CORBA 3.0新特性分析

Study on New Features for CORBA 3. 0

1 CORBA3.0框架 OMG的CORBA标准作为分布对象处理的规范已有若干年了。随着分布系统的开发应用,原有规范也暴露出不足之处,同时为了适应越来越复杂的分布式应用程序,需要对规范作补充和改善以增加灵活性和适用性,满足不断增长的应用程序的要求。到1998年底,OMG已相继确定了Portability 2.3Rev、OBV 2.3 Rev等一系列推荐模型,基本上确定了CORBA3.0规范的整体框架。在3.0规范的先期版本Pre-Release中,新增了几个典型的特性,主要有支持可移植对象适配器(POA)、分布式组件模型(CORBAComponent Model)与脚本语言、以值传对象(OBV)、服务质量控制(QoS)、异步消息传输协议支持以及和因特网技术的整合(Java/Internet)等。新版本增加这些技术功能的主要目的是要提高CORBA的适用性,扩大规范的应用范围,并改善对网络需求的适应性。按Dr.Soley所言,3.0版本的COR-

As infrastructure of Distributed Object Computing,CORBA Specification is now used more and more widely. With development of distributed applications and other technologies,new specification is adopted to improve the performance and make it more easy-to-use. The Component Model ,Portable Object Adapter and Asynchronous Messaging etc. ,which were waited for a long time,are committed in the new version. The detail will be examined to show how these technologies work and add new features to CORBA 3. 0 Specification.