一种面向服务流程异常处理的策略描述语言

Policy Description Language for Exception Handling in Service-oriented Processes

策略描述语言是策略驱动的面向服务流程异常处理方法的基础和前提。针对目前已有策略语言在描述面向服务流程异常处理逻辑方面的不足,提出了一种新的面向服务流程异常处理的策略描述语言WS-Policy4BPEH。它在Web服务策略框架的基础上,扩展了ECA对规则执行影响的描述,定义了多种面向服务流程的异常处理动作模式,能够详细、准确地描述异常及异常处理方式、返回方式和传播方式。WS-Policy4BPEH采用XML作为元语言,因此具有良好的可扩展性。

The policy description languages is the basis and premise of policy-driven exception handling for service-oriented processes.Aiming at the lack of existing policy languages representing capacity for exception handling,this paper presented WS-Policy4BPEH,a new policy description language for exception handling in service-oriented processes.This language,based on the Web services policy framework,extends the specifications of effects in ECA rules and defines a variety of action patterns supporting exception handling,which can describe in detail the exception and exception handling,and flexibly specifies the return modes and the exception propagation after exception handling.The paper adopted XML as a meta-language for specifying WS-Policy4BPEH,with a good scalability.