DySOA: Making Service Systems Self-adaptive

Siljee, Johanneke; Bosloper, Ivor; Nijhuis, J.A.G.; Hammer, D.K.

doi:10.1007/11596141_20

Cited by 31 publications

(13 citation statements)

References 7 publications

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“…The DySOA project [13] aims at enabling selfadaptive service systems by monitoring their QoS requirements dynamically. The work presented in [12] proposes the use of a rule driven approach for Business Collaborations Development.…”

Section: Related Workmentioning

confidence: 99%

BPEL'n'Aspects: Adapting Service Orchestration Logic

Karastoyanova

Leymann

2009

2009 IEEE International Conference on Web Services

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The need for flexibility in process-based applications, in particular during their execution, places the demand for enabling adaptability of processes. AOP is considered to be one of the approaches to flexibly switch on and off functionality on per-instance basis in applications during their execution; analogously, this paradigm can be applied in a BPEL environment to enable adaptation of running orchestrations. In the presented approach we strive towards reuse of as much concepts and technology already available in a Web service (WS) environment as possible.We combine standard BPEL, the publish/subscribe paradigm and WS-Policy so that WS operations play the role of aspects with respect to BPEL processes. We present the syntax for such aspects as an extension of the WS-Policy framework. We introduce the architecture of the supporting infrastructure and a prototypical implementation. The approach draws on the combined benefits of service orientation and the AOP paradigm to improve the state-of-the-art techniques for flexibility of service orchestrations in a non-intrusive manner.

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Section: Related Workmentioning

confidence: 99%

BPEL'n'Aspects: Adapting Service Orchestration Logic

Karastoyanova

Leymann

2009

2009 IEEE International Conference on Web Services

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“…Other approaches [5,10,23,28] seek to permit automatic composition or automatic reconfiguration of composition of services. This is similar to our approach in that reconfiguration of compositions is central to our approach.…”

Section: Related Workmentioning

confidence: 99%

“…These approaches [5,10,23,27,28] support self-reconfiguration and automated composition in SC systems and allow (automated) rediscovery and rebinding of Web services, but do not allow arbitrary parts of their systems to be variable and do not allow defining several configurations between which can be switched arbitrarily.…”

Section: Introductionmentioning

confidence: 99%

VxBPEL: Supporting variability for Web services in BPEL

Koning

Sun

Sinnema

et al. 2009

Information and Software Technology

103

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Web services provide a way to facilitate the business integration over the Internet. Flexibility is an important and desirable property of Web service-based systems due to dynamic business environments. The flexibility can be provided or addressed by incorporating variability into a system. In this study, we investigate how variability can be incorporated into service-based systems. We propose a language, VxBPEL, which is an adaptation of an existing language, BPEL, and able to capture variability in these systems. We develop a prototype to interpret this language. Finally, we illustrate our method by using it to handle variability of an example.

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“…In the former case fault monitoring is provided by the underlying platform, while in the latter case specific facilities and tools are necessary. In [6] Siljee et al use monitoring to track and collect the information regarding a set of predefined QoS parameters (response time, failure rates, availability) infrastructure characteristics (load, bandwidth) and even context. In [5] Spanoudakis et al use properties in the form of complex behavioral requirements expressed in event calculus.…”

Section: Monitoring For Adaptationmentioning

confidence: 99%

A Framework for Proactive Self-adaptation of Service-Based Applications Based on Online Testing

Hielscher

Kazhamiakin²,

Metzger

et al. 2008

Towards a Service-Based Internet

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Service-based applications have to continuously and dynamically selfadapt in order to timely react to changes in their context, as well as to efficiently accommodate for deviations from their expected functionality or quality of service. Currently, self-adaptation is triggered by monitoring events. Yet, monitoring only observes changes or deviations after they have occurred. Therefore, selfadaptation based on monitoring is reactive and thus often comes too late, e.g., when changes or deviations already have led to undesired consequences. In this paper we present the PROSA framework, which aims to enable proactive selfadaptation. To this end, PROSA exploits online testing techniques to detect changes and deviations before they can lead to undesired consequences. This paper introduces and illustrates the key online testing activities needed to trigger proactive adaptation, and it discusses how those activities can be implemented by utilizing and extending existing testing and adaptation techniques.

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DySOA: Making Service Systems Self-adaptive

Cited by 31 publications

References 7 publications

BPEL'n'Aspects: Adapting Service Orchestration Logic

BPEL'n'Aspects: Adapting Service Orchestration Logic

VxBPEL: Supporting variability for Web services in BPEL

A Framework for Proactive Self-adaptation of Service-Based Applications Based on Online Testing

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