An Evaluation Of Service Frameworks For The Management Of Service Ecosystems

A service ecosystem is a marketplace for trading services in which services are developed, published, sold and used. Service ecosystems have changed the way of service delivery and service consumption among actors/parties, who perform specific roles for the operation of the ecosystems. Such actors, being service providers, consumers, mediators and intermediaries, ensure the livelihood of the ecosystem. However, the role of the service infrastructure provider, one of the actors of the service ecosystem, is still not being explored sufficiently. The service infrastructure provider provides service infrastructures/frameworks upon which other actors of the service ecosystem operate. In this paper, an evaluation framework for the service framework is defined, which is based on the features that are required for a service ecosystem to thrive. The evaluation framework is used to evaluate three opensource service frameworks. The evaluation framework facilities the selection process of a service framework among the largely available ones

A theory and model for the evolution of software services

Software services are subject to constant change and variation. To control service development, a service developer needs to know why a change was made, what are its implications and whether the change is complete. Typically, service clients do not perceive the upgraded service immediately. As a consequence, service-based applications may fail on the service client side due to changes carried out during a provider service upgrade. In order to manage changes in a meaningful and effective manner service clients must therefore be considered when service changes are introduced at the service provider's side. Otherwise such changes will most certainly result in severe application disruption. Eliminating spurious results and inconsistencies that may occur due to uncontrolled changes is therefore a necessary condition for the ability of services to evolve gracefully, ensure service stability, and handle variability in their behavior. Towards this goal, this work presents a model and a theoretical framework for the compatible evolution of services based on well-founded theories and techniques from a number of disparate fields.

Towards Connecting Online Interfacing and Internal Core Business Processes

Nowadays, organisations tend to do more business online by enabling their business processes to interact with customers, suppliers, etc., via different online channels. On the other hand, their core business processes, such as production, engineering, etc., may still stay inside the organisation. As a consequence, this makes an organisation rely on the collaboration between these two types of business processes to conduct its business, and this collaboration brings issues like multiple instance correlation, process view, and process evolution, to the business process management (BPM) of the organisation. This paper reports our research in progress on these issues. It firstly identifies the requirements to fully support such collaboration, and then presents a framework to illustrate how the collaboration can be facilitated using latest BPM technologies. This framework provides a reference architecture to incorporating online interfacing and internal core business processes

Web service composition: A survey of techniques and tools

Web services are a consolidated reality of the modern Web with tremendous, increasing impact on everyday computing tasks. They turned the Web into the largest, most accepted, and most vivid distributed computing platform ever. Yet, the use and integration of Web services into composite services or applications, which is a highly sensible and conceptually non-trivial task, is still not unleashing its full magnitude of power. A consolidated analysis framework that advances the fundamental understanding of Web service composition building blocks in terms of concepts, models, languages, productivity support techniques, and tools is required. This framework is necessary to enable effective exploration, understanding, assessing, comparing, and selecting service composition models, languages, techniques, platforms, and tools. This article establishes such a framework and reviews the state of the art in service composition from an unprecedented, holistic perspective

A theory and model for the evolution of software services.

Software services are subject to constant change and variation. To control service development, a service developer needs to know why a change was made, what are its implications and whether the change is complete. Typically, service clients do not perceive the upgraded service immediately. As a consequence, service-based applications may fail on the service client side due to changes carried out during a provider service upgrade. In order to manage changes in a meaningful and effective manner service clients must therefore be considered when service changes are introduced at the service provider's side. Otherwise such changes will most certainly result in severe application disruption. Eliminating spurious results and inconsistencies that may occur due to uncontrolled changes is therefore a necessary condition for the ability of services to evolve gracefully, ensure service stability, and handle variability in their behavior. Towards this goal, this work presents a model and a theoretical framework for the compatible evolution of services based on well-founded theories and techniques from a number of disparate fields.

Implementation of Distributed Transactions in BPEL

Cílem této bakalářské práce je implementovat podporu distribuovaných transakcí do projektu RiftSaw tak, aby webové služby mohly být volány v rámci distribuovaných transakcí podnikovými procesy. A to pouze v tom případě, že operace webové služby vyžaduje být provedena v rámci distribuované transakce. Oproti již funkčním implementacím přináší podporu specifikace WS-BusinessActivity a jiný způsob kontroly, zda má podnikový proces použít distribuované transakce u volaných webových služeb.The goal of this work is to implement a support of distributed transactions into the project RiftSaw so that web services can be invoked within distributed transactions by business processes. And only if a web service operation requires to be performed within a distributed transaction. Comparing to already working implementations, the presented sulution brings support of WS-BusinessActivity specification and a different way of checking that a business process use distributed transactions for invoked web services.