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

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.