Research And Application Of The Middleware System Based On EJB Programming Model

J2EE has been the developping direction of the enterprisecomputing in future and that EJB is the core technology for J2EE. EJBis one of the JAVA midd1eware, it is the component mode1 on the JAVAapp1 ication p1atform. In this discourse, 1 wi 1l ana1yzing the genera1situation of the EJB and discourse upon the framework of the EJB indetai1. We a1so detai1 the role in the EJB.I di scourse upon the session bean \ ent ity bean. message--driven beanthrough their 1if e cycle. persistence. state and interaction withc1ient apart. Emphasizing to ana1yse the session bean and entitybean. Have a detai1 research in app1ication. life cyc1e and type of thesession bean. Compare of the difference between stateful session beanand stateless sess ion bean. Di scussing the two types of ent ity bean, BMPand CMP through the view of persistence management. At the sametime, giving the new concept message--driven bean.At last, giving a example for describing how to des ign a who1e systembased on EJB.