基于CORBA的分布实时事件管理技术研究

ON TECHNOLOGY RESEARCH OF CORBA-BASED DISTRIBUTED REAL-TIME EVENT MANAGEMENT

基于事件的通信是许多分布系统进行异步交互的重要途径 .传统的分布事件管理机制既无法解决分布应用的异构性、复杂性和集成性 ,又无法充分支持实时环境 .分布对象计算的主流技术 CORBA是解决前一个难题的最佳手段 ,但标准的 CORBA事件服务又缺乏对实时应用的支持 .为此 ,本文研究了事件通信在分布实时环境中呈现出的新特性 ,分析了 CORBA事件服务的不足 ,提出了基于 CORBA的分布实时事件管理技术 .通过实时化标准的 CORBA事件服务 ,设计实现了 DREAMS系统 ,为 CORBA在实时领域的应用推广作出了有意义的尝试 .

Many distributed applications exchange asynchronous requests using event based execution model. Unfortunately, the traditional mechanisms of distributed event management could neither solve problems of the heterogeneity, complexity and integration of distributed applications, nor support the real time environments. The CORBA Event Service provides a flexible model for asynchronous and group communication among distributed objects. However, its specification lacks important features to support the real time applications. This paper describes new features of the event communication in the real time environments and analyses shortages of the standard CORBA Event Service Specification, then proposes the CORBA based distributed real time event management mechanism. This paper illustrates how to real timize the CORBA Event Service and designs the Distributed Real time Event Adaptive Management System which proves the correctness and feasibility of the proposed mechanism. The achievements of this paper are very helpful and useful to improve the CORBA applications in the real time domain.