Integrating the Java 2 Enterprise Environment with Java Data Objects

Abstract. Whenever object-oriented applications that use the Enterprise JavaBeans (EJB) environment have to store data in a database, there is a need to combine EJBs with access to persistent data. The current use of entity beans for persistent data storage has a number of weaknesses. Component level inheritance and dynamic querying are not supported appropriately, and the whole approach seems to be overweight. In order to overcome these weaknesses, we implemented a JCA 1-compliant resource adapter, which enables the use of Java Data Objects (JDO) instead of Entity Beans and allows the introduction of a lightweight, easy to use and powerful transparent persistence layer for the Java 2 Enterprise Environment (J2EE)