计算机工程 ›› 2008, Vol. 34 ›› Issue (14): 41-43.doi: 10.3969/j.issn.1000-3428.2008.14.015

• 软件技术与数据库 • 上一篇    下一篇

支持QoS约束的组合服务事务恢复算法

李建华,曾慧琼,陈松乔   

  1. (中南大学信息科学与工程学院,长沙 410075)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-07-20 发布日期:2008-07-20

Composite Service Transaction Recovery Algorithm Supporting QoS Constraints

LI Jian-hua, ZENG Hui-qiong, CHEN Song-qiao   

  1. (College of Information Science and Engineering, Central South University, Changsha 410075)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-07-20 Published:2008-07-20

摘要: 在参与者服务发生异常时,如何有效保证组合服务的服务质量(QoS)是一个亟待解决的问题。该文讨论组合服务在执行过程中动态QoS的计算,建立一个组合服务嵌套事务模型,提出一个组合服务事务恢复算法。该算法能将补偿的范围控制在低层的域内,以减少补偿代价,保证QoS接近最优,同时保证组合服务事务的语义原子性。

关键词: Web服务, 组合服务, 事务, 服务质量

Abstract: It is an urgent problem that how to insure QoS of composite service effectively when exception happens in participant service. This paper discusses the dynamic calculation of QoS when composite service is running, builds an embedded transaction model of composite service and presents a transaction recovery algorithm of composite service. The algorithm can keep the area of compensation in a lower scope, reduce the cost of compensation, and insure QoS approach to the best when transaction recovering and relaxed atomic of transaction-semantic atomic.

Key words: Web service, composite service, transaction, QoS

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