QoS aggregation for Web service composition using workflow patterns

Proceedings. Eighth IEEE International Enterprise Distributed Object Computing Conference, 2004. EDOC 2004. Pub Date : 2004-09-20 DOI:10.1109/EDOC.2004.10027

M. Jäger, Gregor Rojec-Goldmann, Gero Mühl

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引用次数: 451

Abstract

Contributions in the field of Web services have identified that (a) finding matches between semantic descriptions of advertised and requested services and (b) nonfunctional characteristics - the quality of service (QoS) - are the most crucial criteria for composition of Web services. A mechanism is introduced that determines the QoS of a Web service composition by aggregating the QoS dimensions of the individual services. This allows to verify whether a set of services selected for composition satisfies the QoS requirements for the whole composition. The aggregation performed builds upon abstract composition patterns, which represent basic structural elements of a composition, like sequence, loop, or parallel execution. This work focusses on workflow management environments. We define composition patterns that are derived from Van der Aalst's et al. comprehensive collection of workflow patterns. The resulting aggregation schema supports the same structural elements as found in workflows. Furthermore, the aggregation of several QoS dimensions is discussed.

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使用工作流模式进行Web服务组合的QoS聚合

Web服务领域的贡献已经确定了(a)找到发布的和请求的服务的语义描述之间的匹配，以及(b)非功能特征——服务质量(QoS)——是组合Web服务的最关键标准。引入了一种机制，该机制通过聚合单个服务的QoS维度来确定Web服务组合的QoS。这允许验证为组合选择的一组服务是否满足整个组合的QoS需求。所执行的聚合建立在抽象组合模式之上，抽象组合模式表示组合的基本结构元素，如序列、循环或并行执行。这项工作的重点是工作流管理环境。我们定义了来自Van der Aalst等人的工作流模式综合集合的组合模式。生成的聚合模式支持与工作流中发现的相同的结构元素。此外，还讨论了多个QoS维度的聚合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings. Eighth IEEE International Enterprise Distributed Object Computing Conference, 2004. EDOC 2004.

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