scholarly journals Selective Service Provenance in the VRESCo Runtime

2012 ◽  
pp. 372-394
Author(s):  
Anton Michlmayr ◽  
Florian Rosenberg ◽  
Philipp Leitner ◽  
Schahram Dustdar
Keyword(s):  
Performance Evaluation ◽  
Information Systems ◽  
Web Service ◽  
Scientific Workflows ◽  
Data Provenance ◽  
Provenance Information ◽  
Selective Service ◽  
Runtime Environment ◽  
Service Oriented ◽  
History Of

In general, provenance describes the origin and well-documented history of a given object. This notion has been applied in information systems, mainly to provide data provenance of scientific workflows. Similar to this, provenance in Service-oriented Computing has also focused on data provenance. However, the authors argue that in service-centric systems the origin and history of services is equally important. This paper presents an approach that addresses service provenance. The authors show how service provenance information can be collected and retrieved, and how security mechanisms guarantee integrity and access to this information, while also providing user-specific views on provenance. Finally, the paper gives a performance evaluation of the authors’ approach, which has been integrated into the VRESCo Web service runtime environment.

scholarly journals Selective Service Provenance in the VRESCo Runtime

2010 ◽  
Vol 7 (2) ◽  
pp. 65-86 ◽  
Author(s):  
Anton Michlmayr ◽  
Florian Rosenberg ◽  
Philipp Leitner ◽  
Schahram Dustdar
Keyword(s):  
Performance Evaluation ◽  
Information Systems ◽  
Web Service ◽  
Scientific Workflows ◽  
Data Provenance ◽  
Provenance Information ◽  
Selective Service ◽  
Runtime Environment ◽  
Service Oriented ◽  
History Of

In general, provenance describes the origin and well-documented history of a given object. This notion has been applied in information systems, mainly to provide data provenance of scientific workflows. Similar to this, provenance in Service-oriented Computing has also focused on data provenance. However, the authors argue that in service-centric systems the origin and history of services is equally important. This paper presents an approach that addresses service provenance. The authors show how service provenance information can be collected and retrieved, and how security mechanisms guarantee integrity and access to this information, while also providing user-specific views on provenance. Finally, the paper gives a performance evaluation of the authors’ approach, which has been integrated into the VRESCo Web service runtime environment.

Event Processing in Web Service Runtime Environments

2010 ◽  
pp. 284-306 ◽  
Author(s):  
Anton Michlmayr ◽  
Philipp Leitner ◽  
Florian Rosenberg ◽  
Schahram Dustdar
Keyword(s):  
Web Service ◽  
Service Discovery ◽  
Historical Event ◽  
Event Processing ◽  
Service Oriented Architectures ◽  
Loosely Coupled ◽  
Service Invocation ◽  
Runtime Environment ◽  
Service Oriented ◽  
Runtime Environments

Service-oriented Architectures (SOA) and Web services have received a lot of attention from both industry and academia. Services as the core entities of every SOA are changing regularly based on various reasons. This poses a clear problem in distributed environments since service providers and consumers are generally loosely coupled. Using the publish/subscribe style of communication service consumers can be notified when such changes occur. In this chapter, we present an approach that leverages event processing mechanisms for Web service runtime environments based on a rich event model and different event visibilities. Our approach covers the full service lifecycle, including runtime information concerning service discovery and service invocation, as well as Quality of Service attributes. Furthermore, besides subscribing to events of interest, users can also search in historical event data. We show how this event notification support was integrated into our service runtime environment VRESCo and give some usage examples in an application context.

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

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.

