PAWS: A Framework for Executing Adaptive Web-Service Processes

Ardagna, Danilo; Comuzzi, Marco; Mussi, E.; Pernici, Barbara; Plebani, Pierluigi

doi:10.1109/ms.2007.174

Cited by 130 publications

(90 citation statements)

References 14 publications

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“…Figure 1 exemplifies these types of adaptation. This adaptation model is in line with related work, as other approaches to self-adapting compositions usually assume similar possibilities for adaptation [8,9]. The excerpt in Figure 1 is a small part of an assembling case study presented in [4].…”

Section: Stepwise Service Composition Optimizationsupporting

confidence: 78%

Stepwise and Asynchronous Runtime Optimization of Web Service Compositions

Leitner

Hummer

Satzger

et al. 2011

Lecture Notes in Computer Science

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Abstract. Existing research work considers runtime adaptation of service compositions as a viable tool to prevent violations of service level agreements. In previous work we have formalized the optimization problem of identifying the most suitable adaptations to prevent a predicted set of violations, and presented suitable algorithms to solve this problem. Here, we introduce the idea of stepwise optimization as a solution to the problem of how to deal with situations when the optimization result is not available in time, i.e., when decisions need to be taken before the optimization problem can be fully solved.

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Section: Stepwise Service Composition Optimizationsupporting

confidence: 78%

Stepwise and Asynchronous Runtime Optimization of Web Service Compositions

Leitner

Hummer

Satzger

et al. 2011

Lecture Notes in Computer Science

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“…Therefore, our system essen-tially implements the paradigm of self-adapting service compositions. This is related to the area of flexible service composition, as introduced in [34]. Flexible service compositions reoptimize their composition at runtime, in order to deal with unanticipated problems.…”

Section: Related Workmentioning

confidence: 99%

Cost-Based Optimization of Service Compositions

Leitner

Hummer

Dustdar

2013

IEEE Trans. Serv. Comput.

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For providers of composite services preventing cases of SLA violations is crucial. Previous work has established runtime adaptation of compositions as a promising tool to achieve SLA conformance. However, in order to get a realistic and complete view of the decision process of service providers, the costs of adaptation need to be taken into account. In this paper we formalize the problem of finding the optimal set of adaptations, which minimizes the total costs arising from SLA violations and the adaptations to prevent them. We present possible algorithms to solve this complex optimization problem, and detail an end-to-end system based on our earlier work on the PREvent (prediction and prevention based on event monitoring) framework, which clearly indicates the usefulness of our model. We discuss experimental results that show how the application of our approach leads to reduced costs for the service provider, and explain the circumstances in which different algorithms lead to more or less satisfactory results. Abstract-For providers of composite services preventing cases of SLA violations is crucial. Previous work has established runtime adaptation of compositions as a promising tool to achieve SLA conformance. However, in order to get a realistic and complete view of the decision process of service providers, the costs of adaptation need to be taken into account. In this paper we formalize the problem of finding the optimal set of adaptations, which minimizes the total costs arising from SLA violations and the adaptations to prevent them. We present possible algorithms to solve this complex optimization problem, and detail an end-to-end system based on our earlier work on the PREvent (prediction and prevention based on event monitoring) framework, which clearly indicates the usefulness of our model. We discuss experimental results that show how the application of our approach leads to reduced costs for the service provider, and explain the circumstances in which different algorithms lead to more or less satisfactory results.

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“…The TWSO framework (Hrastnik and Winiwarter, 2005) addresses process transactions. The PAWS framework (Ardagna et al, 2007) extends the ActiveBPEL engine to provide a flexible process that can change its behaviour dynamically, according to variable execution contexts. Similar frameworks (Mosincat and Binder, 2008), (Erradi et al, 2006) also extend the BPEL engine for process adaptation, but without an awareness of multitenancy.…”

Section: Related Workmentioning

confidence: 99%

A Coordination Protocol for User-customisable Cloud Policy Monitoring

Wang

Pahl

2013

Proceedings of the 3rd International Conference on Cloud Computing and Services Science

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Abstract:Cloud computing will see a increasing demand for end-user customisation and personalisation of multi-tenant cloud service offerings. Combined with an identified need to address QoS and governance aspects in cloud computing, a need to provide user-customised QoS and governance policy management and monitoring as part of an SLA management infrastructure for clouds arises. We propose a user-customisable policy definition solution that can be enforced in multi-tenant cloud offerings through an automated instrumentation and monitoring technique. We in particular allow service processes that are run by cloud and SaaS providers to be made policy-aware in a transparent way.

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PAWS: A Framework for Executing Adaptive Web-Service Processes

Cited by 130 publications

References 14 publications

Stepwise and Asynchronous Runtime Optimization of Web Service Compositions

Stepwise and Asynchronous Runtime Optimization of Web Service Compositions

Cost-Based Optimization of Service Compositions

A Coordination Protocol for User-customisable Cloud Policy Monitoring

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