基于BPEL和WS-TX的Web服务组合事务协调框架研究

Research of Web Services Composition Transaction Coordination Framework Based on BPEL and WS-TX

针对当前Web服务事务协调框架中缺乏对服务组合流程定义的支持而需要在协调过程中手动定义业务流程的问题,提出了一种支持流程和事务语义自动抽取的服务组合事务协调框架。该框架从扩展了事务语义的业务流程执行语言(Business Process Execution Language,BPEL)中抽取协调信息,并结合Web服务事务规范(Web Services Transaction,WS-TX)所定义的协调器实现了服务组合的全局事务协调。通过将WS-TX在事务协调和BPEL在业务流程设计方面的优势相结合,该框架将业务逻辑与事务处理逻辑有效地分离。最后通过实例分析说明了该框架的可行性。

As composite service process must be manually defined when using Web service transaction coordination framework because of lack of process definition support,a transaction coordination framework which supports process and transaction semantic information automatic extracting was proposed.It coordinates the composite service by using transaction coordinator defined by Web services transaction（WS-TX） and extracting coordination information from extended business process execution language（BPEL）.The proposed framework combines the advantages of both WS-TX in the transaction coordination and BPEL in business process design to separate transaction logic from business logic effectively.Finally the effectiveness of the framework was validated through a case study.