Flexible Provenance Tracing

2013 ◽  
pp. 157-175
Author(s):  
Liwei Wang ◽  
Henning Koehler ◽  
Ke Deng ◽  
Xiaofang Zhou ◽  
Shazia Sadiq
Keyword(s):  
Inversion Method ◽  
Data Provenance ◽  
Time Requirement ◽  
Provenance Information ◽  
Inversion Methods ◽  
Provenance Data ◽  
Source Data ◽  
History Of ◽  
And Inversion ◽  
Derivation Process

The description of the origins of a piece of data and the transformations by which it arrived in a database is termed the data provenance. The importance of data provenance has already been widely recognized in database community. The two major approaches to representing provenance information use annotations and inversion. While annotation is metadata pre-computed to include the derivation history of a data product, the inversion method finds the source data based on the situation that some derivation process can be inverted. Annotations are flexible to represent diverse provenance metadata but the complete provenance data may outsize data itself. Inversion method is concise by using a single inverse query or function but the provenance needs to be computed on-the-fly. This paper proposes a new provenance representation which is a hybrid of annotation and inversion methods in order to achieve combined advantage. This representation is adaptive to the storage constraint and the response time requirement of provenance inversion on-the-fly.

scholarly journals Consistency and Modularity in Mediated Service-Based Data Integration Solutions

2010 ◽  
pp. 98-113
Author(s):  
Yaoling Zhu ◽  
Claus Pahl
Keyword(s):  
Information Systems ◽  
Data Integration ◽  
Web Service ◽  
Data Transformation ◽  
Data Representation ◽  
Data Models ◽  
Information System Architecture ◽  
Semantic Data ◽  
Service Oriented ◽  
High Degree

A major aim of the Web service platform is the integration of existing software and information systems. Data integration is a central aspect in this context. Traditional techniques for information and data transformation are, however, not sufficient to provide flexible and automatable data integration solutions for Web service-enabled information systems. The difficulties arise from a high degree of complexity in data structures in many applications and from the additional problem of heterogeneity of data representation in applications that often cross organisational boundaries. The authors present an integration technique that embeds a declarative data transformation technique based on semantic data models as a mediator service into a Web service-oriented information system architecture. Automation through consistency-oriented semantic data models and flexibility through modular declarative data transformations are the key enablers of the approach.

scholarly journals Consistency and Modularity in Mediated Service-Based Data Integration Solutions

2011 ◽  
pp. 997-1012
Author(s):  
Yaoling Zhu ◽  
Claus Pahl
Keyword(s):  
Information Systems ◽  
Data Integration ◽  
Web Service ◽  
Data Transformation ◽  
Data Representation ◽  
Data Models ◽  
Information System Architecture ◽  
Semantic Data ◽  
Service Oriented ◽  
High Degree

A major aim of the Web service platform is the integration of existing software and information systems. Data integration is a central aspect in this context. Traditional techniques for information and data transformation are, however, not sufficient to provide flexible and automatable data integration solutions for Web service-enabled information systems. The difficulties arise from a high degree of complexity in data structures in many applications and from the additional problem of heterogeneity of data representation in applications that often cross organisational boundaries. The authors present an integration technique that embeds a declarative data transformation technique based on semantic data models as a mediator service into a Web service-oriented information system architecture. Automation through consistency-oriented semantic data models and flexibility through modular declarative data transformations are the key enablers of the approach.

Semantic Enrichment of Web Service Architecture

2010 ◽  
pp. 303-321
Author(s):  
Aicha Boubekeur ◽  
Mimoun Malki ◽  
Abdellah Chouarfia ◽  
Mostefa Belarbi
Keyword(s):  
Information System ◽  
Information Systems ◽  
Web Services ◽  
Data Integration ◽  
Web Service ◽  
Service Oriented Architecture ◽  
Operating Mode ◽  
Semantic Web Services ◽  
Service Architecture ◽  
Service Oriented

The SOA: Service Oriented Architecture is a paradigm which allows the unification in the approaches of integration of the information systems. This data integration of shared semantic description of handled by the services. This integration of the data is more flexible considering the limited number of the concepts used by the services. Therefore, architecture is suggested in order to reduce domain ontologies development and integration complexity. It allows also finding and automatic invocation of the services. Ontologies are integrated without doing major changes in operating mode of web services like HTTP, SOAP. This chapter presents an architecture which is a step towards its automation through the semantic web services without redefining the information system completely.

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