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The Research on Fault-Tolerant Method of Web Services Composition

Author: TangYuan
Tutor: JinKeYin
School: Hunan University
Course: Applied Computer Technology
Keywords: Web Services Web service composition Fault-tolerant Credible Adaptive
CLC: TP393.09
Type: Master's thesis
Year: 2009
Downloads: 36
Quote: 3
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Abstract


Web services technology as one of important technologies for distributed applications in the field of e-commerce , business process management has a broad application prospects . At present , the credibility of Web services is an important research aspect of Web Services Research . Fault-tolerant processing as improve service credibility of the core technology , is the basis of the distributed computing research . The main work of this paper is to focus on Web services fault-tolerant technology research expanded . The main contents are as follows : First , this paper proposes a new service failure classification . Service in accordance with the severity of the service failure in which the execution of steps and failures , failure classification , grading, on different categories , different levels of failure to take a different fault - tolerant algorithm . Secondly, according to the characteristics of Web services , a fault-tolerant processing framework to ensure the normal execution of composite Web services . Under this framework , the combination of services in the event of failure recovery time adaptive , in order to ensure the normal operation of the composite service , so that the service framework with fault-tolerant capabilities . Used in the framework of a doubly linked list to describe the relationship between the various tasks of the composite service . The data model used to describe the relationship between the various tasks and tasks in the composite service . Fault-tolerant Web service composition , it can provide a good method of calculating and flexible back , but also to achieve the combination of services at runtime can recall the key points . In this paper, active and passive two methods combined to obtain the failure information . For different levels and in different types of processes , the failure of the class design of a variety of algorithms in order to ensure the completion of the overall process execution of the Web service composition . Finally, the validity of the simulation validation framework and the algorithm in the JADE platform .

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