一个面向服务的DCPS信息库的设计与实现

DDS是对象管理组织（OMG）针对实时数据分发系统制定的一个规范。DCPS信息库节点是DDS系统的核心服务节点，保存了系统内所有节点的状态信息。从面向服务的角度，提出了一个DCPS信息库的设计方案，定义了一个全局数据空间，并通过对全局数据空间的维护实现了分布式系统空间解耦合、动态扩展的特性。基于DCPS信息库搭建了一个发布订阅系统，分析了系统运行的实时性。结果表明，设计方案可以保证节点间高效、快速的进行数据分发。

Design and Implementation of a Service- oriented DCPS Information Database

Data Distribution Service （DDS）, published by OMG, is a specification on data distribution service for real- time systems. The core of the DDS system is DCPS information database node, which saves all the nodes in the system status information. This article, based on the research of DDS specifica- tion, uses the method of service oriented design and implements a DCPS information database, defines a global data space, which has implemented the space coupling, dynamic joining and exit features. Based on DCPS information database, The article has builds a publish- subscribe system, and analyzes real- time performance, the result shows that this design can ensure efficient and fast data distribution between the nodes.