Adaptation inWeb Service Composition and Execution

Chafle, Girish; Dasgupta, Koustuv; Kumar, Arun; Mittal, Sumit; Srivastava, Biplav

doi:10.1109/icws.2006.22

Cited by 61 publications

(43 citation statements)

References 12 publications

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“…The other solutions [12,9,10,15,8,46] propose adaptations in the definition of a CWS. It is done at two levels: the goal of the first level is to improve availability or performance of a CWS, and at the second level to respond to changes in business requirements.…”

Section: Discussionmentioning

confidence: 99%

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Model Aware Execution of Composite Web Services

Zurowska

Deters

2009

2009 IEEE International Conference on Services Computing

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In the Service Oriented Architecture (SOA) services are computational elements that are published, discovered, consumed and aggregated across platform and organizational borders. The most commonly used technology to achieve SOA are Web Services (WSs). This is due to standardization process (WSDL, SOAP, UDDI standards) and a wide range of available infrastructure and tools. A very interesting aspect of WSs is their composeability. WSs can be easily aggregated into complex workflows, called Composite Web Services (CWSs). These compositions of services enable further reuse and in this way new, even more complex, systems are built.Although there are many languages to specify or implement workflows, in the service-oriented systems BPEL (Business Process Execution Language) is widely accepted. With this language WSs are orchestrated and then executed with specialized engines (like ActiveBPEL). While being very popular, BPEL has certain limitations in monitoring and optimizing executions of CWSs. It is very hard with this language to adapt CWSs to changes in the performance of used WSs, and also to select the optimal way to execute a CWS.To overcome the limitations of BPEL, I present a model-aware approach to execute CWSs. To achieve the model awareness the Coloured Petri Nets (CPN) formalism is considered as the basis of the execution of CWSs. This is different than other works in using formal methods in CWSs, which are restricted to purposes like verification or checking of correctness. Here the formal and unambiguous notation of the CPN is used to model, analyze, execute and monitor CWSs. Furthermore this approach to execute CWSs, which is based on the CPN formalism, is implemented in the model-aware middleware. It is also demonstrated how the middleware improves the performance and reliability of CWSs.ii

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Section: Discussionmentioning

confidence: 99%

“…A more comprehensive proposition to the dynamic choice of a process is presented by Chafle et al [9]. In this work there are two stages of composition, which refer to functional and nonfunctional requirements of the desired CWS.…”

Section: Input Specmentioning

confidence: 99%

Model Aware Execution of Composite Web Services

Zurowska

Deters

2009

2009 IEEE International Conference on Services Computing

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“…[2,22,6]) suggest supporting the composite application with pre-computed backup services to ensure its continuous execution without any extra 150 delay in the face of component failures. However, the problem with such approaches is that, due to the dynamic nature of services, the backups produced during selection may no longer remain optimal, satisfactory, or even available during execution.…”

Section: Related Workmentioning

confidence: 99%

Adaptive composition in dynamic service environments

Barakat

Miles

Lück

2018

Future Generation Computer Systems

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Due to distribution, participant autonomy and lack of local control, service-based systems operate in highly dynamic and uncertain environments. In the face of such dynamism and volatility, the ability to manage service changes and exceptions during composite service execution is a vital requirement. Most current adaptive composition approaches, however, fail to address service changes without causing undesirable disruptions in execution or considerably degrading the quality of the composite application. In response, this paper presents a novel adaptive execution approach, which efficiently handles service changes occurring at execution time, for both repair and optimisation purposes. The adaptation is performed as soon as possible and in parallel with the execution process, thus reducing interruption time, increasing the chance of a successful recovery, and producing the most optimal solution according to the current environment state. The effectiveness of the proposed approach is demonstrated both analytically and empirically through a case study evaluation applied in the framework of learning object composition.

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“…RELATED WORK Research in [8], [10], [11] discusses how to replan or rebind in service selection problem when some services are different from the declared QoS or become invalid. Mixed integer programming approach [8], region-based service reconfiguration approach [9], IP approach [10] and Markov decision process solution [11] have been proposed. The work in [12] first selects multiple services for every abstract service class of a complex process template by a heuristic algorithm, which aims at determining a set of near-optimal service compositions.…”

Section: F Special Casementioning

confidence: 99%

“…Thus, n-m replacement is usually needed besides the simple 1-1 replacement [7]. Although adaptive service selection for dynamic services is discussed in [8], [9], [10], [11], [12], few work has done on dynamic QoS-aware automatic service composition problem. Thus, we propose a novel event driven continuous query mechanism for it.…”

Section: Introductionmentioning

confidence: 99%

Continuous Query for QoS-Aware Automatic Service Composition

Jiang

Lee

et al. 2012

2012 IEEE 19th International Conference on Web Services

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Abstract-Current QoS-aware automatic service composition queries over a network of Web services are often one-time in nature. After a network of Web services is built, such queries are issued once, and answers are found from the scratch. The underlying assumption is that the participating Web services are rather static so that their functional and non-functional parameters seldom change. However, such an assumption is often baseless. New services come and go, service APIs change gradually, and QoS values fluctuate. Therefore, a support for efficiently handling "continuous" service composition queries is desired. In this paper, we propose an event driven continuous query algorithm for QoS-aware automatic service composition problem to cope with different types of dynamic services. Moreover, we integrated this algorithm in our service composition system, QSynth. Finally, we evaluate our proposal using both real QoS data and synthetic Web service data and show the superior performance of ours, compared to the state-of-theart solution which won the performance championship of Web Service Challenge in 2009 and 2010.

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Adaptation inWeb Service Composition and Execution

Cited by 61 publications

References 12 publications

Model Aware Execution of Composite Web Services

Model Aware Execution of Composite Web Services

Adaptive composition in dynamic service environments

Continuous Query for QoS-Aware Automatic Service Composition

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