基于适配的服务协作流程动态管理

A Dynamic Management Approach to Mediation-Based Service Collaboration Process

服务协作以服务为构造单元,通过组合不同的服务,实现复杂的业务逻辑,并以此为基础构建新的应用.为实现正确的服务协作,服务之间的交互必须是兼容且一致的.适配技术通过构造适配器来弥补服务之间的交互差异,为解决协作的一致性问题提供了有效的方法途径.然而考虑到服务计算环境的动态特性,协作适配器本身应具有动态调整及重新配置的能力,从而避免使其成为协作系统响应动态变化的可适应能力的瓶颈.文中首先给出了一种基于适配的服务协作方法,以保证服务交互的一致性.并针对提出的适配器结构,建立了适配器的执行模型,在此基础上给出了适配器的动态更新方法,使适配器具有可重配置以及动态调整的能力,从而保证了基于适配的服务协作系统的灵活性和动态可适应性.

Service collaboration realizes complex business logic based on Web services and through which to construct applications. It is necessary of compatibility and consistency between interactive services for correct service collaboration. Mediation technologies provide effective approaches for bridging service differences. Considering the dynamic nature of service-oriented computing, mediation itself should be equipped with dynamic adaptation and re-configuration capabilities to avoid the bottle-neck of the dynamic management of collaboration system. This paper proposes a mediation-based approach to facilitate service collaboration when mismatches occur between interactive services. The execution model and the adaptation method for mediators are also presented to realize the re-configuration and dynamic adjustment of mediators at runtime, which ensures the agility and adaptability of service collaboration based on mediation mechanism.