Web Comprehension by UML Stereotypes

Abstract Web applications use components developed in various technologies through an abstraction space richer than that of the object oriented paradigm. The architecture of web applications can be represented by showing specific web components, their compositions, navigations and inter-component relationships. In this research, we propose a component-centric UML based approach for modeling the architecture of web applications. Our approach is based on a classification of components and intercomponent relationships that typically occur in web applications. We use UML extension mechanisms to represent specific web components. Keywords UML, Components, Profile, Modeling, OMG, Framework I. Introduction A typical web application uses components developed in various technologies through an abstraction space richer than that of the object oriented paradigm. Web applications have concepts like session and cookies, which are specific to the domain of web applications. The aim of this project is to develop a UML based modeling language for describing the architecture of web applications. This language should be able to specify, design and document the functionality and behavior of a web application that could be developed using any of the available web technologies. Our work includes the use of UML extension mechanisms to describe web specific components and their relationships with other web components and traditional middle-tier elements. Our final goal is to design various diagrams for modeling static and dynamic behavior of the web applications precisely. In this chapter, we will first introduce the scope of UML in design and development of software systems. Then we explain the need for UML extensions to describe the architecture of web applications. Next we present a summary of already proposed UML extensions and introduce our approach for modeling the architecture of web applications. UML is a standard and industry accepted graphical modeling language to model the software systems. However, since it is a general purpose modeling language, it lacks elements to model and represent concrete concepts of specific domains. This lack of expressiveness also exists for the domain of web applications. As a solution, OMG (Object Management Group) has created a mechanism for extending the syntax and semantic of UML to express more specific concepts of certain application domains

MDA-based ATL transformation to generate MVC 2 web models

Development and maintenance of Web application is still a complex and error-prone process. We need integrated techniques and tool support for automated generation of Web systems and a ready prescription for easy maintenance. The MDA approach proposes an architecture taking into account the development and maintenance of large and complex software. In this paper, we apply MDA approach for generating PSM from UML design to MVC 2Web implementation. That is why we have developed two meta-models handling UML class diagrams and MVC 2 Web applications, then we have to set up transformation rules. These last are expressed in ATL language. To specify the transformation rules (especially CRUD methods) we used a UML profiles. To clearly illustrate the result generated by this transformation, we converted the XMI file generated in an EMF (Eclipse Modeling Framework) model.Comment: International Journal of Computer Science & Information Technology-201

Distribution pattern-driven development of service architectures

Distributed systems are being constructed by composing a number of discrete components. This practice is particularly prevalent within the Web service domain in the form of service process orchestration and choreography. Often, enterprise systems are built from many existing discrete applications such as legacy applications exposed using Web service interfaces. There are a number of architectural configurations or distribution patterns, which express how a composed system is to be deployed in a distributed environment. However, the amount of code required to realise these distribution patterns is considerable. In this paper, we propose a distribution pattern-driven approach to service composition and architecting. We develop, based on a catalog of patterns, a UML-compliant framework, which takes existing Web service interfaces as its input and generates executable Web service compositions based on a distribution pattern chosen by the software architect

A Practical Example for Model-Driven Web Requirements

The number of approaches for Web environments has grown very fast in the last years: HDM, OOHDM, and WSDM were among the first, and now a large number can be found in the literature. With the definition of MDA (Model- Driven Architecture) and the acceptance of MDE (Model-Driven Engineering) techniques in this environment, some groups are working in the use of metamodels and transformations to make their approaches more powerful. UWE (UMLBased Web Engineering) or OOWS (Object-Oriented Web Solutions) are only some examples. However, there are few real experiences with Web Engineering in the enterprise environment, and very few real applications of metamodels and MDE techniques. In this chapter the practical experience of a Web Engineering approach, NDT, in a big project developed in Andalusia is presented. Besides, it shows the usability of metamodels in real environments

Semantic model-driven development of service-centric software architectures

Service-oriented architecture (SOA) is a recent architectural paradigm that has received much attention. The prevalent focus on platforms such as Web services, however, needs to be complemented by appropriate software engineering methods. We propose the model-driven development of service-centric software systems. We present in particular an investigation into the role of enriched semantic modelling for a modeldriven development framework for service-centric software systems. Ontologies as the foundations of semantic modelling and its enhancement through architectural pattern modelling are at the core of the proposed approach. We introduce foundations and discuss the benefits and also the challenges in this context

Forum Session at the First International Conference on Service Oriented Computing (ICSOC03)

The First International Conference on Service Oriented Computing (ICSOC) was held in Trento, December 15-18, 2003. The focus of the conference ---Service Oriented Computing (SOC)--- is the new emerging paradigm for distributed computing and e-business processing that has evolved from object-oriented and component computing to enable building agile networks of collaborating business applications distributed within and across organizational boundaries. Of the 181 papers submitted to the ICSOC conference, 10 were selected for the forum session which took place on December the 16th, 2003. The papers were chosen based on their technical quality, originality, relevance to SOC and for their nature of being best suited for a poster presentation or a demonstration. This technical report contains the 10 papers presented during the forum session at the ICSOC conference. In particular, the last two papers in the report ere submitted as industrial papers