CONCRETE SOLUTIONS FOR WEB SERVICES ADAPTABILITY USING POLICIES AND ASPECTS

2006 ◽  
Vol 15 (03) ◽  
pp. 415-438 ◽  
Author(s):  
RICARDO FERRAZ TOMAZ ◽  
MEHDI BEN HMIDA ◽  
VALERIE MONFORT
Keyword(s):  
Information Systems ◽  
Web Services ◽  
Web Service ◽  
Design Solution ◽  
Technical Solution ◽  
Loose Coupling ◽  
Aspect Oriented Programming ◽  
Service Oriented Architectures ◽  
Service Oriented ◽  
Service Behavior

Traditional middleware is usually developed on monolithic and non-evolving entities, resulting in a lack of flexibility and interoperability. Among current architectures, Service Oriented Architectures aim to easily develop more adaptable Information Systems. Most often, Web Service is the fitted technical solution which provides the required loose coupling to achieve such architectures. However, there is still much to be done in order to obtain a genuinely flawless Web Service, and current market implementations still do not provide adaptable Web Service behavior depending on the service contract. In this paper, we present our two last years of work toward a more adaptable SOA. We proposed two approaches that consider Aspect Oriented Programming (AOP) as a new design solution for Web Services. The two approaches enable us to glue new non-functional behaviors to a Web Service without going back to modify, recompile, retest and finally redeploy it.

When Parameterized Model Driven Development Supports Aspect Based SOA

2012 ◽  
pp. 211-230
Author(s):  
Valérie Monfort ◽  
Slimane Hammoudi
Keyword(s):  
Web Services ◽  
Web Service ◽  
Business Processes ◽  
Design Solution ◽  
Technical Solution ◽  
Service Oriented Architectures ◽  
Model Driven Development ◽  
Model Driven ◽  
Service Oriented ◽  
Service Behavior

Service-Oriented Architectures (SOA) are widely used by companies to gain flexibility. Web services are the fitted technical solution used to support SOA by providing interoperability and loose coupling. Basic Web services are being assembled to composite Web services in order to directly support business processes. However, there is much to be done to obtain a genuine flawless Web service, and current market implementations do not provide adaptable Web service behavior depending on the service contract. This paper proposes two different approaches to increase adaptability of Web services and SOA. The first approach is based on Aspect Oriented Programming (AOP) as a new design solution for Web services. The authors have implemented an infrastructure to enrich services with aspects and to dynamically reroute messages according to changes, without redeployment. The second approach combines Model Driven Development (MDD) and Context-Awareness to promote reuse and adaptability of Web services behavior depending on the service context. Parameterized transformation techniques are proposed to bind context with business logic implemented by a service. The aim is to merge the two approaches to abstract and reduce the technical complexity of aspect based service solution.

When Parameterized Model Driven Development Supports Aspect Based SOA

2011 ◽  
Vol 7 (3) ◽  
pp. 44-62 ◽  
Author(s):  
Valérie Monfort ◽  
Slimane Hammoudi
Keyword(s):  
Web Services ◽  
Web Service ◽  
Business Processes ◽  
Design Solution ◽  
Technical Solution ◽  
Service Oriented Architectures ◽  
Model Driven Development ◽  
Model Driven ◽  
Service Oriented ◽  
Parameterized Model

Service-Oriented Architectures (SOA) are widely used by companies to gain flexibility. Web services are the fitted technical solution used to support SOA by providing interoperability and loose coupling. Basic Web services are being assembled to composite Web services in order to directly support business processes. However, there is much to be done to obtain a genuine flawless Web service, and current market implementations do not provide adaptable Web service behavior depending on the service contract. This paper proposes two different approaches to increase adaptability of Web services and SOA. The first approach is based on Aspect Oriented Programming (AOP) as a new design solution for Web services. The authors have implemented an infrastructure to enrich services with aspects and to dynamically reroute messages according to changes, without redeployment. The second approach combines Model Driven Development (MDD) and Context-Awareness to promote reuse and adaptability of Web services behavior depending on the service context. Parameterized transformation techniques are proposed to bind context with business logic implemented by a service. The aim is to merge the two approaches to abstract and reduce the technical complexity of aspect based service solution.

Geospatial Web Services

2011 ◽  
pp. 1-35 ◽  
Author(s):  
Peishing Zhao ◽  
Genong Yu ◽  
Liping Di
Keyword(s):  
Life Cycle ◽  
Information Systems ◽  
Web Services ◽  
Web Service ◽  
Service Oriented Architecture ◽  
Spatial Information ◽  
Geospatial Data ◽  
Spatial Information Systems ◽  
Service Oriented ◽  
Geospatial Web Services

As Web service technologies mature in recent years, a growing number of geospatial Web services designed to interoperate spatial information over the network have emerged. Geospatial Web services are changing the way in which spatial information systems and applications are designed, developed and deployed. This chapter introduces all aspects of geospatial Web services from service-oriented architecture to service implementation. It covers the life cycle of geospatial Web services in terms of geospatial interoperable standards, including publish, discovery, invocation and orchestration. To make geospatial Web services more intelligent, semantic issues about geospatial data and services are discussed here. Furthermore, the applications of standard-compliant geospatial Web service are also reviewed.

