every architectural style describes a system category that includes the. A computerbased system software is part of this system exhibits one of the many available architectural styles.

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. Software architecture software engineering institute. 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. 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. 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. Architectural styles an architectural style is a named collection of architectural design decisions that. 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. The three fundamental steps in managing these concerns are. Citeseerx document details isaac councill, lee giles, pradeep teregowda.

A good architecture is important, otherwise it becomes slower and more expensive to add new capabilities in the future. 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. Testing approach of component interaction for software. Citeseerx systematic testing of software architectures. Adls enable software architects to express high level system structure by describing its coarsegrained components and connections among them. Layered architecture the most common architecture pattern is the layered architecture pattern, otherwise known as the ntier architecture pattern.

Mark richards is a bostonbased software architect whos been thinking for more than 30 years about how data should flow through software. 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. Layered architecture software architecture patterns. To protect business interests the quality of software applications, qa testers must be able to quickly and accurately identify and manage software testing risks. The best way to plan new programs is to study them and understand their strengths and weaknesses. 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 ntier, n refers to a number of tiers or layers are being used like 2tier, 3tier or 4tier, etc. A method of selecting appropriate software architecture. This architecture model provides software developers to create reusable applicationsystems with maximum flexibility.

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. George mason university, fall 2000 dissertation director. A software architecture based testing technique zhenyi jin, ph. The architecture of a software system is a metaphor, analogous to the architecture of a building. 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. Such specifications reduce the cognitive load on designers and enable systemlevel analysis and code generation. Architectural patterns are often documented as software design patterns. The topic of software architecture sa based testing has recently raised some interest. The software that is built for computerbased systems can exhibit one of these many architectural styles. Architectural patterns are similar to software design pattern but have a broader scope. A system s software architecture is widely regarded as one of the most important software artifacts. Systematic testing of software architectures in the c2 style springerlink.

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. Recent work on the topic has used the sa as a reference model for code conformance testing, to check if an. Thus, architecture style selection is important when design software system. Software architecture refers to the fundamental structures of a software system and the discipline of creating such structures and systems. N tiermultitier, 3tier, 2tier architecture with example. Architectural design is concerned with understanding how a system should be organized and designing the overall structure of that system. Compsac97, 21st intl computer software and applications conference, august 1997, pp. Systematic testing of software architectures in the c2 style henry muccini 1, marcio dias 2 and d.

Paper published in ieee software 12 6 november 1995, pp. In the model of the software development process, as shown in chapter 2, architectural design is the first stage in the software design process. In this article, i will be briefly explaining the following 10 common architectural patterns with their usage, pros and. 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. C2 focuses on the construction of flexible and extensible software system by means of a component and message based architecture. C2 software architecure c2 is a architectural software style developed by the institute for software research at the university of california, irvine. Richardson 2 1 universita degli studi dellaquila dipartimento di informatica, via vetoio, 1 laquila. Components and connectors have a defined top and bottom that cause them to be arranged in layers. Software development can benefit from correct architecture style. The small set of abstractions and diagram types makes the c4 model easy to learn and use. List of software architecture styles and patterns wikipedia. Software engineering architectural design geeksforgeeks. 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. 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.

Software components may be written in different programming languages. We have developed an adl for c2style architectures. Systematic testing of software architectures in the c2 style. 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 paper, we extend previous approaches, by providing a systematic way to perform the refinement step. Systematic testing of software architectures in the c2 style conference paper pdf available in lecture notes in computer science 2984. Instead, a combination of styles often make up the complete system. Software test architecture design focusing on test viewpoints. Systematic defense product support is a structured, scalable service we provide in the united states and other locations around the world. The chosen software architecture supports the key sizing and timing requirements, as stipulated in the supplementary specification 15. Most complex software systems are required to be modifiable and have good performance.

When i first learned about integration testing, it was in the 1980s and the waterfall was the dominant influence of software development thinking. Preliminary classification of architectural styles for software systems, m. 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. The ntier architecture is an industryproven software architecture. 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. His new free book, software architecture patterns, focuses on five architectures that are commonly used to organize software systems. The c2 style focuses on the conceptual architecture of a system, independently of a particular implementation architecture. A component and messagebased architectural style c2.