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在基于对等网的异构数据集成系统中,部署在各个异构数据对等体上的数据库系统具有分布性、独立性和异构性,对等体间的数据需要进行交换、整合,实现信息共享,这就使数据更新成为数据集成系统的一个重要课题。由于现有的一些数据集成技术,如各种专业转换工具、联邦数据库等,都存在着灵活性差、交互性低等缺点。文中提出了将包装器和JXTA通信适配器相结合的方案,实现了异构数据对等体间数据库的信息访问、集成信息双向传输、资源的发现以及差异信息的主动式同步。
In heterogeneous data integration systems based on P2P networks, the database systems deployed on heterogeneous data peers are distributed, independent and heterogeneous. The data between peers needs to be exchanged, integrated and implemented Information sharing, which makes data updates an important issue in data integration systems. Due to some existing data integration technologies, such as various professional conversion tools, federal databases, etc., there are disadvantages such as poor flexibility and low interactivity. In this paper, we propose a scheme that combines wrapper and JXTA communication adapter to realize the information access of heterogeneous data peer database, bidirectional transmission of integrated information, resource discovery and active synchronization of difference information.