scholarly journals Penerapan Service Oriented Architecture Menggunakan Web Service Pada Aplikasi Perpustakaan Berbasis Android

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Ari Tunggul Sri Christanto ◽  
Rachel Kurniawati
Keyword(s):  
Information System ◽  
Information Systems ◽  
Web Services ◽  
Web Service ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
Academic Activities ◽  
Library Book ◽  
Service Oriented ◽  
Academic Information

Abstract. Atma Jaya Yogyakarta University Library is one of the supporting units in academic activities. Currently the library has been using information systems to improve services to users and increase the effectiveness of business processes, in terms of dealing with the circulation of books. There are facts that the search of library book collection has not been optimal and there has not been a history facility for borrowing books by the users. Those problems can be solved by the use of Service Oriented Architecture (SOA), which integrates web service on android. The results of this study are android-based applications that implement Service Oriented Architecture (SOA) using web services to integrate the academic information system, library information system and employee information system. So that the exchange of data and information can run more easily and quickly.Keywords: Service Oriented Architecture, Android, Web Service, Book Collection, Library  Abstrak. Perpustakaan Universitas Atma Jaya Yogyakarta adalah salah satu unit pendukung dalam kegiatan akademis. Saat ini perpustakaan telah menggunakan sistem informasi untuk meningkatkan layanan kepada pengguna dan meningkatkan efektifitas proses bisnisnya, termasuk dalam hal menangani masalah sirkulasi buku. Namun terdapat permasalahan yaitu belum optimalnya pencarian koleksi buku perpustakaan dan belum ada fasilitas histori peminjaman buku oleh anggota. Permasalahan tersebut dapat diselesaikan dengan penggunaan Service Oriented Architecture, yaitu mengintegrasikan web service pada android. Hasil dari penelitian ini adalah aplikasi berbasis android yang menerapkan Service Oriented Architecture menggunakan web service untuk mengintegrasikan sistem informasi akademik, sistem informasi perpustakaan dan sistem informasi kepegawaian, sehingga pertukaran data dan informasi dapat semakin mudah dan cepat.Kata Kunci: Service Oriented Architecture, Android, Web Service, Koleksi Buku, Perpustakaan

A Survey of Approaches to Web Service Discovery in Service-Oriented Architectures

2013 ◽  
pp. 107-138
Author(s):  
Marco Crasso ◽  
Alejandro Zunino ◽  
Marcelo Campo
Keyword(s):  
Web Services ◽  
Web Service ◽  
Service Discovery ◽  
Service Oriented Architectures ◽  
Research Directions ◽  
Web Service Discovery ◽  
Functional Aspects ◽  
Service Oriented ◽  
Better Than

Discovering services acquires importance as Service-Oriented Computing (SOC) becomes an adopted paradigm. SOC’s most popular materializations, namely Web Services technologies, have different challenges related to service discovery and, in turn, many approaches have been proposed. As these approaches are different, one solution may be better than another according to certain requirements. In consequence, choosing a service discovery system is a hard task. To alleviate this task, this paper proposes eight criteria, based on the requirements for discovering services within common service-oriented environments, allowing the characterization of discovery systems. These criteria cover functional and non-functional aspects of approaches to service discovery. The results of the characterization of 22 contemporary approaches and potential research directions for the area are also shown.

Exploring Business Value Models for E-Service Design

2011 ◽  
pp. 232-253
Author(s):  
Jelena Zdravkovic ◽  
Tharaka Ilayperuma
Keyword(s):  
Web Services ◽  
Web Service ◽  
Web Applications ◽  
Organizational Structures ◽  
Model Transformations ◽  
Business Services ◽  
Service Oriented Architectures ◽  
Key Factor ◽  
Service Oriented ◽  
Online Business

Contemporary enterprises face strong pressures to increase competitiveness by engaging in alliances of several kinds. In a rapidly increasing degree, traditional organizational structures evolve towards online business using modern ICT – such as the Internet, semantic standards, process- and service-oriented architectures. For efficient applications of inter-organizational information systems, the alignment between business and ICT is a key factor. At the ICT level, Web services are used as the cornerstones for modeling the interaction points of Web applications. So far, development of Web services has focused on a technical perspective, such as the development of standards for message exchanges and service coordination. Thereby, business concepts, such as economic values exchanged among the cooperating actors, cannot be traced in Web service specifications. As a consequence, business and ICT models become difficult to keep aligned. To address this issue, the authors propose a MDA-based approach for design of software services which may be implemented using Web services and Web service coordinations. The proposal focuses on a value-explorative analysis and modeling of business services at the CIM level, and model transformations using UML 2 to the PIM level, by utilizing well-defined mappings.

