可移植对象适配器策略机制的分析与设计

Analysis and Design of a Policy Mechanism for Portable Object Adapters

可移植对象适配器POA模型是CORBA规范中一个核心模型,它是CORBA为了规范服务器应用程序的开发以及解决服务器程序在不同ORB产品之间无需修改地进行移植问题而提出的,POA策略是其关键特性。本文对POA模型中的七个标准策略的特点、应用场合以及各种策略组合进行了深入的分析,在此基础上设计实现了POA策略机制,提供了灵活的策略创建、策略管理手段,使得应用开发者可以根据需要灵活地对POA进行动态配置,从而满足了不同应用的需求。

The POA model is presented by CORBA for specifying the development of server applications and solving the problem of the server applications between different ORB products without modifications, and POA policy is its key property. This paper deeply analyses the properties, application conditions and varied policy combinations of seven POA standard policies. Based on the analysis, we design and implement a POA policy mechanism, provide the way of flexible policy creation and policy management, make the application developers flexibly and dynamically configure POA according to the requirements, and thus satisfy the requirements of different applications.