基于主动数据库的移动P2P查询处理  

Query processing in mobile P2P system based on active database

作　　者：胡国玲[1] 

机构地区：[1]华东理工大学信息科学与工程学院,上海200237

出　　处：《计算机应用》2007年第5期1089-1091,1134,共4页journal of Computer Applications

摘　　要：提出了一个基于主动数据库的移动代理构造及管理系统模型。它采用主动数据库中的事件—条件—活动(ECA)规则来定义代理的逻辑结构并利用其触发器机制来实施代理的执行和管理,不仅大大简化了支持即时或连续查询的P2P系统的体系结构而且通过主动数据库的安全机制能确保从自治数据库中获取信息的安全性和有效性。给出了移动P2P系统中节点的体系结构,代理的结构、管理与生存周期并给出了一个应用实例。In this paper, a system model of mobile agent construction and management was presented. It uses ECA rules of Active Database to define the logic structure of the agent and uses the trigger mechanism of Active Database to manage and execute the agent. By this means not only the architecture of the P2P system supporting instant and contiguous query is significantly simplified, but also the security and efficiency of information are guaranteed through the security mechanism of the Active Database. The architecture of a mobile P2P system node was firstly presented, followed by the structure, management and life cycle of the mobile agent and lastly an application instance was given.

关 键 词：P2P数据交换系统 查询处理 移动代理 主动数据库 

分 类 号：TP392[自动化与计算机技术—计算机应用技术]