Web Services and B2B Collaboration

2011 ◽  
pp. 2294-2301
Author(s):  
Susy S. Chan ◽  
Vince Kellen
Keyword(s):  
Web Services ◽  
Web Service ◽  
Value Chain ◽  
Service Management ◽  
Service Oriented Architectures ◽  
Technical Direction ◽  
Computing Paradigm ◽  
Extensible Markup ◽  
Service Oriented ◽  
New Generation

Web service technology is moving into the mainstream. HTTP-based integration is proving more useful than prior approaches for integrating heterogeneous and distributed systems. Web service architectures are quickly advancing beyond and becoming more complex than their initial XML (extensible markup language)/SOAP (simple object access protocol)/UDDI (universal description, discovery, and integration) architectures. With added specifications, Web services are creating a service-oriented computing paradigm with their attendant terms and concepts, such as Web service networks, Web service management platforms, and service-oriented architectures (SOA), among others. Aided by Web services, business-to-business (B2B) integration topologies are growing in diversity to support various options for B2B collaboration. Web services are now the primary technical direction enabling this diversification of B2B collaborations (e-collaboration) among value chain partners and customers. They form the foundation for the development of a new generation of B2B applications and the architecture for integrating enterprise applications (Kreger, 2003). Web services promise to increase these partnering companies’ flexibility, agility, competitiveness, as well as opportunities to reduce development cost and time.

CONTROLLING THE USABILITY OF WEB SERVICES

2009 ◽  
Vol 19 (05) ◽  
pp. 627-651 ◽  
Author(s):  
RON S. KENETT ◽  
AVI HAREL ◽  
FABRIZIO RUGGERI
Keyword(s):  
Decision Support ◽  
User Interface ◽  
Web Services ◽  
Web Service ◽  
Interface Design ◽  
Control Loop ◽  
Statistical Process ◽  
Service Oriented Architectures ◽  
Service Oriented ◽  
Dynamic Integration

Service Oriented Architectures (SOA) enable dynamic integration of Web Services (WS) to accomplish a user's need. As such, they are sensitive to user errors. This article presents a framework for mitigating the risks of user errors due to changes in the service delivery context. The underlying methodology incorporates usability in the design, testing, deployment and operation of dynamic collaborative WS, so that the error-prone elements of the User Interface (UI) are identified and eliminated. The methodology incorporates Statistical Process Control (SPC) of Web Service Indices (WSI), obtained by a Decision Support system for User Interface Design (DSUID), in which the users are elements of the control loop.

Web Services and Service-Oriented Architectures

2008 ◽  
pp. 531-543 ◽  
Author(s):  
Bruce J. Neubauer
Keyword(s):  
Information Systems ◽  
Web Services ◽  
Nonprofit Organizations ◽  
Strategic Alliances ◽  
Local Governments ◽  
Government Agencies ◽  
Informal Networks ◽  
Organizational Boundaries ◽  
Service Oriented Architectures ◽  
Service Oriented

A review of the development of information systems can help in understanding the potential significance of Web services and service-oriented architecture (SOA) in the public sector. SOA involves the convergent design of information systems and organizational workflows at the level of services. The purpose of this chapter is to suggest a strategy for mapping the design of service-oriented architectures onto the complex patterns of governance including combinations of federalism, regionalism, and the outsourcing of functions from government agencies to nonprofit organizations. This involves the modeling of workflows and the identification of opportunities for the sharing of services among agencies and nonprofits. The structures of government agencies reflect political jurisdictions, legislative committee structures, areas of public policy, and geographical locations. Federalism creates situations in which multiple agencies (often at different levels of government) have similar responsibilities in the same geographic areas. Metropolitan areas are complex mosaics of local governments and special districts. In addition, nonprofit organizations are also involved in strategic alliances with government agencies to provide services to citizens. The coordination of efforts among multiple organizations has been one of the major functions of public administrators acting through formal or informal networks of relationships within and across organizational boundaries. Web services and SOA can be used to help integrate the often costly and fragmented delivery of government services.

Web Services and B2B Collaboration

2011 ◽  
pp. 1230-1235
Author(s):  
Susy S. Chan ◽  
Vince Kellen
Keyword(s):  
Web Services ◽  
Web Service ◽  
Value Chain ◽  
Service Management ◽  
Service Oriented Architectures ◽  
Technical Direction ◽  
Computing Paradigm ◽  
Extensible Markup ◽  
Service Oriented ◽  
New Generation

Web service technology is moving into the mainstream. HTTP-based integration is proving more useful than prior approaches for integrating heterogeneous and distributed systems. Web service architectures are quickly advancing beyond and becoming more complex than their initial XML (extensible markup language)/SOAP (simple object access protocol)/UDDI (universal description, discovery, and integration) architectures. With added specifications, Web services are creating a service-oriented computing paradigm with their attendant terms and concepts, such as Web service networks, Web service management platforms, and service-oriented architectures (SOA), among others. Aided by Web services, business-to-business (B2B) integration topologies are growing in diversity to support various options for B2B collaboration. Web services are now the primary technical direction enabling this diversification of B2B collaborations (e-collaboration) among value chain partners and customers. They form the foundation for the development of a new generation of B2B applications and the architecture for integrating enterprise applications (Kreger, 2003). Web services promise to increase these partnering companies’ flexibility, agility, competitiveness, as well as opportunities to reduce development cost and time.

Sign in / Sign up

Export Citation Format

Share Document