An Evaluation of Real-Time Transaction Services in Web Services E-Business Systems

2009 ◽  
pp. 532-537
Author(s):  
Hong-Ren Chen
Keyword(s):  
Web Services ◽  
Real Time ◽  
Business Systems ◽  
Transaction Services

Service Discovery Framework for Distributed Embedded Real-Time Systems

2014 ◽  
pp. 126-147 ◽  
Author(s):  
Furkh Zeshan ◽  
Radziah Mohamad ◽  
Mohammad Nazir Ahmad
Keyword(s):  
Web Services ◽  
Real Time ◽  
Context Awareness ◽  
Service Discovery ◽  
Low Cost ◽  
High Volume ◽  
Heterogeneous Environments ◽  
Real Time Systems ◽  
Loosely Coupled ◽  
Time Systems

Embedded systems are supporting the trend of moving away from centralised, high-cost products towards low-cost and high-volume products; yet, the non-functional constraints and the device heterogeneity can lead to system complexity. In this regard, Service-Oriented Architecture (SOA) is the best methodology for developing a loosely coupled, dynamic, flexible, distributed, and cost-effective application. SOA relies heavily on services, and the Semantic Web, as the advanced form of the Web, handles the application complexity and heterogeneity with the help of ontology. With an ever-increasing number of similar Web services in UDDI, a functional description of Web services is not sufficient for the discovery process. It is also difficult to rank the similar services based on their functionality. Therefore, the Quality of Service (QoS) description of Web services plays an important role in ranking services within many similar functional services. Context-awareness has been widely studied in embedded and real-time systems and can also play an important role in service ranking as an additional set of criteria. In addition, it can enhance human-computer interaction with the help of ontologies in distributed and heterogeneous environments. In order to address the issues involved in ranking similar services based on the QoS and context-awareness, the authors propose a service discovery framework for distributed embedded real-time systems in this chapter. The proposed framework considers user priorities, QoS, and the context-awareness to enable the user to select the best service among many functional similar services.

Challenges for Deploying Web Services-Based E-Business Systems in SMEs

2011 ◽  
pp. 2029-2046
Author(s):  
Ranjit Bose ◽  
Vijayan Suumaran
Keyword(s):  
Web Services ◽  
Development Process ◽  
Programming Model ◽  
Systematic Investigation ◽  
Vital Role ◽  
Employment Opportunity ◽  
Business Systems ◽  
Application Development ◽  
Business Context ◽  
Wait And See

E-business initiative in many companies had started in the 1990s. These companies have recently begun to explore the use of Web Services (WS) technologies within their e-business context, since they provide an attractive, language-neutral, environment-neutral programming model that accelerates application development and integration inside and outside the enterprise. Despite these advantages, companies are slow to deploy WS because it requires a considerable shift in their application development process. While a few studies have reported on some of the reasons for this wait-and-see approach, a thorough and systematic investigation of the challenges from the stakeholders’ — providers, consumers, and standards organizations — perspective is needed. This study addresses that and provides a framework for studying the factors that impact the deployment and use of WS. The framework is used to analyze small and medium-sized enterprises (SMEs), as they play a vital role in generating employment opportunity and turnover within many major economies globally.

Formalizing Timed BPEL by D-LOTOS

2014 ◽  
Vol 5 (2) ◽  
pp. 1-21
Author(s):  
Imed Eddine Chama ◽  
Nabil Belala ◽  
Djamel Eddine Saidouni
Keyword(s):  
Web Services ◽  
Formal Verification ◽  
Real Time ◽  
Formal Representation ◽  
The Real ◽  
True Concurrency ◽  
Transformation Approach ◽  
Abstract Specification

Different standards and languages are proposed in the literature to model the composition of Web services. Unfortunately these languages are essentially syntactic and thus contain much ambiguity and inconsistency. In addition, the formal verification of the proposed languages is impossible. In this paper, the authors propose a transformation approach allowing the formal representation, analysis and refinement of Web services compositions. Both timed constraints and the durations of interactions between these services are taken into account. The authors present a mapping from Web services described in the BPEL language to an abstract specification written in the real-time language D-LOTOS which is based on true-concurrency semantics.

Service Discovery

2011 ◽  
pp. 107-127
Author(s):  
Gerhard Austaller
Keyword(s):  
Web Services ◽  
Real Time ◽  
Service Provider ◽  
Service Discovery ◽  
Business Processes ◽  
Software Component ◽  
Service Oriented Architectures ◽  
Network Connection ◽  
Service Oriented ◽  
The Moment

The chapter “Ubiquitous Services and Business Processes” discussed the benefits for real time enterprises of service oriented architectures (SOA) in terms of reusability and flexibility. Web services are one incarnation of SOA. This chapter gives a brief introduction to SOA. It discusses the attributes that define SOA, the roles of the participants in a service oriented environment. The essence of SOA is that clients use services offered by a service provider to get a task done. For the moment we simplify service to “a software component with network connection”. Services are offered with a description at wellknown “places” (also called registries, repositories), where clients choose services according to their needs. The chapter discusses several approaches to describe services and to look for them. Moreover, some well-known systems, and also current research, are discussed.

Service-Oriented Architecture

2011 ◽  
pp. 998-1002
Author(s):  
Kwan-Ming Wan ◽  
Pouwan Lei ◽  
Chris Chatwin ◽  
Rupert Young
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Core Competencies ◽  
Enterprise Application Integration ◽  
The Internet ◽  
Business Systems ◽  
Loosely Coupled ◽  
Enterprise Application ◽  
Tightly Coupled ◽  
Service Oriented

The established global business environment is under intense pressure from Asian countries such as Korea, China, and India. This forces businesses to concentrate on their core competencies and adopt leaner management structures. The coordination of activities both within companies and with suppliers and customers has become a crucial competitive advantage. At the same time, the Internet has transformed the way in which businesses run. As the Internet becomes a cheap and effective communication channel, businesses are quick to adopt the Web for integrating their systems together and linking them with their suppliers and customers. Current enterprise computing using J2EE (Java 2 Platform, Enterprise Edition) has yielded systems in which the coupling between various components in them are too tight to be effective for ubiquitous B2B (business-to-business) and B2C (business-to-consumer) e-business over the Internet. This approach requires too much agreement and shared context between business systems from different organizations. There is a need to move away from tightly coupled, monolithic systems and toward systems of loosely coupled, dynamically bound components. The emerging technology, Web services, provides the tools to accomplish this integration, but this approach presents many new challenges and problems that must be overcome. In this article, we will discuss the current approaches in enterprise application integration (EAI) and the limitations. There is also a need for service-oriented applications, that is, Web services. Finally, the challenges in implementing Web services are outlined.

RDTA

2014 ◽  
Vol 5 (3) ◽  
pp. 42-67
Author(s):  
Fateh Latreche ◽  
Faiza Belala
Keyword(s):  
Web Services ◽  
Real Time ◽  
Formal Model ◽  
Timed Automata ◽  
Web Services Composition ◽  
Composite Service ◽  
The Real ◽  
Services Composition ◽  
Dynamic Web ◽  
Natural Way

Web services are very dynamic, they are all around us and we use them every day without even knowing it. In this paper, the authors define a formal model for dynamic Web services composition and they investigate how it can be used to specify and analyse backward recovery procedures, updating partner services in case of failure. First, they propose Recursive and Dynamic Timed Automata (RDTA) model, interpreted over composite service configurations, which provide a natural way to design stateful and dynamic Web services. Then, the authors define the concurrent semantics of this timed automata extension in terms of real-time rewrite theories. Analysis of the model is carried out in the Real-Time Maude system, based on checking relevant properties.

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