访问多个数据源CMP实体Bean的实现方法

A Method for Accessing Multi-data Sources Based on CMP Entity Beans

使用容器管理的永久性实体EJB,无法实现属性跨越多个继承的DBMS。通过集成WAS和多重数据库服务器,进行EJB的开发、测试和部署,可以透明地处理多个DBMS的关系,利用基于视图法和直接映射法,可实现CMP实体Bean对多个数据源的访问。当电子商务应用的关键数据存在于多种数据源中,且拥有处理管理问题的数据库功能时,这种技术组合是最佳选择。

Using container management entities EJB cannot realize to design attributes beyond more succeeded DBMSs. Through integrating WAS and a multiple databases server, EJB developments, tests and deployments are implemented, and many DBMS relations may be transparently processed. Using view-based methods and direct mapping methods, CMP entity bean may access multi data sources. When key data of e-commerce applications exists in multiple data sources and has database functions dealing with the managements, this method is the best option.